Genotypic × Environment Interaction and Stability Analysis for Bulb Yield and Yield Attributes in Onion (Allium cepa L.)

Abstract

An experiment was conducted for estimating the Genotypic × Environment interaction and stability for bulb yield and yield attributes in onion. 36 elite genotypes were evaluated during winter season (rabi) 2022-23 at three different environments in 3 replications. Estimate of environment wise analysis of variance suggested the significant differences for all the characters in all environments. Significant mean squares due to environments were also observed for all the traits under study showed that environments selected for study were random and different in agro-climatic conditions. Genotypes x interactions were significant for all the characters. Joint consideration of mean performance and stability parameters revealed that parents RO-1 and RO-59 were above average stable for bulb yield and were considered suitable for general adaptation. The crosses RO-1 × RO-59, RO-1 × Pusa Shobha, RO-1 × Pusa Madhavi, Pusa Shobha × Pusa Madhavi and Pusa Madhavi × Pusa Red were considered suitable for better environmental condition for bulb yield, while, the crosses RO-1 × Bhima Kiran, RO-59 × Pusa Madhavi, RO-59 × Pusa Red, Bhima Kiran × Bhima Shakti, Bhima Kiran × Pusa Shobha, Bhima Kiran × Pusa Madhavi and Bhima Kiran × Kashi No. 1 were considered suitable for general adaptation.