摘要
通过对四川5个具有代表性恢复系所配组合即MH63系列、CDR22系列、FH838系列、MH725系列和SH527系列的分析得出,除了SH527系列品种的平均产量为8.25 t/hm2外,其余几个系列产量水平相当;在主成分分析中SH527系列品种的第一主成分因子是有效穗粒数因子,而产量构成因素三者与产量之间的直接通径系数相近,说明三者对产量的作用都相当,这说明当其穗粒数达到一定高度时,穗数因子又成为新一轮产量增长的限制因素。
Through analysis of the varieties combined by major restorer lines MH63, CDR22, FH838, MH725 and SH527 of Sichuan in hybrid rice, the resuhs indicated that the mean grain yield of 4 lines varieties are similar, except 8.25 t/hm^2 of variety restorered by SH527; in principal component analysis, the first principal component of variety restorered by SH527 is effective panicle and number of filled grain per panicle and the 3 factors of yield play important role together in yield. It shows that number of panicle becomes new restrictive factor to increasing grain yield when number of filled grain per panicle reaches certain extent.
出处
《四川农业大学学报》
CSCD
北大核心
2009年第1期38-41,共4页
Journal of Sichuan Agricultural University
关键词
杂交水稻
农艺性状
穗实粒数
有效穗
hybrid rice
agronomic characteristics
number of filled grain per panicle
effective panicle
