ANALYSIS OF YIELD COMPONENTS ON SEED YIELD IN F4 FAMILIES OF RICE (ORYZA SATIVA L.)Khonang Longkho and P.C. Kole
The experiment was conducted in a population comprising 30 F4 families of rice (Oryza sativa L.) derived from 15 different crosses. The effects of 10 yield components viz., plant height, panicle length, flag leaf area, panicle number, number of primary and secondary branches panicle-1, spikelet number panicle-1, spikelet ferilty per cent, 100-grain weight, grain yield panicle-1 on grain yield plant-1 were studied. Association studies indicated that correlations of grain yield with primary branches panicle-1, secondary branches panicle-1, number of spikelet and grain yield panicle-1 were positive and significant at both genotypic and phenotypic levels. Path analyses at both genotypic and phenotypic revealed that the direct selection for primary branches panicle-1 and secondary branches panicle-1 with restricted selection for number of panicles, length for panicle and 100-grain weight will increase the yield of rice in the population under study comprising F4 families of rice.