Formulation of suitable selection index by assigning equal economic weights in rice (Oryza sativa L.)

Abstract

The present study was carried out for formulating suitable selection index using forty rice genotypes. In the process of attaining at suitable index, equal economic weights were assigned to all the eleven traits viz., days to 50% flowering, days to maturity, productive tillers per plant, plant height, panicle length, grains per panicle, 1000-seed weight, kernel length, kernel breadth, L/B ratio and grain yield per plant. It was observed that increased estimates of genetic advance were resulted with addition of traits one after another while constructing the selection index. Finally the index formulated using all the eleven characters, recorded maximum expected genetic advance and percent gain over grain yield per plant compared to all 2047 possible combinations.