香型杂交水稻产量构成要素杂种优势表现及通径分析

Heterosis and Path Analysis for Yield Component Factor of Aromatic Hybrid Rice

此文使用的4个香型不育系与9个恢复系不完全配组,共21个组合,对产量构成要素的杂种优势分析表明:每穗粒数有较强的正优势,结实率表现为较强的负优势;通径分析的结果是:对单株产量直接贡献最大的是有效穗(1.0193)>每穗粒数(0.9260)>结实率(0.7860)>千粒重(0.5450)。此文研究表明,香型杂交稻组合的选育应保证有效穗的前提下,着重提高结实率。

This study used 4 aromatic CMS line and 9 restoring line uncompleted hybrid for 21 varieties.The results showed that analysis of yield component heterosis： number of grains per panicle have stronger positive heterosis,seed setting percentage have negative heterosis.The results showed that path analysis： the effect between yield and yield component factor,effective panicle （1.0193） number of grains per panicle （0.9260） seed setting percentage （0.7860） 1000 grain weight （0.5450）.So in hybrid aromatic rice breeding,we should improve seed setting percentage on ensuring the base of effective panicle.