Abstract

A field experiment was conducted with 21 F, hybrids to examine the association of yield associated physiological and yield characters with grain yield in rice. Grain yield had significant correlation with productive tillers/plant, 100-grain weight, panicle length, post flowering CGR, LAI at heading and harvest index. Within the yield components, productive tillers exhibited high correlation with CGR and LAI at heading. Path analysis revealed that, in addition to CGR, days to 50% flowering had high direct positive effects on yield. Therefore, it was concluded that high yielding nature of hybrids was mainly due to high tillering habit coupled with high test weight of grains and these two attributes inturn were highly related to CGR and LAL.

Keywords: Correlations, Physiological parameters, Rice.