摘要
利用 9个性状差异较大的品种 (品系 ) ,按完全双列杂交 (正交 )组配成 36个杂交组合 ,利用 Nair单性状水平分组法将 36个杂交组合的产量及产量结构优势进行了分组研究。结果表明 ,不同产量水平下各产量构成因素的杂种优势大小不同。在产量优势 >10 %的强优势组合中 ,穗粒重优势对产量优势的贡献最大 ,千粒重优势的贡献最小。产量构成各因素优势与产量优势的关系研究表明 ,产量构成因素的优势是可以协调发展的 ,不应单纯追求某一因素的优势 。
From 1999 to 2001, thirty six hybrids were got from nine diallel crosses. Yield and yield structure heterosis were divided into different groups by single characteristic method of Nair grouping. The results showed that the heterosis of each yield component was different at different yield levels. Among the crosses with strong heterosis at the level of yield heterosis above ten percent, the contribution of the grain weight per head heterosis to yield heterosis was the largest, the 1000 kernel weight heterosis to yield heterosis was the smallest. The study on the relationship of each yield component heterosis and yield heterosis implied that the heterosis of each yield component could appropriately developed, we shouldnt only go after one component heterosis , yet overlooked another heterosis .
出处
《麦类作物学报》
CAS
CSCD
2002年第3期1-6,共6页
Journal of Triticeae Crops
基金
国家小麦育种中心杨凌分中心资助项目 (1999-5 )
