Genotype x environmental interaction and stability analysis for grain quality and yield in oats (Avena sativa L.)

Abstract

Ten genotypes of oats were planted at three diverse environments to assess genotype environment interaction and determine stable oat (Avena sativa L.) cultivar in Kashmir division for grain quality and grain yield using randomized block design during 2011 to 2012. Stability analysis for grain quality and yield was carried out to check the response to Genotype x Environment interactions. The mean squares due to G x E (linear) were significant reveals genetic differences among genotypes for linear response to varying environments, while mean squares due to pooled deviations were highly significant, reflecting considerable differences among the genotypes for non-linear response. Out of ten genotypes, only three oats lines i.e., SABZAAR, SKO-208 and SKO-209 had non-significant deviation from regression and their regression coefficient values were close to unity classified as stable varieties for grain quality and grain yield.. The cultivar, “SKO-208” with regression coefficient value of 1.009, the smallest deviations from regressions (S2di) value and the highest grain yield could be considered the most widely adapted cultivar. The other test cultivars were sensitive to production-limiting factors, their wider adaptability, stability and general performance to the fluctuating growing conditions within and across environments.

Keywords

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