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  Subjects -> AGRICULTURE (Total: 793 journals)
    - AGRICULTURAL ECONOMICS (70 journals)
    - AGRICULTURE (557 journals)
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    - POULTRY AND LIVESTOCK (46 journals)

AGRICULTURE (557 journals)                  1 2 3 | Last

Showing 1 - 200 of 263 Journals sorted alphabetically
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
Acta agriculturae Slovenica     Open Access   (Followers: 4)
Acta Agrobotanica     Open Access   (Followers: 4)
Acta Agronomica Hungarica     Full-text available via subscription   (Followers: 2)
Acta Agronomica Sinica     Full-text available via subscription   (Followers: 5)
Acta Biologica Sibirica     Open Access  
Acta Scientiarum. Animal Sciences     Open Access   (Followers: 3)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Technologica Agriculturae     Open Access   (Followers: 1)
Acta Universitatis Sapientiae, Alimentaria     Open Access   (Followers: 1)
Advances in Agriculture     Open Access   (Followers: 7)
Advances in Agriculture & Botanics     Open Access   (Followers: 14)
Advances in Agronomy     Full-text available via subscription   (Followers: 15)
Advances in Horticultural Science     Open Access  
Advances in Life Science and Technology     Open Access   (Followers: 14)
Africa Research Bulletin: Political, Social and Cultural Series     Hybrid Journal   (Followers: 9)
African Journal of Agricultural Research     Open Access   (Followers: 3)
African Journal of Food Science     Open Access   (Followers: 5)
African Journal of Food, Agriculture, Nutrition and Development     Open Access   (Followers: 15)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 6)
Agra Europe     Full-text available via subscription   (Followers: 3)
Agribusiness : an International Journal     Hybrid Journal   (Followers: 6)
Agric     Open Access  
Agricultura     Open Access   (Followers: 1)
Agricultura Tecnica     Open Access   (Followers: 5)
Agricultura Tropica et Subtropica     Open Access   (Followers: 1)
Agricultura, Sociedad y Desarrollo     Open Access   (Followers: 1)
Agricultural Advances     Open Access   (Followers: 3)
Agricultural and Food Science     Open Access   (Followers: 18)
Agricultural Commodities     Full-text available via subscription  
Agricultural Economics     Hybrid Journal   (Followers: 45)
Agricultural History Review     Full-text available via subscription   (Followers: 9)
Agricultural Research     Hybrid Journal   (Followers: 3)
Agricultural Science     Open Access   (Followers: 2)
Agricultural Science     Full-text available via subscription   (Followers: 5)
Agricultural Sciences     Open Access   (Followers: 7)
Agricultural Systems     Hybrid Journal   (Followers: 30)
Agricultural Water Management     Hybrid Journal   (Followers: 39)
Agriculture     Open Access   (Followers: 7)
Agriculture & Food Security     Open Access   (Followers: 12)
Agriculture (Poľnohospodárstvo)     Open Access   (Followers: 2)
Agriculture and Agricultural Science Procedia     Open Access  
Agriculture and Biology Journal of North America     Open Access  
Agriculture and Food Sciences Research     Open Access   (Followers: 4)
Agriculture and Human Values     Hybrid Journal   (Followers: 12)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 54)
Agriprobe     Open Access  
Agrivita : Journal of Agricultural Science     Open Access   (Followers: 2)
Agro-Science     Full-text available via subscription  
Agroalimentaria     Open Access  
Agrociencia     Open Access   (Followers: 1)
Agrociencia Uruguay     Open Access  
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
Agronomía Colombiana     Open Access  
Agronomía Costarricense     Open Access   (Followers: 1)
Agronomía Mesoamericana     Open Access  
Agronomie Africaine     Full-text available via subscription  
Agronomy     Open Access   (Followers: 11)
Agrosearch     Open Access   (Followers: 1)
Akademik Ziraat Dergisi     Open Access  
Alinteri Zirai Bilimler Dergisi : Alinteri Journal of Agricultural Sciences     Open Access  
Ambiência     Open Access  
Ambiente & Agua : An Interdisciplinary Journal of Applied Science     Open Access   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 10)
American Journal of Botany     Full-text available via subscription   (Followers: 15)
American Journal of Economics and Sociology     Hybrid Journal   (Followers: 28)
American Journal of Potato Research     Hybrid Journal   (Followers: 2)
American Journal of Rural Development     Open Access   (Followers: 4)
Anais da Academia Brasileira de Ciências     Open Access   (Followers: 2)
Annales des Sciences Agronomiques     Full-text available via subscription  
Annals of Agricultural Sciences     Open Access   (Followers: 2)
Annals of Silvicultural Research     Open Access   (Followers: 1)
Annals Valahia University of Targoviste - Agriculture     Open Access  
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 12)
APCBEE Procedia     Partially Free   (Followers: 1)
Applied Financial Economics Letters     Hybrid Journal   (Followers: 8)
Arboricultural Journal : The International Journal of Urban Forestry     Hybrid Journal   (Followers: 7)
Archivos de Zootecnia     Open Access   (Followers: 1)
ARO. The Scientific Journal of Koya University     Open Access  
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 2)
Asian Economic Papers     Hybrid Journal   (Followers: 7)
Asian Journal of Agricultural Research     Open Access   (Followers: 4)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 2)
Asian Journal of Plant Sciences     Open Access   (Followers: 3)
Australian Cottongrower, The     Full-text available via subscription   (Followers: 1)
Australian Economic Papers     Hybrid Journal   (Followers: 29)
Australian Economic Review     Hybrid Journal   (Followers: 6)
Australian Forest Grower     Full-text available via subscription   (Followers: 3)
Australian Forestry     Full-text available via subscription   (Followers: 2)
Australian Grain     Full-text available via subscription   (Followers: 3)
Australian Holstein Journal     Full-text available via subscription   (Followers: 1)
Australian Journal of Agricultural and Resource Economics     Hybrid Journal   (Followers: 3)
Australian Journal of Agricultural Engineering     Open Access   (Followers: 1)
Australian Sugarcane     Full-text available via subscription  
Avances en Investigacion Agropecuaria     Open Access   (Followers: 1)
Bangladesh Agronomy Journal     Open Access   (Followers: 1)
Bangladesh Journal of Agricultural Research     Open Access   (Followers: 3)
Bangladesh Journal of Scientific Research     Open Access   (Followers: 1)
Bioagro     Open Access   (Followers: 1)
Biocatalysis and Agricultural Biotechnology     Hybrid Journal   (Followers: 4)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodiversity     Hybrid Journal   (Followers: 27)
Biodiversity : Research and Conservation     Open Access   (Followers: 26)
Biological Agriculture & Horticulture : An International Journal for Sustainable Production Systems     Partially Free   (Followers: 11)
Biosystems Engineering     Hybrid Journal   (Followers: 9)
Biotecnología en el Sector Agropecuario y Agroindustrial     Open Access  
Biotemas     Open Access  
Boletín Semillas Ambientales     Open Access  
Bragantia     Open Access   (Followers: 2)
Brazilian Archives of Biology and Technology     Open Access   (Followers: 3)
British Poultry Science     Hybrid Journal   (Followers: 4)
Buletin Peternakan : Bulletin of Animal Science     Open Access   (Followers: 1)
Buletin Veteriner Udayana     Open Access   (Followers: 3)
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca : Food Science and Technology     Open Access   (Followers: 1)
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture     Open Access   (Followers: 1)
Caderno de Ciências Agrárias     Open Access  
Cahiers Agricultures     Open Access  
California Agriculture     Open Access   (Followers: 2)
Cambridge Journal of Economics     Hybrid Journal   (Followers: 58)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 20)
Capitalism Nature Socialism     Hybrid Journal   (Followers: 12)
Ceiba     Open Access  
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
CERNE     Open Access  
CESifo Economic Studies     Hybrid Journal   (Followers: 16)
Change and Adaptation in Socio-Ecological Systems     Open Access   (Followers: 1)
Chemical and Biological Technologies for Agriculture     Open Access  
Chilean Journal of Agricultural Research     Open Access   (Followers: 1)
Ciencia & Natura     Open Access  
Ciência e Agrotecnologia     Open Access  
Ciencia e investigación agraria     Open Access   (Followers: 1)
Ciência e Técnica Vitivinícola     Open Access  
Ciencia forestal en México     Open Access  
Ciência Rural     Open Access   (Followers: 2)
Ciencia y Agricultura     Open Access  
Ciencia, Tecnología y Salud     Open Access  
COCOS : The Journal of the Coconut Research Institute of Sri Lanka     Open Access   (Followers: 1)
Coffee Science     Open Access  
Cogent Food & Agriculture     Open Access   (Followers: 3)
Competition & Change     Hybrid Journal   (Followers: 10)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Contributions to Tobacco Research     Open Access   (Followers: 2)
Corps et culture     Open Access   (Followers: 5)
Cuadernos de Desarrollo Rural     Open Access   (Followers: 1)
Cultivos Tropicales     Open Access  
Cultural Geographies     Hybrid Journal   (Followers: 18)
Cultural Sociology     Hybrid Journal   (Followers: 32)
Cultural Studies - Critical Methodologies     Hybrid Journal   (Followers: 16)
Cultural Studies of Science Education     Hybrid Journal   (Followers: 6)
Cultural Trends     Hybrid Journal   (Followers: 15)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 12)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 7)
Current Agricultural Science and Technology     Open Access  
Current Agriculture Research Journal     Open Access   (Followers: 1)
Current Life Sciences     Open Access   (Followers: 3)
Current Research in Dairy Sciences     Open Access   (Followers: 5)
Developments in Agricultural Economics     Full-text available via subscription   (Followers: 4)
Developments in Agricultural Engineering     Full-text available via subscription   (Followers: 1)
Diatom Research     Hybrid Journal   (Followers: 2)
Die Bodenkultur : Journal of Land Management, Food and Environment     Open Access  
Dossiers Agraris     Open Access  
Ecological Applications     Full-text available via subscription   (Followers: 148)
Economic Affairs     Hybrid Journal   (Followers: 6)
Economic and Industrial Democracy     Hybrid Journal   (Followers: 8)
Economic Bulletin     Hybrid Journal   (Followers: 4)
Economic Policy     Hybrid Journal   (Followers: 63)
Economic Record     Hybrid Journal   (Followers: 7)
Emirates Journal of Food and Agriculture     Open Access   (Followers: 1)
Empirical Economics     Hybrid Journal   (Followers: 15)
Encuentro     Open Access  
Engineering in Agriculture, Environment and Food     Hybrid Journal  
Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde     Open Access  
Eppo Bulletin     Hybrid Journal   (Followers: 2)
Ethiopian Journal of Agricultural Sciences     Open Access  
Ethiopian Journal of Science and Technology     Open Access  
Ethology     Hybrid Journal   (Followers: 6)
EU agrarian Law     Open Access   (Followers: 3)
Euphytica     Hybrid Journal   (Followers: 7)
Eurochoices     Hybrid Journal   (Followers: 1)
European Agrophysical Journal     Open Access  
European Journal of Agronomy     Hybrid Journal   (Followers: 11)
European Journal of American Culture     Hybrid Journal   (Followers: 2)
European Journal of Health Economics     Hybrid Journal   (Followers: 19)
European Journal of Law and Economics     Hybrid Journal   (Followers: 64)
European Review of Agricultural Economics     Hybrid Journal   (Followers: 11)
EvoDevo     Open Access   (Followers: 3)
Extensão Rural     Open Access   (Followers: 1)
Farmer’s Weekly     Full-text available via subscription  
Farmlink Africa     Full-text available via subscription  
Fitosanidad     Open Access  
Florea : Jurnal Biologi dan Pembelajarannya     Open Access  
Folia Horticulturae     Open Access   (Followers: 3)
Food and Agricultural Immunology     Hybrid Journal   (Followers: 2)
Food and Energy Security     Open Access   (Followers: 4)
Food Biotechnology     Hybrid Journal   (Followers: 12)
Food Economics - Acta Agriculturae Scandinavica, Section C     Hybrid Journal   (Followers: 2)
Food New Zealand     Full-text available via subscription   (Followers: 4)
Food Policy     Hybrid Journal   (Followers: 31)

        1 2 3 | Last

Journal Cover American Journal of Potato Research
  [SJR: 0.558]   [H-I: 35]   [2 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1874-9380 - ISSN (Online) 1099-209X
   Published by Springer-Verlag Homepage  [2352 journals]
  • Potato Common Scab: a Review of the Causal Pathogens, Management
           Practices, Varietal Resistance Screening Methods, and Host Resistance
    • Authors: Sarah Braun; Amanda Gevens; Amy Charkowski; Christina Allen; Shelley Jansky
      Pages: 283 - 296
      Abstract: Abstract Potato common scab is a widespread disease in which scab-like lesions develop on tubers. The disease is caused by pathogenic Streptomyces species, which synthesize the phytotoxin thaxtomin. The txtAB operon, responsible for thaxtomin production, can be used as a marker to identify pathogenic strains of the bacterium. Screening methods to assess scab susceptibility in breeding programs are time-consuming and can produce variable results. Management practices to control the disease vary and include crop rotation, tolerant varieties, monitoring soil pH, avoiding low soil moisture at tuber initiation, and application of soil- and/or seed-applied pesticides. There is a wide range in levels of tolerance among potato varieties. Many public research programs are committed to breeding for scab-tolerant varieties and evaluating management methods. Topics reviewed target readers focused on breeding and disease management objectives to reduce the incidence and severity of potato common scab.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9575-3
      Issue No: Vol. 94, No. 4 (2017)
  • Predictive Markers for Cold-Induced Sweetening Resistance in Cold Stored
           Potatoes ( Solanum tuberosum L.)
    • Authors: Sanjay K. Gupta
      Pages: 297 - 305
      Abstract: Abstract An approach has been developed to screen a large number of potato clones for cold induced sweetening (CIS) resistance in breeding programs. Two key enzymes responsible for reducing sugar accumulation during cold storage were identified. Clones with the A-II isozymes of UDP-glucose pyrophosphorylase coupled with low activity of vacuolar acid invertase enzyme had increased resistance to CIS by forming less suc, which is subsequently hydrolyzed to the undesirable reducing sugars, glc and fru. Six named cultivars and 192 genetically diverse clones from various breeding programs in USA were analyzed over two years for the two key enzymes and sugar concentration in cold stored tubers. The predictability for CIS resistance during cold storage was 94% both years. Clones classified as class A accumulated low concentration of reducing sugar glc during cold storage. It is suggested that these two predictor enzymes can be used for screening parents and selections in potato breeding program.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9565-5
      Issue No: Vol. 94, No. 4 (2017)
  • Genetic Diversity and Redundancy Among Potato Accessions in the
           Montenegrin Collection as Revealed by Microsatellite Markers
    • Authors: Marko Maras; Aleš Sedlar; Alex Reid; Vladan Božović; Zoran Jovović; Vladimir Meglič; Peter Dolničar
      Pages: 306 - 313
      Abstract: Abstract Potato was introduced in Montenegro in the middle of the eighteenth century. Since then it has become the most important crop in plant production. During the period between 2008 and 2010 a total of 52 potato accessions was collected across Montenegro and stored in a national gene bank. In the study reported here 23 accessions from the collection were examined using microsatellite (also known as simple sequence repeats or SSRs) molecular markers with the aim to explore genetic diversity and redundancy within the germplasm. The accessions were selected on the basis of preliminary characterization of all 52 accessions for 11 lightsprout traits. Molecular characterization of 23 accessions by 12 SSR markers was carried out at SASA (Science and Advice for Scottish Agriculture) that manages a database of more than 3000 genetic profiles of potato from Europe and abroad. Comparison of SSR genetic profiles of Montenegrin collection against the existing SASA database allowed us to test the authenticity of the Montenegrin accessions. Out of the 23 accessions examined, 13 showed distinct genetic profiles of which seven showed perfect matching with known cultivars, two profiles showed strong similarity to another two cultivars, and four profiles were found unique with regards to the SASA database. Application of microsatellite markers in this study provided valuable information on the extent of genetic diversity residing within Montenegrin potato germplasm; it gave clear indications of the scale of redundancy within the collection; and helped clarify the identity of the accessions. Four accessions within the collection might incorporate unique variation and will be subjected to further agronomical examinations to assess their potential for breeding purposes.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9566-4
      Issue No: Vol. 94, No. 4 (2017)
  • BC 1 and F 1 Progeny from Solanum × michoacanum (+) S. tuberosum Somatic
           Hybrids, Autofused 4 × S. michoacanum and Cultivated Potato
    • Authors: Paulina Smyda-Dajmund; Jadwiga Śliwka; Iwona Wasilewicz-Flis; Henryka Jakuczun; Ewa Zimnoch-Guzowska
      Pages: 323 - 333
      Abstract: Abstract Solanum × michoacanum (mch) is a valuable source of resistance to Phytophthora infestans and has not been used in potato breeding due to crossing barriers with S. tuberosum. Somatic hybridization followed by backcrossing is a strategy for introgression of important traits from wild potato species sexually isolated from S. tuberosum. Tetraploid somatic hybrids Solanum × michoacanum (+) S. tuberosum [mch (+) tbr] and autofused 4× mch lines were crossed to several potato cultivars as male and female parents. Our results indicate that resistance against late blight, originating from mch (+) tbr somatic hybrids and autofused 4× mch lines can be transferred to cultivated potato by sexual crossing. Viable and fertile progeny was obtained providing a route to using mch as a source of resistance to P. infestans in potato breeding.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9568-2
      Issue No: Vol. 94, No. 4 (2017)
  • Effects of Holding Temperatures on the Development of Zebra Chip Symptoms,
           ‘ Candidatus Liberibacter Solanacearum’ Titers, and Phenolic Levels in
           ‘Red La Soda’ and ‘Russet Norkotah’ Tubers
    • Authors: C. M. Wallis; A. Rashed; F. Workneh; L. Paetzold; C. M. Rush
      Pages: 334 - 341
      Abstract: Abstract ‘Candidatus Liberibacter solanacearum’ (Lso) is the putative causal agent of zebra chip disease (ZC). Late season Lso-infected potatoes that are known to be asymptomatic at harvest may continue to develop symptoms by the time of shipment to consumers. This study observed symptom development, Lso titer changes, and changes in symptom-associated phenolic compounds in Lso-infected yet asymptomatic tubers placed at different holding temperatures. ZC symptoms present in freshly-sliced tubers were more severe in ‘Red La Soda’ or ‘Russet Norkotah’ tubers held at 3 °C than at 6 °C or 9 °C. However, Lso titers showed considerable variability in both cultivars over time and at these holding temperatures. Phenolic compound levels, known to be associated with ZC symptom severity, in tubers kept at 3 °C were greater than those kept at 6 °C or 9 °C and increased over time. These results demonstrate that ZC could develop in tubers kept in cold storage, with those kept at 3 °C having more ZC development than those kept at 6 °C or 9 °C.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9569-1
      Issue No: Vol. 94, No. 4 (2017)
  • Characterization of the Tolerance against Zebra Chip Disease in Tubers of
           Advanced Potato Lines from Mexico
    • Authors: O. A. Rubio-Covarrubias; M. A. Cadena-Hinojosa; S. M. Prager; C. M. Wallis; J. T. Trumble
      Pages: 342 - 356
      Abstract: Abstract Potato zebra chip disease (ZC), a threat to potato production in the USA, Mexico, New Zealand, and Central America, is associated with the bacterium “Candidatus Liberibacter solanacearum” (Cls) that is vectored by the potato psyllid (Bactericera cockerelli Sulc.). ZC control currently depends on insecticide applications, but sustainable control will require development of resistant and/or tolerant varieties. This study characterized four promising potato lines (246, 865, 510 and NAU) exposed to Cls-positive adult psyllids in choice and no-choice assays for ZC resistance. Psyllids preferred to settle on Atlantic over 246 and 865, and oviposit on Atlantic compared to 510. However, tolerance to ZC appeared more dependent on host responses to Cls infection. All four of these potato genotypes exhibited putative ZC tolerance in raw tubers compared to the susceptible commercial variety Atlantic. Expressed tolerance was associated with reduced concentrations of phenolic compounds in Cls-infected raw tubers with corresponding reductions in freshly-cut symptoms. However, these four genotypes exhibited ZC-linked discoloration of fried tuber slices, which was associated with increased sugar content that occurred following Cls-infection. As a result, these four ZC-tolerant experimental potato lines could be useful if the tubers produced are used for fresh, but not processing, markets.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9570-8
      Issue No: Vol. 94, No. 4 (2017)
  • Assessment of Growth, Tuber Elemental Composition, Stomatal Conductance
           and Chlorophyll Content of Two Potato Cultivars Under Irrigation with Fly
           Ash-Treated Acid Mine Drainage
    • Authors: Maropeng Vellry Nemutanzhela; David Mxolisi Modise; Kotose Joseph Siyoko; Sheku Alfred Kanu
      Pages: 367 - 378
      Abstract: Abstract The impact of fly ash (FA)-treated acid mine drainage (AMD) on growth, tuber yield and elemental composition, stomatal conductance and chlorophyll content of two potato cultivars was assessed. Two potato cultivars were irrigated with the following treatments: tap water (0% AMD/control), acid mine drainage mixed with fly ash (v/v); 25% AMD, 50% AMD & 75% AMD and untreated AMD (100% AMD). A complete randomized block design pot experiment with six replicates per treatment was conducted in two cropping seasons. Irrigation with 75% AMD in both cropping seasons significantly increased growth and tuber yield compared with control. However, unsafe levels of Ni, Zn, and Sr were found in tubers of both cultivars irrigated with FA-treated AMD treatments in both seasons. Additionally, FA-treated AMD treatments reduced leaf stomatal conductance and chlorophyll content relative to control in both cultivars. Cultivar response was found to differ with respect to all measured parameters.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9572-6
      Issue No: Vol. 94, No. 4 (2017)
  • Sage Russet: a New High Yielding Russet Potato Variety with
           Cold-Sweetening Resistance, High Vitamin C and Protein Contents and
           Excellent Fresh Pack and Processing Potential
    • Authors: S. Yilma; B. A. Charlton; C. C. Shock; D. C. Hane; S. R. James; A. R. Mosley; K. A. Rykbost; E. B. G. Feibert; N. R. Knowles; M. J. Pavek; J. C. Stark; R. G. Novy; J. L. Whitworth; J. J. Pavek; D. L. Corsini; T. L. Brandt; N. Olsen; C. R. Brown; M. I. Vales; V. Sathuvalli
      Pages: 379 - 389
      Abstract: Abstract Sage Russet was released in 2009 by Oregon State University, in cooperation with the USDA-ARS and the Agricultural Experiment Stations of Idaho and Washington. It is a product of the Northwest Potato Variety (Tri-State) Development Program. Sage Russet has a medium-early maturity and produces long, somewhat flattened tubers with medium russeting of the skin. Total yields of Sage Russet are similar to those of Russet Burbank and Ranger Russet, but are significantly higher than those of Russet Norkotah. Sage Russet has significantly higher U.S. No.1 yields than Russet Burbank, Russet Norkotah, and Ranger Russet. It can be grown as an early or late crop with high U.S. No.1 yields and minimal internal defects. It achieved very high merit scores in processing and fresh market in Western Regional trials and can be considered for both markets. Sage Russet has a medium to high fertility requirements with high nitrogen use efficiency and medium storage capability. Sage Russet has moderate specific gravity and produces lighter fry color than the industry standard varieties. The color of fried strips following tuber storage at 4.4 °C and 7.2 °C is significantly lighter for Sage Russet than the control varieties, indicating good cold sweetening resistance. Chemical analyses have shown that Sage Russet has higher protein and vitamin C content than control varieties. Sage Russet is moderately resistant to early dying, early blight, and common scab, is resistant to tuber late blight, but susceptible to Fusarium wilt and is prone to shatter bruise.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9573-5
      Issue No: Vol. 94, No. 4 (2017)
  • Genetic and Pathogenic Diversity of Ralstonia solanacearum Causing Potato
           Brown Rot in China
    • Authors: Li Wang; Bingsen Wang; Guozhen Zhao; Xingkui Cai; Suha Jabaji; Philippe Seguin; Huilan Chen
      Pages: 403 - 416
      Abstract: Abstract Causing potato brown rot, Ralstonia solanacearum (R. solanacearum) strains are reported as one of the most destructive bacteria to potato (Solanum tuberosum L.) in China. In this study, 113 strains were isolated from potato, collected in the four major agroecological zones in China. The study showed that 102 strains belonged to the phylotype IIB sequevar 1 (race 3 biovar 2). The 11 remaining strains belonged to the phylotype I, sequevar 13, 17, 18, 16 or 14 M, a new sequevar closely related to sequevar 14. Thirty-four strains were further characterized according to their virulence at low temperature on three wild potato species. IIB-1 strains all belonged to high and moderate virulence, while others belonged to the low virulence group, which had limited pathogenicity.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9576-2
      Issue No: Vol. 94, No. 4 (2017)
  • Isolation and Culture of Pollen Tetrad Protoplasts from Solanum tuberosum
    • Authors: Yuping Wang; Lixiang Cheng; Yanchao Liang; Xiao Lu; Feng Zhang
      Pages: 417 - 424
      Abstract: Abstract Pollen protoplasts provide a sexual and haploid system for haploid production, cell fusion and mutation studies used in plant improvement. Due to the multiploidy, heterozygosity, and often self-incompatibility in tetraploid genotypes, haploid potatoes are desirable for breeding schemes via ploidy manipulations. In this study, two tetraploid varieties and two dihaploid lines of potato were used for pollen tetrad protoplast isolation and culture. The meiotic tetrad buds were first pre-treated at 5 °C for 0–12 days, then the tetrads were transferred into enzyme solutions containing different concentrations of snailase (0.5–1.5%), 0.3 M osmolites (sucrose, mannitol, glucose or sorbitol), 1.0% Cellulose, 0.5% Hemicellulase, 0.5% Pectolyase, 0.3% Sucrose, 3 mM 2-(N-Morpholino) ethane sulfonic acid, 1% polyvinyl pyrrolidone, 0.01% casein hydrolysate and K3 medium compositions. Among the four donor materials, tetraploid cv. Gannongshu No. 3 (‘GNS No.3’) showed the greatest protoplast yield (74.6 ± 2.4%). In this variety, most of the tetrad protoplasts regenerated a cell wall and continued cell divisions were observed when they were inoculated in K3 basic medium supplemented with (0.5–1.0) mg/L 2,4-D + (0.1–0.5) mg/L KT + 0.4 mg/L 6-BA +800 mg/L glutamine +100 mg/L serine. ‘GNS No.3’ also showed the greatest first division frequency (21.6 ± 1.5%) and sustained division to form multicellular structures. The study findings suggested that cultured tetrad pollen protoplasts could reverse the gametophytic developmental pattern programmed in vivo to a sporophytic pathway leading to multicellular microspore-derived colonies.
      PubDate: 2017-08-01
      DOI: 10.1007/s12230-017-9578-0
      Issue No: Vol. 94, No. 4 (2017)
  • Sensory Evaluation of Eleven Baked Russet-type Potato Varieties and Clones
    • Authors: Rulon R. Spear; Zach J. Holden; C. F. Ross; B. J. Weddell; Mark J. Pavek
      Abstract: Abstract Six hundred untrained panelists evaluated the baked sensory appeal of up to six varieties, three clones, and two Russet Norkotah (RN) strains. Panelists consumed small samples of plain baked potato and recorded their preference for aroma, flavor, texture, aftertaste and acceptance. After viewing photographs of two unidentified baked potatoes (RN and Classic Russet) sliced in half, they selected the photo that best described their visual preference of a baked potato; each potato was stored at 6.7 °C for 6 months prior to cooking. Eighty percent of panelists shown the photographs of the unidentified baked potatoes preferred the visual appearance of Classic R (white/cream - colored  flesh) to that of RN (yellow/Gy - colored flesh). Mean scores for all culinary traits averaged > 5.0 on the 1-9 scale, which indicated that panelists generally liked the culinary attributes of all trialed varieties, however, panelists were able to detect differences among varieties. Flavor and texture were addressed in written comments from panelists more frequently than other attributes. On a texture scale of 1–7, with 1 = moist/dense and 7 = dry/crumbly, most panelists preferred baked potatoes with a texture of 3 (creamy/smooth).
      PubDate: 2017-09-18
      DOI: 10.1007/s12230-017-9607-z
  • High-Resolution Aerial Imaging Based Estimation of Crop Emergence in
    • Authors: Sindhuja Sankaran; Juan José Quirós; N. Richard Knowles; Lisa O. Knowles
      Abstract: Abstract Plant emergence and stand establishment are key indicators of early crop development that are routinely assessed in potato agronomy and crop improvement research. The standard method for evaluating emergence is through manual plant counts at regular intervals. In this proof-of-concept study, unmanned aerial vehicles integrated with multispectral imaging were used for high-throughput evaluation of crop emergence under field conditions. High-resolution aerial imaging was performed at 15 m above ground level to capture data from potato plots of two varieties (‘Alturas’ and ‘Payette Russet’) in which the seed had been treated with different concentrations of growth regulators (including non-treated controls). The treatments resulted in differences in plant emergence and establishment. The images were collected at 32, 37, and 43 days after planting (DAP). Image-based features such as plant count, SUM-NDVI, and SUM-BINARY were computed from normalized difference vegetation index (NDVI) images for each treatment plot using ArcGIS®. The Pearson’s correlation coefficients (r) were significant (p < 0.05) between image-based plant counts (r = 0.82) and SUM-NDVI (r = 0.62-0.73) with that of manual plant counts for both varieties, especially at early growth stages (32 DAP) when differences in emergence among treatments were more pronounced. The treatment effects on plant emergence and establishment were effectively resolved in the aerial multispectral images. Selection of the pertinent polygon threshold area to eliminate noise in delineating individual plants during image processing was important for resolution of treatment effects. The data shows that the technique can be applied in potato establishment evaluation.
      PubDate: 2017-09-15
      DOI: 10.1007/s12230-017-9604-2
  • Recovery of Protease Inhibitors from Potato Fruit Water by Expanded Bed
           Adsorption Chromatography in Pilot Scale
    • Authors: Cheng-yu Jin; Fan-kui Zeng; Gang Liu
      Abstract: Abstract The current study was conducted to investigate the recovery of native potato protein from potato fruit water (PFW) by expanded bed adsorption (EBA) chromatography. The eluted proteins were concentrated by ultrafiltration and spray-dried into powder. The SDS-PAGE showed that the recovered proteins were potato protease inhibitors (PPIs). The trypsin and chymotrypsin inhibitor activities of the recovered PPIs were 377.93 ± 8.22 and 12.90 ± 0.03 mg g−1 protein, respectively. The recovery yield of protease inhibitors was 74.88%. The glycoalkaloid assay showed that the recovered PPIs contained 30.31 ± 0.15 μg g−1 of α-chaconine and 92.77 ± 0.52 μg g−1 of α-solanine, and these values were much lower than those in potato protein concentrate (PPC) obtained by traditional thermal coagulation. The most abundant amino acid in the PPIs was serine. The results indicated that the EBA can be used to effectively recover native potato protein from PFW.
      PubDate: 2017-09-15
      DOI: 10.1007/s12230-017-9605-1
  • Draft Genome Sequencing of Rhizoctonia solani Anastomosis Group 3 (AG3-
           PT) Causing Stem Canker and Black Scurf of Potato
    • Authors: Virupaksh U. Patil; Vanishree Girimalla; Vinay Sagar; Vinay Bhardwaj; S. K. Chakrabarti
      Abstract: Abstract Rhizoctonia solani is a soil-borne basidiomycete fungus with a necrotrophic lifestyle being classified into fourteen reproductively incompatible anastomosis groups (AGs). AG3-PT (a potato subgroup) is associated with quantitative and qualitative yield losses through stem canker and black scurf in potato. Here we present the first draft sequence of the R. solani [AG3-PT] strain RS-20 with a G-C content of 48.3%. It consists of 11,431 total predicted protein coding regions including 181 tRNA and 31 rRNA coding genes. The initial pBLAST revealed more than 97% hits among AG groups where as only 1.7% of genes hit with other organisms. The R. solani genome is found to be dominated with tri mer repeats. The genome-wide evolutionary studies revealed the close association of AG3-PT with AG3. The draft sequence represents a helpful resource not only for understanding the core genes involved in pathogenecity but also evolution and adaptive behaviour within the R. solani species complex.
      PubDate: 2017-09-15
      DOI: 10.1007/s12230-017-9606-0
  • High Levels of Heterozygosity Found for 15 SSR Loci in Solanum chacoense
    • Authors: Kathleen G. Haynes; Haitham E. M. Zaki; Christian T. Christensen; Elizabeth Ogden; Lisa J. Rowland; Matthew Kramer; Lincoln Zotarelli
      Abstract: Abstract Wild species-related germplasm is widely used to introduce new alleles and/or increase heterozygosity in cultivated species. Twenty-four SSR markers, specifically designed for cultivated potatoes, were evaluated to determine the extent of genetic variation within and among ten accessions of Solanum chacoense (chc). Fifteen of these markers were informative: there was no polymorphism in one of the markers, four of the markers showed evidence that more than one locus was being amplified, and the other four markers failed to consistently amplify products. Heterozygosity in these 10 accessions ranged from 33% to 87%. Variation among accessions was the largest proportion of variance for three markers, variation among genotypes within accessions was the largest proportion for three markers, and for the other nine markers variation within genotypes (chromosome to chromosome) was the largest proportion. Genetic similarity averaged 29.5% across markers. Where accessions have already been screened and found to possess the trait of interest, multiple genotypes from those accessions should be evaluated to identify genotypes with the greatest expression of the trait.
      PubDate: 2017-08-25
      DOI: 10.1007/s12230-017-9602-4
  • Effective Management of the Phthorimaea operculella (Zeller) Using PVA
           Nanofibers Loaded with Cinnamomum zeylanicum Essential Oil
    • Authors: Vahid Mahdavi; Hooshang Rafiee-Dastjerdi; Asadollah Asadi; Jabraeil Razmjou; Bahram Fathi Achachlouei; Shizuo George Kamita
      Abstract: Abstract Phthorimaea operculella (Zeller) is one of the most common insect pests of cultivated potato in tropical and subtropical regions. In this research, a potential strategy to improve the insecticidal activity of plant essential oils for the effective management of P. operculella was studied. The insecticidal and residual effects of nanofiber oil (NFO) and pure essential oil (PEO) of Cinnamomum zeylanicum were assessed on PTM under laboratory conditions. The nanofibers were made by the electrospinning method using polyvinyl alcohol (PVA) polymer. The morphological characteristics of the nanofibers were evaluated by scanning electron microscopy and Fourier transform infrared spectroscopy. The chemical constituents of cinnamon essential oil (EO) were detected by GC/MS. Fumigant toxicity of NFO and PEO were evaluated on different growth stages (egg, male and female adults) of P. operculella. SEM and FTIR analyses confirmed the presence of EO on the nanofiber structure. The yield of the EO from C. zelanicum on the nanofibers was 1.86%. GC/MS analysis showed that cinnamaldehyde was the primary constituent (69.88%) of cinnamon EO. LC50 values of C. zelanicum EO and NFO were 4.92 and 1.76 μl/l air for eggs, 0.444 and 0.212 μl/l air for female adults, and 0.424 and 0.192 μl/l air for male adults, respectively. Fumigant bioassays revealed that NFO was more toxic than C. zeylanicum oil against at all stages of P. operculella. The residual effect of PEO and NFO was evaluated against the egg stage of the P. operculella. NFO lost insecticidal effectiveness 47 days after application, while the efficacy of PEO decreased 15 days after application. Our results suggest that NFO of C. zeylanicum can be used as an effective new tool for the management of P. operculella.
      PubDate: 2017-08-25
      DOI: 10.1007/s12230-017-9603-3
  • Nitrogen and Phosphorus Use Efficiency in Improved Potato ( Solanum
           tuberosum L.) Cultivars in Southern Ethiopia
    • Authors: Gebru Hailu; Dechassa Nigussie; Mohammed Ali; Belew Derbew
      Abstract: Abstract Use of nutrient efficient crop species or cultivars within species in combination with improved crop production practices offer the best option for meeting the future food requirements of growing world populations. Efficiency improvement has a key role for nutrient use and it improves both productivity of yield and minimizes risks of losses that potentially harm the environment. To improve nutrient use efficiency (NUE), one strategy is to select cultivars of crops with high NUE. Both nitrogen (N) and phosphorus (P) are among essential macronutrients commonly applied to agricultural crops to optimize yields. Evaluation of potato cultivars with high N and P efficiency is essential for sustainable production of the crop. In Ethiopia, however, little research has been done to elucidate better NUE of potato crop until recently. This study was, thus, designed to evaluate selected potato cultivars (Belete, Gudene, Jalene, Marachere and one local check) for NP use efficiency under low levels of the nutrients in Wolaita Sodo University, Ethiopia during 2014 and 2015. Factorial combination of 3 levels of each N (0, 55.5 and 111 kg N ha−1 ) and P (0, 19.5 and 39 kg P ha−1 ) were assigned to the main plots and the 5 cultivars to subplots of split-plot design in three replications. Efficiency indices such as agronomic efficiency, physiological efficiency and recovery efficiency were computed for combined NP nutrients. Results showed that agronomic nitrogen use efficiency, apparent phosphorus use efficiency and phosphorus use efficiencies were significantly influenced by the interaction effect of rates of NP nutrition and variety. Application of NP more than 55.5:19.5 kg ha−1 will not beneficial due to their less or equal use and recovery efficiencies to 55.5:19.5 kg NP ha−1. Belete was the most NP efficient variety followed by Jalene and Gudene in all efficiency indices. Therefore, Belete, Jalene and Gudene return better for NP at 55.5:19.5 kg ha−1 for economical use of fertilizes while obtaining satisfactory yield. It can be concluded that yield response variation of the varieties was related to their differences in NP uptake and use efficiencies; and the improved potato varieties were superior to local check in using NP nutrients efficiently.
      PubDate: 2017-08-15
      DOI: 10.1007/s12230-017-9600-6
  • Mini-Ridge with Covering and Side Planting Method Enhances Rainwater
           Collection and the Yield of Rain-fed Potato
    • Authors: Yang Chen; Ziyi Zhang; Zhong Ma; Liguo Jia; Yonglin Qin; Mingshou Fan
      Abstract: Abstract To improve potato yield in the Yinshan hilly area in Inner Mongolia of China, we implemented a novel cultivation method, i.e., the mini-ridge with covering and side planting (MCSP), based on local meteorological conditions and soil characteristics, and the growth and developmental process of potato. Data from four years of field experiments and laboratory simulation indicate that: 1) the yield of rain-fed potato under the MCSP method increased significantly, by 34% and 48% over yields obtained from the traditional methods of flat cultivation with covering (FC), and flat cultivation with no covering (FNC), respectively; 2) Compared to the FC and FNC methods, MCSP increased the rain water productivity by 15–53% and 28–74%; 3) MCSP increased water content in the top 20 cm of soil, and changed the distribution pattern of soil water by enhancing its vertical movement while reducing its lateral transport, thereby concentrating soil water into the root zone for improved root development.
      PubDate: 2017-08-04
      DOI: 10.1007/s12230-017-9598-9
  • Nitrogen Response of French Fry and Chip Cultivars Selected for Low Tuber
           Reducing Sugars
    • Authors: Na Sun; Carl J. Rosen; Asunta L. Thompson
      Abstract: Abstract New cultivars ‘Alpine Russet’, ‘Dakota Trailblazer’ and ‘Ivory Crisp’ have lower tuber reducing sugars and acrylamide-forming potential. Adoption of new cultivars by growers requires information about their responses to agronomic factors such as nitrogen (N) fertilizer. The objective of this study was to determine the effect of N rate on yield and quality of new cultivars relative to conventional cultivars ‘Russet Burbank’ and ‘Snowden’. The experiment was conducted over two years as a randomized complete block design replicated four times with five N rates and five cultivars. The new cultivars had comparable or higher marketable yields, and a higher percentage of large tubers (greater than170 g) than the standard cultivars. Total and marketable yields responded quadratically to N and optimized at 231 kg ha−1 in 2011 and 319 kg ha−1 in 2012 for all cultivars. ‘Dakota Trailblazer’ had high hollow heart incidence (greater than 10% at N rates above 125 kg ha−1), and excessively high specific gravity, making it undesirable for processing but with potential to be a parent in a breeding program. ‘Alpine Russet’ and ‘Ivory Crisp’ had specific gravity suitable for commercial processing, and low hollow heart incidence at all N rates. Critical petiole nitrate-N concentrations 50 and 70 days after planting for all cultivars were greater in 2012 than in 2011, suggesting that interpretation of critical values can be affected by growing conditions.
      PubDate: 2017-08-04
      DOI: 10.1007/s12230-017-9599-8
  • Genetic Diversity and Core Collection for Potato ( Solanum tuberosum L.)
           Cultivars from Cameroon as Revealed by SSR Markers
    • Authors: Mariette Anoumaa; Nasser Kouadio Yao; Eric Bertrand Kouam; Gabriel Kanmegne; Eunice Machuka; Sarah Karen Osama; Inosters Nzuki; Yanick Borel Kamga; Théophile Fonkou; Dénis Ndoumou Omokolo
      Abstract: Abstract Twelve pairs of SSR markers were used to evaluate the genetic diversity of 138 accessions of potato cultivars from the Western Highlands region of Cameroon. The average Polymorphism information content (PIC) value (0.74) and number of alleles (7.08) indicated a high genetic diversity of the potato cultivars tested. Analysis of molecular variance revealed that most of the genetic variations are found within geographic region (≥ 91%), resulting in high gene flow (Nm > 4 individuals). Local varieties had significantly more alleles than exotic varieties. Genetic diversity estimates for accessions from low elevations were significantly lower than those from medium and high elevations. Cluster analysis showed three clusters; the model-based approach inferred two gene pools. Genotypes revealed a high level of admixture between gene pools within locations and elevations. A core collection identified in this study composed of 27 individuals representing 19.57% of the whole collection and captured 99.15% of the total alleles found.
      PubDate: 2017-05-09
      DOI: 10.1007/s12230-017-9584-2
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