Phenotypic stability analysis in Brinjal over environments

The study was conducted during rabi-2021 (Jan, 2021-Feb, 2021) and late kharif (Sept, 2021-Feb, 2022) at JAU, Junagadh, Gujarat to study the G×E interaction and stable genotype over environments (Seven parents (GJB-2, GJB-3, GRB-5, JBCL-10-12, JBCL-16-12, JBCL-17-01 and Swarna Mani Black SB) were intermated in full diallel fashion to obtain 42 hybrids (including reciprocals), and evaluated in three environments viz., normal fertilizer (E₁, 100:50:50 NPK, kg ha⁻¹), at Vegetable research station, organic condition (E₂, well rotten FYM+Vermicompost) and 25% high fertilizer dose (E₃, 125: 62.5: 62.5 NPK, kg ha⁻¹) at Instruction farm of Agronomy, JAU, Junagadh, Gujarat, India in Randomized Block Design (RBD) with three replications. The mean sum of squares due to genotype (G), environment (E), G×E interaction and E+(G×E) obtained significant for all the traits indicating that characters significantly interacted in different environments and environment created by different dose of fertilizer was justified. The environment index indicated that normal fertilizer environment was best suited for most of traits and organic environment suited for TSS content. Phenotypic stability analysis revealed that stable genotypes GRB-5 and GJB-2×GRB-5 and GRB-5×SB for days to first flowering, GJBH-4, GJB-2×SB, GJB-3×GJB-2 and SB×GJB-2 for days to first picking, SB×JBCL-16-12 for fruit girth, JBCL-17-01× GJB-2 for number of fruits plant⁻¹ and GJB-3, GRB-5 and GJB-3×SB for TSS content over environments. GRB-5×JBCL-16-12 suitable for better environment for fruit yield plant⁻¹. None of the parent and cross found stable for fruit yield plant⁻¹ over environments suggested that environment difference was wider and genotypes stable for other traits can be used in future breeding programme for developing stable genotypes.