荣丰A所配系列早杂组合产量结构分析

摘要

This study conducted the phenotypic value analysis, correlation analysis and path analysis of 8 main agronomic traits of 12 early rice combinations bred with Rongfeng A, which were tested in the regional trials in Jiangxi from 2006 to 2010. The results showed that the coefficient of variation of 6 traits ( effective panicle number, plant height, total grain number per panicle, filled grain number per panicle, 1000 - grain weight and yield) was relatively large, while that of seed setting rate and ear length was small. The yield was very significantly positively correlated with seed setting rate, and positively correlated with other 6 traits. Yield was positively directly affected by effective panicle number, plant height and filled grain number per panicle, and was negatively directly affected by ear length, total grain number per panicle, seed setting rate and 1000 -grain weight. The effect of the 8 traits on the formation of yield was in the following order: filled grain number per panicle > total grain number per panicle > seed setting rate > plant height > effective panicle number > ear length > 1000 - grain weight.%对2006～ 2010年参加江西省区试的12个荣丰A所配组合的8个主要农艺性状进行表型值分析、相关分析和通径分析,结果表明:有效穗、株高、穗总粒数、穗实粒数、千粒重和产量等6个性状的变异系数相对较大,结实率和穗长的变异系数较小；结实率与产量呈极显著简单正相关,其余6个性状与产量呈简单正相关；有效穗、株高和穗实粒数等性状对产量形成起正向直接作用,穗长、穗总粒数、结实率和千粒重等性状对产量起负向直接作用.对产量形成的作用大小依次为:穗实粒数＞穗总粒数＞结实率＞株高＞有效穗＞穗长＞千粒重.