Variation and association among panicle traits in rice

摘要

A study on genetic variation and interrelationship of grain yield panicle~(-1) and associated characters in hill rices was carried out using 60 advanced breeding lines/cultivars. High genotypic coefficient of variation was observed for grain yield panicle~(-1), number of secondary branches panicle~(-1), flag leaf area, high-density grain (%) and number of grains panicle~(-1) . For all the traits, estimates for PCV were higher than that for GCV indicating the influence of environment. Grain yield panicle~(-1) had significant positive association with number of grains panicle~(-1), number of primary and secondary branches panicle~(-1) and panicle length, Path analysis at genotypic level revealed the number of grains panicle~(-1) to be the major contributing character towards the grain yield panicle~(-1) followed by number of primary branches panicle~(-1) and panicle length. In addition, number of secondary branches panicle~(-1) contributed indirectly via number of grains and primary branches panicle~(-1). For improving the grain yield panicle~(-1), emphasis should be given for longer panicles couprled with more number of grains and primary and secondary branches panicle~(-1).