Vegetos

Abstract

The present investigation was carried out at Vegetable Experimental Farm, Division of Vegetable Science & Floriculture, Sher-e-Kashmir University of Agricultural Sciences and Technology, Jammu during 2013–14 and 2014–15 to assess the performance of genotypes across seasons and years for their adaptability and tolerance to various biotic stress traits under wide range of environments through phenotypic stability studies using Eberhart and Russel regression model (1966). Twenty five brinjal genotypes (10 F’1s and 15 OP varieties) were evaluated for fruit yield and prevalent biotic stress traits under six environments comprising of six different seasons viz., E1: autumn-winter 2013; E2: spring-summer 2014; E3: rainy, 2014; E4: autumn-winter, 2014; E5: spring-summer, 2015 and E6: rainy, 2015. Significant genotypes × environment interaction for all the traits provides an opportunity for selecting suitable genotypes with high mean for the trait of interest except non-significant mean square value in little leaf incidence which means less variation and least scope of selection for this trait. The portioning of environments + (genotypes × environments) mean squares showed that environments (linear) differed significantly and were quite diverse with regards to their effect on the performance of the genotypes for fruit yield and all the biotic traits. Simultaneous analysis of stability parameters (μ, bi and S2di) revealed three genotypes viz., PPL-74, Shamli and Punjab Sadabahar as stable genotypes capable of giving consistent performance. One genotype Pusa Kranti has been found stable against fruit borer as well as phomopsis blight disease.