for Journals by Title or ISSN
for Articles by Keywords
help
Followed Journals
Journal you Follow: 0
 
Sign Up to follow journals, search in your chosen journals and, optionally, receive Email Alerts when new issues of your Followed Jurnals are published.
Already have an account? Sign In to see the journals you follow.
Journal Cover   Journal of Plant Breeding and Genetics
  [9 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2308-121X - ISSN (Online) 2305-297X
   Published by eSci Journals Publishing Homepage  [8 journals]
  • YIELD COMPONENTS ANALYSIS AND HERITABILITY OF AGRONOMIC TRAITS AMONG SOME
           ACCESSIONS OF SORGHUM IN GHANA

    • Authors: Daniel Nyadanu, Eric Dikera
      Pages: 101 - 107
      Abstract: Sorghum (Sorghum bicolor L. Moench) is an important staple food crop in Ghana. It is used to prepare ‘tuo zaafi’, porridge and cake and to brew local beer known as ‘pito’.  Unfortunately, sorghum attracts limited research attention to improve its low productivity which is of great disincentive to farmers. Understanding of yield and its components in sorghum is needed to improve the yield of existing local varieties. A study was carried out under field conditions in Navrongo in the Kassena-Nankana district of the Upper East region of Ghana using four local accessions of sorghum; Banina, Kadaga, Naga red and Kapala to investigate yield and its components and their genetic parameters. There were significant (P<0.05) differences in yield traits among the accessions. High values for phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were recorded for harvest index and number of grains per panicle. High heritability and high genetic advance (GA) were observed for number of days to flowering, number of primary panicles, grain weight per panicle, and days to maturity. Banina variety produced the highest number of leaves, panicle height, panicle width, plant height, number of grains per panicle, grains weight, economic and biological yield. There were also significant and positive correlation among most of the characters studied. Principal components analysis revealed that Banina was the highest yielding accession and number of grains per panicle was the principal contributing factor of this accession.
      PubDate: 2015-07-11
      Issue No: Vol. 2, No. 3 (2015)
       
  • GENOTYPIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE IN ETHIOPIAN
           MUSTARD (BRASSICA CARINATA A.BRAUN.) GENOTYPES AT NORTHWESTERN ETHIOPIA

    • Authors: Tesfaye W. Mekonnen, Adugna Wakjira, Tsige Genet
      Pages: 109 - 114
      Abstract: The assessment of genetic variability is fundamental for the purpose of to identify the most important traits in Ethiopian mustard breeding program. The objective of the study was to estimate variability, heritability and genetic advance on thirty six morphological characters of Ethiopian mustard (Brassica carinata) genotypes were evaluated Adet Agricultural Research Center, Ethiopia. The experiment was laid out in simple lattice design. ANOVA of the experiment showed highly significant (p<0.01) for Day of maturity, grain filling period, number of pod per plot, secondary branches  per plant, harvest index, seed yield per plot, seed yield per hectare and oil content. Significant differences (p<0.01) were noted for day of flowering, plant height, primary branch per plant, biomass per plot, oil yield per plot. High phenotypic coefficient of variation (PCV) was recorded for days to flowering, grain filling period, plant height, secondary branches per plant, harvest index, oil yield per plot, seed yield per plot and hectare. The magnitudes of PCV and genotypic coefficient of variation (GCV) were high for grain filling period, plant height and secondary branches per plant. Heritability estimates were high for days to maturity, grain-filling period, days to flowering, plant height, biomass per plot, secondary branches per plant, primary branches per plant, oil content and oil yield per plot. High heritability was coupled with high genetic advance as percent of mean for plant height, grain filling period, secondary branches per plant were recorded. The study showed that there are variation in the extent of genetic variability, heritability and genetic advance in traits under study which can facilitate selection for further improvement of important traits of Ethiopian mustard.
      PubDate: 2015-07-11
      Issue No: Vol. 2, No. 3 (2015)
       
  • MORPHOLOGICAL DIVERSITY OF ETHIOPIAN LINSEED (LINUM USITATISSIMUM L.)
           LANDRACE ACCESSIONS AND NON-NATIVE CULTIVARS

    • Authors: Mulusew F. Ali, Firew Mekbib, Adugna Wakjira
      Pages: 115 - 124
      Abstract: Understanding the genetic diversity of linseed (Linum usitatissimum L.) is important for the continued improvement of this crop as well as for its development in the agricultural system. Therefore, to generate adequate information on genetic diversity of linseed, 49 sample accessions collected from five regions of Ethiopia along with 15 cultivars were used in this study with the objectives of investigating the morphological diversity between and within germplasm. Experiment was conducted at Sinana Agricultural Research Center, South Eastern Ethiopia. Treatments were arranged in 8 x 8 simple lattice square design with two replications. The Agro-morphological data were subjected to the analysis of variance. Highly significant variation for all the characters except for number of seeds per capsule and biomass. Clustering pattern and correlation matrix among and within Ethiopian linseed landraces and non-native cultivars were discussed. Furthermore, there were ample variations between and within Ethiopian linseed landraces and non-native cultivars, implying high chances for current and future genetic improvements in which desirable traits could be incorporated to new cultivars.
      PubDate: 2015-07-11
      Issue No: Vol. 2, No. 3 (2015)
       
  • PERFORMANCE OF COWPEA LINES TO THRIPS ATTACK IN OGBOMOSO AGRICULTURAL ZONE
           OF NIGERIA

    • Authors: Aremu B. Rhoda, Adegbite A. Emmanuel, Babalola O. Oluranti
      Pages: 125 - 130
      Abstract: Thirty four lines of cowpea were evaluated for their resistance to flower thrips. Selections were based on the ability of cowpea lines to produce peduncles and pods, the numbers of peduncles and pods produced per plants under thrips attack. Based on the performance of the lines during the first evaluation, fourteen lines were selected for the second rating. At the end of the second evaluation ten lines comprising four IITA lines and six landraces were identified to show good performance in resistance to thrips attack. These lines are: IT90K-277-2, TVu3629, TVu13685, TVu1509, BK-2K-05N, BK-2K-02RD, ID2K-05IM, BK-2K-011RP, ID2K-02M, ID2K-01M. These lines identified or selected for good performance can be used for further breeding work for cowpea improvement or recommended to farmers to reduce their cost on insecticides.
      PubDate: 2015-07-11
      Issue No: Vol. 2, No. 3 (2015)
       
  • GENOTYPIC VARIABILITY ESTIMATES OF AGRONOMIC TRAITS FOR SELECTION IN A
           SWEETPOTATO (IPOMOEA BATATAS) POLYCROSS POPULATION IN PAPUA NEW GUINEA

    • Authors: Boney Wera, Abner Yalu, Akkinapally Ramakrishna, Myla Deros
      Pages: 131 - 136
      Abstract: Successful crop breeding program incorporating agronomic and consumer preferred traits can be achieved by recognizing the existence and degree of variability among sweetpotato (Ipomoea batatas, (L.) Lam.) genotypes. Understanding genetic variability, genotypic and phenotypic correlation and inheritance among agronomic traits is fundamental to improvement of any crop. The study was carried out with the objective to estimate the genotypic variability and other yield related traits of highlands sweetpotato in Papua New Guinea in a polycross population. A total of 8 genotypes of sweetpotato derived from the polycross were considered in two cycles of replicated field experiments. Analysis of Variance was computed to contrast the variability within the selected genotypes based on high yielding β-carotene rich orange-fleshed sweetpotato. The results revealed significant differences among the genotypes. Genotypic coefficient of variation (GCV %) was lower than phenotypic coefficient of variation (PCV %) for all traits studied. Relatively high genetic variance, along with high heritability and expected genetic advances were observed in NMTN and ABYield. Harvest index (HI), scab and gall mite damage scores had heritability of 67%, 66% and 37% respectively. Marketable tuber yield (MTYield) and total tuber yield (TTYield) had lower genetic variance, low heritability and low genetic advance. There is need to investigate correlated inheritance among these traits. Selecting directly for yield improvement in polycross population may not be very efficient as indicated by the results. Therefore, it can be conclude that the variability within sweetpotato genotypes collected from polycross population in Aiyura Research Station for tuber yield is low and the extent of its yield improvement is narrow.
      PubDate: 2015-07-11
      Issue No: Vol. 2, No. 3 (2015)
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2015