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AGRICULTURE (662 journals)            First | 1 2 3 4     

Showing 601 - 263 of 263 Journals sorted alphabetically
Rural Sustainability Research     Open Access   (Followers: 2)
RURALS : Review of Undergraduate Research in Agricultural and Life Sciences     Open Access   (Followers: 1)
SAARC Journal of Agriculture     Open Access  
Sabaragamuwa University Journal     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Savana Cendana     Open Access  
Savannah Journal of Research and Development     Open Access  
Science and Technology Indonesia     Open Access  
Science as Culture     Hybrid Journal   (Followers: 12)
Science, Technology and Arts Research Journal     Open Access   (Followers: 1)
Scientia Agricola     Open Access  
Scientia Agropecuaria     Open Access  
Seed Science and Technology     Full-text available via subscription  
Seed Science Research     Hybrid Journal  
Selçuk Tarım ve Gıda Bilimleri Dergisi     Open Access  
Semiárida     Open Access  
Siembra     Open Access  
Small Ruminant Research     Hybrid Journal   (Followers: 2)
Smart Agricultural Technology     Open Access  
Social & Cultural Geography     Hybrid Journal   (Followers: 26)
Social and Natural Sciences Journal     Open Access  
South African Journal of Agricultural Extension     Open Access   (Followers: 3)
South African Journal of Economics : SAJE     Hybrid Journal   (Followers: 7)
South African Journal of Plant and Soil     Hybrid Journal   (Followers: 1)
Spatial Economic Analysis     Hybrid Journal   (Followers: 10)
Sri Lanka Journal of Food and Agriculture     Open Access   (Followers: 1)
Stiinta Agricola     Open Access  
Studies in Australian Garden History     Full-text available via subscription   (Followers: 5)
Sugar Tech     Hybrid Journal   (Followers: 1)
Sustainability Agri Food and Environmental Research     Open Access   (Followers: 4)
Sustainability and Climate Change     Full-text available via subscription   (Followers: 25)
Sustainable Agriculture Research     Open Access   (Followers: 3)
Sustainable Environment Agricultural Science (SEAS)     Open Access  
Tanzania Journal of Agricultural Sciences     Open Access   (Followers: 4)
Terra Latinoamericana     Open Access  
The Agriculturists     Open Access  
The Journal of Research, PJTSAU     Open Access   (Followers: 10)
Translational Animal Science     Open Access  
Trends in Agricultural Economics     Open Access   (Followers: 7)
Tropical Agricultural Research     Open Access   (Followers: 2)
Tropical Agricultural Research and Extension     Open Access   (Followers: 2)
Tropical and Subtropical Agroecosystems     Open Access  
Tropical Grasslands - Forrajes Tropicales     Open Access  
Tropical Technology Journal     Open Access  
Tropicultura     Open Access  
Turkish Journal of Agricultural and Natural Science / Türk Tarım ve Doğa Bilimleri Dergisi     Open Access  
Turkish Journal of Agricultural Engineering Research     Open Access   (Followers: 1)
Ukrainian Journal of Veterinary and Agricultural Sciences     Open Access  
Uluslararası Tarım ve Yaban Hayatı Bilimleri Dergisi / International Journal of Agricultural and Wildlife Sciences     Open Access  
UNICIÊNCIAS     Open Access   (Followers: 1)
Universal Journal of Agricultural Research     Open Access  
Universidad y Ciencia     Open Access  
Urban Agricultural & Regional Food Systems     Open Access   (Followers: 1)
Viticulture Data Journal     Open Access   (Followers: 1)
VITIS : Journal of Grapevine Research     Open Access   (Followers: 1)
Walailak Journal of Science and Technology     Open Access  
Wartazoa. Indonesian Bulletin of Animal and Veterinary Sciences     Open Access   (Followers: 1)
Weed Biology and Management     Hybrid Journal   (Followers: 4)
Weed Research     Hybrid Journal   (Followers: 5)
Welwitschia International Journal of Agricultural Sciences     Open Access   (Followers: 3)
West African Journal of Applied Ecology     Open Access  
Wildlife Australia     Full-text available via subscription   (Followers: 2)
Wirtschaftsdienst     Hybrid Journal   (Followers: 5)
World Journal of Agricultural Research     Open Access  
World Mycotoxin Journal     Hybrid Journal   (Followers: 3)
World's Poultry Science Journal     Full-text available via subscription   (Followers: 3)
علوم آب و خاک     Open Access  

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VITIS : Journal of Grapevine Research
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0042-7500 - ISSN (Online) 2367-4156
Published by Eugen Ulmer KG Homepage  [6 journals]
  • Vitis genetic resources: current challenges, achievements and perspectives

    • Authors: Thierry Lacombe
      Pages: 1 - 10
      Abstract: Management and knowledge of Vitis genetic resources aim to help address the multiple current and future challenges facing the professional sector: i) preservation of wild and cultivated grapevine heritage, ii) clonal selection of existing cultivars, iii) creation of new cultivars by hybridisation or other technologies, iv) progress in fundamental and applied sciences on all viticultural and oenological issues. It is therefore a vast field of study and actions that deals with all taxonomic levels within the Vitis genus (subgenus, species and their hybrids, cultivars and their variants, clones), in natural and cultivated environments, on all continents, both for fruit production (wine and table grapes) and for rootstocks. To meet the many expectations, different actors should ideally coordinate the following actions: 1) research and identification of sources of genetic diversity, 2) access, collection and sampling of this diversity, 3) ex situ and/or in situ conservation, 4) characterization, 5) dissemination of plant material and related information, 6) use of genetic resources by the different applicants. Following this outline, we will try to assess the challenges and achievements over the last 5-10 years, and discuss the perspectives of this disciplinary field taking into account elements of the wine-growing, scientific, institutional and regulatory context.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.1-10
      Issue No: Vol. 62 (2023)
       
  • Grapevine genetic resources of Armenia: molecular fingerprinting and
           phylogenetic relationship among wild and cultivated grapevine

    • Authors: Kristine Margaryan, Boris Gasparyan, Artur Prtrosyan, Frunz Harutyunyan, Reinhard Töpfer, Erika Maul
      Pages: 11 - 22
      Abstract: Armenia is characterized by a high diversity of cultivated (Vitis vinifera L. subsp. Vinifera) and wild (Vitis vinifera L. subsp. sylvestris) grapes. The country has played a leading role in the centuries-lasting history of grapevine cultivation in the Near East. Varying climatic conditions and the existence of wild grapes lead to the formation and promotion of viticulture and winemaking, as evidenced by nearly 450 autochthonous varieties. Hundreds of unique indigenous cultivars are still preserved in old vineyards and abandoned gardens, though most of them are threatened by extinction. Wild grapes, thriving along riverbanks, climbing the rocks and embracing the trees can be found in Vayots Dzor, Tavush, Syunik provinces and in Artsakh. With the main goal to estimate the phylogenetic relationships among Armenian wild grapes and indigenous cultivars, and evaluating the possible contribution of wild grapes to the genetic makeup of indigenous cultivars, we analyzed 79 unique cultivars and 111 putative wild plants, collected from different viticulture regions, with 24 nSSR markers. The genetic diversity analysis conducted for wild grapes and indigenous cultivars unfolded the allelic richness of wild and cultivated gene pools and surprisingly for us revealed the absence of significant differences for all genetic parameters between the two subspecies. Moreover, the results registered for the number of different alleles (Na), effective number of alleles (Ne), and Shannon’s information index (I) have shown comparatively high values for wild grapes, while the observed negative value of Fixation index (F) for indigenous cultivars mirrored an abundance of heterozygote genotypes presuming random mating. The neighbour-joining (NJ) cluster analysis indicated a clear separation between the two subspecies vinifera and sylvestris and formed two main clusters. Applied non-hierarchical horizontal clustering using Structure software assigned the 190 genotypes into two clusters. The delta K criterion (ΔK) suggested K = 2 as the optimal uppermost hierarchical level of structure. Obtained results were comparable with the NJ cluster analysis and confirmed the divergence of sylvestris from vinifera, indicating a clear separation between the two subspecies. Meanwhile, results highlighted the role of gene flow between wild grapes and cultivars through observed overlaps and admixed ancestry values. Grapevine genetic resources of Armenia can contribute to overcoming biotic and abiotic stresses and better adaptation to climate change.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.11-22
      Issue No: Vol. 62 (2023)
       
  • Analysis of Croatian wild and cultivated grapevine diversity by genotyping
           by sequencing

    • Authors: Luka Marinov, Goran Zdunić, Gabriele Di Gaspero, Gabriele Magris, Michele Morgante, Katarina Lukšić, Katarina Hančević, Edi Maletić, Marijan Bubola, Ivan Pejić
      Pages: 23 - 29
      Abstract: Minor varieties represent a significant part of the grapevine germplasm (Vitis vinifera L. subsp. vinifera) in Croatia. During the long history of grape cultivation in insular, coastal and continental Croatia, numerous local varieties were cultivated, many of which are still used today. There are also several populations of wild grapevine (Vitis vinifera subsp. sylvestris Hegi Gmel) that have survived until the present in natural sites. Here, we developed a single primer enrichment technology (SPET) panel consisting of 61,308 probes for targeted sequencing of the V. vinifera gene space. In doing so, we examined a total of 28,092 gene models, 88.2% of all predicted genes, interrogating an average of 19 Mb nucleotides per individual genome, which corresponds to 4% of the haploid genome length. This is the first time that SPET-based sequencing has been applied to Croatian grapevine germplasm to generate multilocus genotype data of 126 cultivated accessions and 50 wild specimens. We identified 531,900 variants sites, 208,802 of which reside in coding sequences, 140,836 in introns, 118,416 in UTRs, and 63,424 in the nearby intergenic space that revealed the presence of 33 clonally propagated specimens representing both synonymies and clones within local varieties (22) as well as synonymies between local and international varieties (11), mostly from neighbouring countries. To investigate possible contribution of wild grapevine (Vitis vinifera subsp. sylvestris Hegi Gmel) to the development of present cultivars, four wild grapevine populations were included. None of the cultivated varieties showed close kinship with local wild specimens. This study opens new possibilities for studying the genetic diversity of Croatian grapevine germplasm and provides additional information with respect to SSR genotyping and phenotyping.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.23-29
      Issue No: Vol. 62 (2023)
       
  • Two main distinct evolutionary stories describe the Italian grapevine
           assortment

    • Authors: Manna Crespan, Francesco Mercati, Gabriella De Lorenzis, Claudio D'Onofrio, Francesco Sunseri
      Pages: 30 - 36
      Abstract: A dataset of high-quality 7k SNP profiles of 1,038 unique Eurasian grapevine varieties was used to infer the most likely grapevine migration events, a spatial ancestry estimation, and a model about the origin of Eurasian grapevine germplasm. The comparison of putative gene flow scenarios from Caucasus throughout Europe aided to fit the more reliable spreading routes around the Mediterranean Basin. The same dataset was also used to assess the population genetic diversity, structure, and relatedness of Italian varieties. These data suggested a different history between Northern and Southern Italian grapevines, appearing clearly split into two different clusters. Interestingly, the Italian genotypes were shown to be distinguishable from all the other Eurasian populations for the first time. The same SNP panel was used to determine parental relationships, identifying the main parents of traditional Italian and closely related cultivars. The parentage network suggested that Italian germplasm largely originated from a few key parents distributed into several geographical areas of genetic influence, with more or less large overlaps. These key cultivars are ‘Bombino bianco’, ‘Garganega’/‘Grecanico’, ‘Mantonico bianco’, ‘Orsolina’/‘Coccalona nera’, ‘Muscat à petits grains blanc’, ‘Malvasia odorosissima’, ‘Sangiovese’, ‘Sciaccarello’, ‘Visparola’ and ‘Vulpea’. The pedigree reconstruction by fullsib and second-degree relationships highlighted the pivotal role of some cultivars, such as ‘Visparola’, until now scarcely known. A hypothetic migration of this variety from Southern to Northern Italy along the Eastern side, as well as ‘Sangiovese’ migration from Southern to Central Italy along the Western side might be supposed. Moreover, ‘Muscat à petits grains blanc’, mainly through its offspring ‘Malvasia odorosissima’, furnished a consistent contribution to the development of many aromatic grapes grown in the Northern-Western part of the Italian Peninsula. These results represent the most complete study of grapevine Italian population genetics that has been carried out until now on the Italian germplasm.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.30-36
      Issue No: Vol. 62 (2023)
       
  • Dissecting foliar physiology and chemical properties with integrated
           highthroughput phenotyping and molecular markers in grape improvement

    • Authors: Ugochukwu Ikeogu, Kaitlin M. Gold, John Couture, Nikita Gambhir, Robetauli Simangunsong, Surya Sapkota, Michael Colizzi, Lance Cadle-Davidson, Bruce I. Reisch
      Pages: 37 - 40
      Abstract: An advanced phenotyping protocol using a hyperspectral spectrometer to better understand foliar chemical composition and physiological processes in relation to grapevine yield, quality, biotic and abiotic resistance was initiated with in-house and public spectral resources. The initial result for foliar pigments calibration was promising for classification and measurements to support breeding. We demonstrated the potential of adapting public spectral resources in supporting modern phenotyping in programs with limited resources and when combined with our current effort in deploying marker-assisted selection, the dual innovations provide new information to fast-tracking grapevine research and trait improvement.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.37-40
      Issue No: Vol. 62 (2023)
       
  • PHENOquad: A new multi sensor platform for field phenotyping and screening
           of yield relevant characteristics within grapevine breeding research

    • Authors: Hannes Engler, Pascal Gauweiler, Florian Huber, Julius Krause, Benedikt Fischer, Benedikt Hoffmann, Petra Schumacher, Artem Yushchenko, Robin Gruna, Volker Steinhage, Katja Herzog, Reinhard Töpfer, Anna Kicherer
      Pages: 41 - 48
      Abstract: Balanced and stable yield is a major trait in grapevine breeding and breeding research. Grapevine yield hereby is a complex quantitative trait, as it is influenced by multiple plant parameters, like berry size, number of berries per bunch, number of bunches per shoot, management, and environmental factors. In the current breeding process, the complexity of this trait has shown that a classification according to descriptive factors for marker development is only possible to a limited extent. Precise field phenotyping of yield-related traits is the basic prerequisite to be able to measure such quantitative traits. This, however, is the major bottleneck due to labor, time and constrains of plant material in the breeding process. For this reason, one of our main goals with the newly developed phenotyping platform PHENOquad with its multisensor system PHENOboxx is to improve phenotyping efficiency of grapevine yield to overcome the phenotyping bottleneck. The newly developed embedded vision system PHENOboxx is mounted on an "all-terrain vehicle (ATV)". This allows a fast data acquisition on a large number of individual vines. In order to evaluate the yield potential of breeding material in comparison to established grapevine cultivars, various yield-related parameters of the vines are quantified directly in the field with high spatial and temporal resolution. As key parameters for yield-related phenotyping, the number of shoots, bunches, berries and the weight of dormant pruning wood was identified. The image data acquired are annotated to train the artificial intelligence (AI). Within the process, the image analysis results are compared to annotated ground truth data and correlated with the field reference data. We expect to increase the precision, target specificity and throughput of screening grapevine material without reducing its accuracy over time by using the PHENOquad. In addition, a weighting of yield-relevant parameters would be possible. This opens up new possibilities for efficient plant evaluation in the scope of grapevine breeding. Also new application possibilities for precision viticulture are conceivable.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.41-48
      Issue No: Vol. 62 (2023)
       
  • Single berry development – a new phenotyping and transcriptomics
           paradigm

    • Authors: Stefania Savoi, Laurent Torregrosa, Charles Romieu
      Pages: 49 - 55
      Abstract: Most present knowledge on berry development has been obtained from a random sampling of hundreds of berries to average their diversity of the experimental plot. According to recent studies, such heterogeneous samples formed from non-synchronized berries of mixed developmental stages are unsuitable for detecting fast physiological and molecular changes. Thus, it is necessary to revisit the physiological and transcriptional bases of berry ripening. Here we report the in-depth study of the late-ripening program in three genotypes. Berry expansion during the second growth phase was characterized on-vine through image analysis. Hundreds of sampled berries were individually analyzed for primary metabolites to calculate their respective accumulation rates with high precision. These primary individual fluxes and the growth kinetics allowed us to distinguish targeted developmental stages further investigated through RNA profiling. Single berry monitoring evidenced sharp developmental phases during which specific genes or pathways are quickly switched ON or OFF. The comparison between Syrah and the two microvines showed phenotypic differences in late-ripening stages in vines grown in the field (Syrah) and microvines (MV032 and MV102) grown in the greenhouse. This study shows that new high-throughput single berry phenotyping methods are required to compare unambiguous developmental stages in physiological or genetic studies.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.49-55
      Issue No: Vol. 62 (2023)
       
  • Relationship between meteorological data, physical-mechanical
           characteristics of grapes and Botrytis bunch rot

    • Authors: Katja Herzog, Florian Schwander, Nele Schneider, Reinhard Töpfer
      Pages: 56 - 66
      Abstract: Botrytis bunch rot (BBR) is the economically third most important disease in cool climate viticulture. In order to avoid or delay spreading of BBR infections until the grapes reach physiological ripeness, different management strategies like early defoliation or specific fungicide applications were developed. The scope of most grapevine breeding programs is the selection of mildew fungus-resistant, climatic adapted grapevines with balanced, healthy yield and outstanding wine quality. Within the long-term breeding process, the application of marker-assisted selection (MAS) is the most efficient way for early selection of desired grapevine seedlings. Since no resistances have yet been described for BBR, grapevines shall be selected for developing fruits with physical-mechanical barriers reducing the risk for BBR infection like loose grape bunch architecture and thick, impermeable berry cuticle. In the present study first results regarding the investigation of the relationship between physical-mechanical fruit traits (bunch architecture, berry impedance and berry texture), meteorological data and the degree of BBR infection are shown. Varieties and elite breeding lines were phenotyped using high-throughput, objective sensors in 2021 and 2022, two years with contrasting growing conditions (Siebeldingen, Germany). In comparison to 2021, 2022 was characterized by a higher temperature sum D (+196°days between veraison and harvest) and huge differences in the precipitation sum (PS; -62 mm up to + 105 mm). In order to categorize BBR resistance/ susceptibility, berries from different genotypes showing high variability in their berry characteristics were sampled at maturity and were tested under controlled lab conditions for BBR susceptibility. For some varieties, it could be shown that meteorological conditions affect both, berry traits as well as infection with BBR. In addition to the environment and the training system, physical-mechanical berry traits and the mean berry diameter could be confirmed as promising phenotypic traits for the prediction of BBR resistance. In summary, the consideration of sensor-based physical-mechanical berry traits enables an improved risk prediction for BBR, which is of outstanding importance for the evaluation of breeding material and new varieties growing under different environmental conditions, as well as for phenotyping of mapping populations for QTL analyses and the development of molecular markers. As meteorological conditions were contrasting in 2021 and 2022 and varieties with high phenotypic variability were considered, additional years of investigations are recommended in order to verify the reliability of the detected relationships.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.56-66
      Issue No: Vol. 62 (2023)
       
  • Moving towards grapevine genotypes better adapted to abiotic constraints

    • Authors: Nathalie Ollat, Elisa Marguerit, Marina de Miguel, Aude Coupel-Ledru , Sarah Jane Cookson, Cornelis van Leeuwen, Philippe Vivin, Philippe Gallusci, Vincent Segura, Eric Duchêne
      Pages: 67 - 76
      Abstract: Vitis spp., both in their cultivated and wild forms, have been growing in a large diversity of environments for thousands of years. As a result, they have developed many adaptive mechanisms controlled by a range of regulatory processes. The cultivated species, Vitis vinifera, is quite well adapted to semi-arid conditions and its cultivation can be used to produce crops on marginal lands. However, this is threatened by climate change, which is associated with increased temperature and CO2 atmospheric content, changes in water availability and an increased likelihood of extreme events, such as heat waves and early spring frosts. Indirect effects of climate change on solar radiation and soil minerals are also expected. Consequently, cultivated grapevines will presumably face more abiotic constraints occurring concomitantly or successively over one or more growing cycles. In addition to climate change, worldwide viticulture must reduce the use of pesticides. Adapting to climate change and reducing pesticide use are challenging, and increase the need to create new grapevine varieties that are more resistant to diseases and better adapted to abiotic constraints. For this purpose, the adaptive mechanisms of wild and cultivated Vitis spp. must be exploited. While major advances have already been made in exploiting wild alleles for disease resistance, the polygenic nature of adaptation to abiotic factors has slowed down research progress. To tackle this limitation, ambitious integrative strategies need to be undertaken from collection and characterization of genetic resources, investigations on genetic architecture and identification of underlying genes (including those involved in epigenetic regulation), to the implementation of new breeding technologies and the development of genomic selection. An update on the state-of-the-art regarding these aspects is presented.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.67-76
      Issue No: Vol. 62 (2023)
       
  • Analysis of the Rpv12 locus in a haplotype‑separated grapevine
           genome sequence

    • Authors: Sophia Müllner, Bianca Frommer, Daniela Holtgräwe, Prisca Viehöver, Bruno Hüttel, Reinhard Töpfer, Bernd Weisshaar, Eva Zyprian
      Pages: 77 - 80
      Abstract: Plasmopara viticola, the grapevine downy mildew pathogen, causes severe losses in viticulture if not counteracted by fungicide sprays that need to be repeatedly applied during each growing season. To reduce the amount of plant protection, modern grapevine breeding generates fungus‑resistant grapevine cultivars by introgression of resistance loci from wild Vitis spec. sources. However, the presence of only a single resistance locus may provoke the emergence of pathogen races able to overcome the resistance trait of the host. Therefore, a combination of several, independently acting resistance loci is required for sustainable genetic resistance. Quite little is known about the resistance‑conferring genes within the various grapevine resistance loci. To ameliorate this situation and make stacking of resistance loci more efficient, the Rpv12 locus originating from the Asian Vitis amurensis was sequenced and characterized. The complete genome of breeding line Gf.99‑03, carrying Rpv12 in heterozygous state, was analyzed. Haplotypes were resolved by assigning the reads to one of the parents of Gf.99‑03 using trio binning. Annotation of the resulting genomic sequences was based on RNA-Seq data and predicted gene models. The haplotype carrying the Rpv12 locus, delimited by markers UDV‑014 and UDV‑370 on chromosome 14 (Venuti et al., 2013), diverges strongly from the susceptible haplotype as well as from the reference genome PN40024 12X.v2. It was found to contain two important gene clusters. One cluster includes pathogen-inducible genes similar to the gene ACCELERATED CELL DEATH 6 (A. thaliana) likely involved in hypersensitive response upon pathogen attack. The second cluster comprises positional resistance candidate genes corresponding to typical NLRs (nucleotide binding site, leucine rich repeats), hypothesized to be involved in pathogen perception and cellular defense signalling.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.77-80
      Issue No: Vol. 62 (2023)
       
  • Agronomic performance of 21 new disease resistant winegrape varieties
           grown in northeast Italy

    • Authors: Luigi Bavaresco, Alberto Vercesi, Paolo Belvini, Lorenzo Dalla Costa, Jacopo Fogal, Luana Marcon, Loredana Masaro, Giovanni Pascarella, Mattia Pastro, Angelo Pizzolato, Giacomo Traversari, Matteo Vianello, Bruno Zanatta, Michele Borgo, Daniele Carnio, Guiseppe La Malfa, Alessandro Leoni
      Pages: 81 - 87
      Abstract: The goal of the field trial was to evaluate the agronomic performance of 21 (10 red and 11 white) winegrape varieties obtained from recent breeding programmes for disease resistance developed in Hungary, Germany, and Italy. The tested red varieties were as follows: ‘Cabernet Carbon’, ‘Cabernet Eidos’, ‘Cabernet Volos’, ‘Julius’, ‘Merlot Khorus’, ‘Merlot Kanthus’, ‘Monarch’, ‘Prior’, UD. 31.103, ‘Vinera’. The tested white varieties were as follows: ‘Aromera’, ‘Bronner’, ‘Fleurtai’, ‘Johanniter’, ‘Muscaris’, ‘Souvignier Gris’, ‘Sauvignon Kretos’, ‘Sauvignon Nepis’, ‘Sauvignon Rytos’, ‘Solaris’, ‘Soreli’. ‘Merlot’ (red) and ‘Glera’ (white) were included as control. The experimental vineyard was established in Castelfranco Veneto on the plain, in 2014. Spray treatments were applied against downy and powdery mildew, by using only copper and sulphur. Grape production, grape quality, and phenology were recorded over a six-year-period, while disease resistance (downy mildew, powdery mildew, black rot and anthracnose) was detected only during a few years. The most significant findings were: a) all varieties showed a good level of downy mildew resistance, especially ‘Cabernet Carbon’, ‘Monarch’, ‘Prior’, UD 31.103, ‘Muscaris’, ‘Solaris’, ‘Souvignier Gris’, ‘Bronner’, ‘Fleurtai’, ‘Aromera’; b) no powdery mildew attacks were detected in any variety; c) ‘Monarch’, ‘Muscaris’, ‘Solaris’ and ‘Souvignier Gris’ also showed a high level of resistance towards black rot and anthracnose; d) red grape varieties had an earlier bud burst as compared to ‘Merlot’, and, concerning ripening, some varieties were earlier than ‘Merlot’, other ones were later; e) white varieties had a later bud burst but an earlier ripening time as compared to ‘Glera’; f) grape production and quality changed significantly depending on the varieties, being titratable acidity higher than 6.4 g L-1 tartaric acid and pH lower than 3.5; also the year affected in a significant way those parameters as well as the interaction between the genotype and the year. In conclusion, the tested varieties behaved positively in terms of environmental sustainability.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.81-87
      Issue No: Vol. 62 (2023)
       
  • Contributions of the VitisGen2 project to grapevine breeding and genetics

    • Authors: Bruce I. Reisch, Lance Cadle-Davidson, Ugochukwu Ikeogu, Gavin L. Sacks, Jason P. Londo, Tim E. Martinson
      Pages: 88 - 91
      Abstract: The VitisGen projects (2011-2022) have improved the tools available for breeding new grapevine cultivars with regional adaptation, high quality, and disease resistance. VitisGen2 (the second project in the series) was a multi-state collaboration (USDA-Geneva, New York; University of California, Davis; USDA-Parlier, California; Cornell University; Missouri State University; University of Minnesota; South Dakota State University; Washington State University; North Dakota State University; and E&J Gallo, California) to develop improved genetic mapping technology; to identify useful DNA marker-trait associations; and to incorporate marker-assisted selection (MAS) into breeding programs. A novel genetic mapping platform (rhAmpSeq) now provides 2000 + markers that are transferable across the Vitis genus. rhAmpSeq has been used in California, New York, Missouri, and South Dakota to identify new QTL for powdery and downy mildew resistance. In addition, fruit/flower traits that would normally take years to phenotype have been associated with predictive markers accessible from seedling DNA (e.g. malate metabolism, anthocyanin acylation, bloom phenology and flower sex). Since 2011, the project has used MAS to screen thousands of grape seedlings from public breeding programs in the United States and has produced “Ren- Stack” public domain lines to enable simultaneous access to 4 or 6 powdery mildew resistance loci from single source genotypes. High-throughput phenotyping for powdery and downy mildew resistance has been revolutionized with the Blackbird automated-imaging system powered by artificial intelligence for image analysis. Affordable DNA sequencing along with phenotyping innovations are transforming grapevine breeding.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.88-91
      Issue No: Vol. 62 (2023)
       
  • Do we need to consider grape phyllosphere microbiome in breeding
           schemes'

    • Authors: Patrice This, Prashant Singh, Sylvain Santoni, Jean-Pierre Péros
      Pages: 92 - 98
      Abstract: The aerial surface of the plant (phyllosphere) is the habitat of complex microbial communities. These communities may have profound effects on host plant health and its performance traits. When breeding new cultivars, i.e. the aerial component of a grape plant, one can simply ignore the phyllosphere in breeding schemes if its composition is mainly dependent on the environment. It is considered an important component if the genotype is the main driver of the phyllosphere composition. In order to answer this question, we have analysed several factors influencing the structure of the phyllosphere microbial community. Using amplicon sequencing of the 16S rRNA gene and of the internal transcribed spacer (ITS), we explored the microbial diversity at genus level for both bacteria and fungi present in the phyllosphere of leaves and grape berries. We analysed it on different grape taxonomic level (between five Vitis species or a set of Vitis vinifera cultivars chosen to represent the three genetic pools of the species), for different years and on five commercially important varieties of Vitis vinifera that were sampled from three different French terroirs. Our results indicated the presence of complex microbial diversity and assemblages in the phyllosphere. A significant effect of several factors (organ, grape species, growing year and terroir) on taxa abundance was observed with varying degrees of effect. At a given location, genotypes have an impact on microbial assemblage in the phyllosphere of leaf and berries, most pronounced on fruits but the effect of terroir was much stronger than the cultivar identity when the leaf phyllosphere of five grapevine varieties grown in different agro-climatic zones was compared. Limitations of the study as well as implied consequences of this work will be discussed.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.92-98
      Issue No: Vol. 62 (2023)
       
  • High quality phased assembly of grape genome offer new opportunities in
           chimera detection

    • Authors: Victoria Sichel, Gautier Sarah, Nabil Girollet, Valérie Laucou, Catherine Roux, Loïc Le Cunff, Patrice This, Pierre-François Bert, Thierry Lacombe
      Pages: 99 - 102
      Abstract: In perennial plants and especially those propagated through cuttings, several genotypes can coexist in a single individual, thus leading to chimeras. When the variant induces a noticeable phenotype modification, it can lead to a new cultivar. Viticulture already took economic advantage of this natural phenomenon: for instance, the berry skin of ‘Pinot gris’ derived from ‘Pinot noir’ by the selection of a chimera. Chimeras could also impact other crucial traits without being visually identified. Periclinal chimera where the variant has entirely colonized a cell layer is the most stable and can be propagated through cuttings. In grapevine, two functional cell layers are present in leaves, L1 and L2. However, lateral roots are formed from the L2 cell layer only. Thus, comparing DNA sequences of roots and leaves could allow chimera detection. In this study we used new generation Hifi long reads sequencing and recent bioinformatics tools applied to ‘Merlot’ to detect periclinal chimeras. Sequencing of ‘Magdeleine Noire des Charentes’ and ‘Cabernet franc’, the parents of ‘Merlot’, allowed haplotype resolved assembly. Pseudomolecules were built with few contigs, in some occasions only one per chromosome. This high resolution allowed haplotype comparison. Annotation from PN40024 was transferred to all pseudomolecules. Through variant detection, periclinal chimeras were found on both haplotypes. These results open new perspectives on chimera detection, which is an important resource to improve cultivars through clonal selection or breed new ones. Detailed results will be presented and discussed.
      PubDate: 2023-10-31
      DOI: 10.5073/vitis.2023.62.special-issue.99-102
      Issue No: Vol. 62 (2023)
       
 
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Rural Sustainability Research     Open Access   (Followers: 2)
RURALS : Review of Undergraduate Research in Agricultural and Life Sciences     Open Access   (Followers: 1)
SAARC Journal of Agriculture     Open Access  
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Science and Technology Indonesia     Open Access  
Science as Culture     Hybrid Journal   (Followers: 12)
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Selçuk Tarım ve Gıda Bilimleri Dergisi     Open Access  
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Small Ruminant Research     Hybrid Journal   (Followers: 2)
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Sri Lanka Journal of Food and Agriculture     Open Access   (Followers: 1)
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Studies in Australian Garden History     Full-text available via subscription   (Followers: 5)
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VITIS : Journal of Grapevine Research     Open Access   (Followers: 1)
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Wartazoa. Indonesian Bulletin of Animal and Veterinary Sciences     Open Access   (Followers: 1)
Weed Biology and Management     Hybrid Journal   (Followers: 4)
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