Genotype X environment interaction and stability of pre-release cultures and varieties of rice

Abstract

Stability analysis conducted using the data collected from nine genotypes of rice evaluated during IS)8."i, 84, 85, «7and 88 kharif seasons at the College of Agriculture, Vellayani revealed that .ill the nine genotypes were stable for height of the plant. With regard to tillers per plant, Cul.126 (Keinya) and I'avi/Jiom were stable. The genotypes Karthika, Asha, Pavizhom, Cul.25331 and Cul.126 (Kemya) were stable for sheath blight disease, while Karlhika, Cul.25331, Cul.l2(i(Remya) and Cul.4(Aaralhy) were stable for sheath rot disease. Regard ing the grain yield, Karlhika and Cul.4 (Aarathy) can be considered as stable genotypes, since they had higher yield than grand mean along with average response and non-significant deviation from regression.