Stability analysis for physiological traits, grain yield and its attributing parameters in oats (Avena sativa L.) in the Kashmir valley

Abstract

Eleven genotypes of oats were planted at six diverse environments to assess genotype environment interaction and determine stable oat (Avena sativa L.) cultivar in Kashmir division for grain yield using randomized block design during 2014 to 2015. There was considerable variation in grain yield and physiological traits within and across environments. Stability analysis for grain yield was conducted to check the response to Genotype x Environment interactions. The mean squares due to G x E (linear) were significant depicting genetic differences among genotypes for linear response to varying environments. Mean squares due to pooled deviations were highly significant, reflecting considerable differences among genotypes for non-linear response. Out of eleven genotypes, only three oats lines i.e., SKO-98, SKO-166 and Sabzaar, showed non-significant deviation from regression and their regression coefficient values were close to unity and desirable for grain yield across the environments. The cultivar, “SKO-98” with respective regression coefficient value of 1.018, the smallest deviations from regressions (S2di) value (0.025) and the above average grain yield could be considered the most widely adapted cultivar.

Keywords

• g x e interaction
• stability analysis
• grain yield
• oats