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Articles by Amsalu Ayana
Total Records ( 2 ) for Amsalu Ayana
  Zerihun Jalata , Amsalu Ayana and Fekadu Fufa
  The aim of this study was to assess yield stability and disease responses of barley landraces and crosses. Sixteen barley landraces including crosses were tested across eleven environments in randomized complete block design in four replications in Bale highlands of Southeastern Ethiopia. GGE (i.e., G = Genotype, GE = genotype x environment, interaction) biplot procedure was used for graphical display of yield data after subjecting genotype means of each environment to GGE biplot software. The severity of barley leaf rust disease reaction was measured from 0-100 scale, while net blotch disease was scored using double digit scoring (00-99) system. Analysis of variance revealed that barley yields were significantly (p<0.01) influenced by environment (71.3%) followed by GEI (9.0%) and genotype (4%). Barley cross lines (G13, G9, G12, G7 and G8) were desirable in high yielding and stability. G13 (Aruso/EH956/F2-8H-6-4SNRFBC99G0003-21) which showed superior performances in yield and other desirable agronomic traits have been released in 2011 with a common name ‘Abdanne ’ for commercial production in Mid highlands of Bale. None of the breeding materials showed resistance to net blotch and barley leaf rust diseases whereas landrace selections showed poor yield performance as compared to the barley crosses. The result indicates that the use of local cultivars in barley crossing program as sources of genes is highly important to improve the yielding potential of barleys.
  Tilahun Wondimu , Sentayehu Alamerew , Amsalu Ayana and Weyessa Garedew
  Forty nine anchote landrace populations collected from South and Western parts of Ethiopia were evaluated for 17 pheno-morphic and agronomic traits of yield and yield related traits in simple lattice design at Bako Agricultural Research Center during 2011 cropping season. The objectives of the study were to classify the population into relatively homogenous group and to identify the major traits contributing to the overall diversity of the population. The data were subjected to D2 analysis and the populations were clustered in to 5 different major groups according to their similarity levels and this makes the accessions to become moderately divergent. This dataset was reduced to three significant Principal Components (PCs) that cumulatively explained 93.50% of the variance. About 56.30% of the variance accounted for by the first PC alone resulted largely from the variations in contrasting effects of discriminatory traits like fruit yield per plant, fruit length, fruit weight, fruit diameter, hundred seed weight, petiole length, number of fruit per plant, leaf length, average root length, internodes length, vine length and root yield per plant. Overall, the study confirmed the presence of character diversity in anchote landraces. This assessment of traits diversity can assist geneticist and breeders to identify populations with desirable characteristics for inclusion in variety breeding program. Further evaluation at multi-location is suggested in the future.
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