论文部分内容阅读
随机选取中豆29×中豆32重组自交系群体中165个家系作为2年田间试验材料,分析大豆单株产量、产量构成因子及倒伏性的相关性和遗传效应,并检测各性状QTL。结果表明,38个与产量、产量构成因子及倒伏性状等有关的QTL主要集中在C2、F和I连锁群。表型相关分析结果与QTL定位结果一致。在F连锁群上,2年均检测到倒伏QTLqLD-15-1,解释的表型变异超过20%,与百粒重和分枝荚数QTL分别位于相同和相邻标记区间,表明产量相关性状与倒伏性存在一定的关联。在I连锁群上,每荚粒数QTL和二、三、四粒荚数QTL不仅于同一位置,解释的表型变异为32%~65%,并且2个年份均重复出现,每荚粒数和四粒荚数QTL与二、三粒荚数QTL的增效基因分别来自不同的亲本。这4个粒荚性状QTL的共位性与表型相关分析结果一致,证实每荚粒数和四粒荚数与二、三粒荚数分别由不同的机制调控。
Two hundred and sixty-five inbred lines of 32 × 29 × Zhongdou inbred lines were randomly selected as the two-year field experiment materials to analyze the correlation and genetic effects of single plant yield, yield components and lodging and to test the QTLs of each trait. The results showed that 38 QTLs related to yield, yield components and lodging traits were mainly concentrated in the C2, F and I linkage groups. Phenotypic correlation analysis was consistent with QTL mapping. In the F linkage group, QTLqLD-15-1 was detected for 2 years of lodging, explaining a phenotypic variation of more than 20%, which was located in the same and adjacent marker intervals with 100-kernel weight and pod number respectively, indicating that yield-related traits There is a certain relationship with lodging. In the I linkage group, the QTL per pod grain number and the QTLs of two, three and four pods were not only in the same position, but the explained phenotypic variation was 32% -65%, and the two years were repeated. And four pods QTL and two or three pods QTL synergistic genes were from different parents. The co-locus and phenotypic correlation analysis of the four QTLs for pod characteristics confirmed that each pod number and four pods and two and three pods were regulated by different mechanisms.