Genotype x environment interactions for yield and yield contributing traits in Urdbean (Vigna mungo L.)

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Date
2021-12
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Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu
Abstract
The present investigation entitled “Genotype x environment interactions for yield and yield contributing traits in Urdbean (Vigna mungo L.)” was conducted during Kharif 2020 at the Research Farm, Chatha, Arid Centre for Rainfed Agriculture, Rakhdhiansar and Pulses Research Sub-Station, Samba for estimating genetic parameters, to outline the association of grain yield with yield contributing traits and to carryout stability analysis. RBD statistical experimental design was used to partition the variance into different components.The presence of significant genetic variation was revealed by analysis of variance among urdbean genotypes in each environment.Pooled estimates of components of genetic variance revealed that phenotypic variance was relatively higher than genotypic variance for all the morpho-physiological traits implying the role of the environment in the expression of such traits studied. High heritability coupled with high genetic advance as percentage of mean was observed for number of primary branches per plant, number of clusters per plant, number of pods per cluster, number of pods per plant, pod length, number of seeds per pod, 1000 grain weight,grain yield per plant, biological yield per plant and harvest index indicating that these parameters are governed by additive-gene action and direct selection is effective for improving such traits. Grain yield per plant was positively and significantly correlated with number of primary branches per plant, number of clusters per plant, number of pods per cluster, number of pods per plant, number of seeds per pod, pod length, test weight, biological yield and harvest index which revealed the importance of these characters in determining the grain yield per plant. G × E interactions were found to be significant for all characters studied and stability analysis was done as per the Eberhart and Russell (1966) model. Genotypes PLU499-52 and STTZ834 had higher means than general mean and regression coefficient greater than unity and were stable and suitable for high performance environments for grain yield per plant. Genotypes Mash338 and PU31 with higher mean than general mean combined with regression coefficient closer to unity, and non-significant deviation from linear regression were observed to be stable and suitable for all environments for grain yield per plant.
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Preferred for your work. Aman 2021. Genotype x Environment Interactions for Yield and Yield Contributing Traits in Urdbean (Vigna mungo L.). M.Sc. Thesis, SKUAST-Jammu
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