Stability analysis of upland rice under different agro-climatic conditions

The genotype x environment(GxE) interaction for grain yield and some associated traits was studied in forty five rainfed upland rice genotypes under eight different environments in Allahabad (U.P.) and Ranchi (Jharkhand) during wet season 2009-10 and 2010-11. The pooled analysis of variance indicated that the mean sum of square due to genotypes for all the traits and G E interaction for many traits were significant which clearly indicated that the genotypes differ in their adaptability and stability. The significant G x E interaction (linear) of many traits indicated differential response of the genotype to environmental changes. The pooled deviations were also significant for all the traits studied which suggested that these genotypes differed in their deviation from linearity. Stability parameters (mean, bi and s 2di) of the genotypes estimated separately over eight environments. Considering all the stability parameters, seven genotypes namely BAU 438-6-2, OR 2084-2, BAU 363-96 , RR-410-79-1-B-D2-B , NDR-1054-4-1 , BAU/GVT 435-06 and UPRI-2004-6 were selected as stable and desirable for rainfed upland condition.