Genotype x environment interaction and stability analysis for yield traits in chickpea (Cicer arietinum L.)
The present investigation was carried out during Rabi 2016-17 at five different locations in Chhattisgarh to determine the stability for days to 50% flowering, days to maturity, plant height, pods per plant, 100-seed weight (g) and seed yield (kg/ha). Analysis of variance revealed significant mean squares due to genotypes for all the traits indicated significant differences among the means. Mean squares due to Genotypes x Env. (linear) were significant for pods/plant and seed yield indicated that the varieties differed genetically for their regression on the environmental index and hence the performance is predictable in nature for pods/plant and seed yield. Mean squares due to individual variety have been tested against pooled error for the traits days to 50% flowering, days to maturity, plant height and 100-seed weight that exhibited significant mean squares due to pooled deviation. Mean squares due to pooled deviation were significant but mean squares due to Genotypes x Env. (linear) for days to 50% flowering, days to maturity, plant height and 100-seed weight indicated that variation in the performance of varieties is entirely unpredictable and hence varieties may perform better in the favorable environment for the traits. In the present investigation, varieties which showed significant regression tested for bi-0 for the traits were near to unity except for 100-seed weight in RG 2009-16, RG 2009-20 and RG 2010-11-1 which exhibited regression significantly differed to the unity (1-bi). For plant height varieties RG 2009-16 and RG 2015-08 exhibited high mean, regression coefficient near to unity and deviation from regression near to zero, hence may be considered as stable for the trait.
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