A Study on Yield Components of Hybrid Rice with Big Panicle

With two high-yielding hybrid rice combinations Shanyou 63 and Liangyoupeijiu as check,18 combinations with big panicle are chosen to study the relationships between yield components and yield.The results showed that:(1) A very significant increase in grain weight per plant(GWPP) of Super high-yielding combinations mainly results from more panicles per plant(PPP).(2) The order of contribution to GWPP was panicles per plant,filled grains per panicle(FGPP),1000-grain weight(KGW),spikelets per panicle(SPP),plumping degree(PD) filled grain rate(FGR).(3) GWPP has positive correlation with PPP and FGPP at 0.01significant level,with FGR at 0.05 significant level.(4)On the background of big panicle hybrid rice GWPP has positive partial correlation with PPP,KGW and PD at 0.01 significant level,which means any increase in these yield components can increase yield.