Stability analysis for grain yield and yield components of rice (Oryza sativa L.) in low lands of hill zone of Karnataka

Abstract

In Karnataka rice (Oryza sativa L.) is predominantly grown over an area of nearly 2.85 lakh hectares in eight districts of the hill region with a average productivity of 2.5 Vha. Hill zone of Karnataka is a peculiar paddy growing belt and crop is cultivated as a mono crop during kharif under rain-fed situation in three different topographical situations viz., uplands, mid lands and low lands. The farmers in these areas usually grow, high yielding long duration local varieties which are poor yieldets and lodging types. In order to evolve a suitable and stable rice variety, it is necessary to test different genotypes in the target environment. Information on the G x E interaction and stability parameters provides a better measure of stable variety and the varietal adaptability. The present study was conducted to assess the elite rice genotypes for their yield stability at three different locations during kharif season.