不同遗传背景和环境条件下大豆油分含量与产量性状的相关性和通径分析

Path and Correlation Analysis between Oil Content and Yield Related Traits of Soybean in Multi-Genetic Backgrounds and Multi-Environments

以高油品种合丰47分别与高产品种黑农37和高油品种黑农44杂交所得的2个重组自交系群体(AB,AC)以及高油品种东农46与高产品种垦鉴23杂交获得的1个重组自交系群体(DE)为材料,比较分析了3个重组自交系群体在7个不同环境下油分含量的遗传变异和主要农艺性状的相关性。结果表明,3个群体的油分含量呈正态分布,双亲油分含量高有利于提高杂交后代的油分含量。在不同环境下3个群体油分含量与单株粒数、单株荚数呈正相关,与株高呈负相关。油分含量与单株粒重在AB和AC 2个群体中呈正相关。大豆油分与其它农艺性状相关性在不同群体和不同环境下存在差异。通径分析结果表明,单株粒数与单株粒重对油分含量的直接和间接效应最大。

Oil content is an important trait in soybean and many efforts have been conducted to increase it.The genetic variation of oil content and the correlations between oil content and yield together with yield related traits in seven different environments were analyzed among three RIL populations in present study.These three inbred lines（RILs）were crossed by Hefeng 47/Heinong 37,Hefeng 47/Heinong 37 and Dongnong 46/Kenjian 23 and consisted of 148,109 and 153 lines,respectively.The average oil content in three populations showed a normal distribution,and the mean oil content of the cross with parents both rich in oil was higher than other crosses.The correlation between oil and yield and yield related traits indicated that oil content was positively correlated with pod number per plant and seed number per plant in all three populations in seven different environments.Seed weight per plant also showed positive cor with oil content in two populations（AB,AC）.However,the negative correlation was observed between oil content and plant height.For other agronomic traits,they showed different correlation with oil content in different crosses and various environments.In addition,path coefficients between oil content and the yield together with yield related traits showed that seed number per plant and seed weight per plant had the highest direct and indirect effects on oil content.