Stability Analysis in Peanut (Arachis hypogaea L.) for Kernel Yield and its contributing traits

Abstract

A field experiment was carried out with twenty six lines across seasons namely, summer 2020, kharif 2020 and rabi 2020-21 to study G × E interaction. The ANOVA of Eberhart and Russell model revealed significant differences among genotypes for all traits which indicates the presence of substantial variation in the per se performance of all the 26 peanut genotypes. Significant differences due to environments were observed for all traits except for shelling percentage and palmitic acid content indicating that the environments in which the genotypes evaluated were quite variable. The environments + (genotypes × environments) interaction was also observed to be significant for all traits studied except for 100 seed weight and palmitic acid content indicating considerable interactions of genotypes with environments (seasons). Significant genotype × environment interactions were recorded for all traits except for days to 50% flowering, days to maturity and 100 seed weight which inferred that differential performance of peanut genotypes under diverse environments. Plant height, number of primary branches per plant, number of secondary branches per plant, number of mature pods per plant, pod yield per plant, kernel yield per plant, sound mature kernel per cent and 100 seed weight were recorded higher positive values of environmental index in kharif season indicating that kharif season was congenial for most of the yield contributing traits than summer and rabi seasons. Genotypes viz., ICGV 171334, ICGV 98432 and ICGV 99105 were observed to be stable across the seasons for high pod and kernel yield in conjunction with confectionary traits like 100 seed weight, protein content and oleic linoleic acid ratio.