Mapping QTL underlying plant height at three development stages and its response to density in soybean [Glycine max(L.) Merri.]

Autor: Dong, Quanzhong, Zhang, Kaixin, Sun, Xu, Tian, Xiaocui, Qi, Zhongying, Fang, Yanlong, Li, Xiyu, Wang, Yue, Song, Jie, Wang, Jiajing, Yang, Chang, Jiang, Sitong, Li, Wen-Xia, Ning, Hailong
Zdroj: Biotechnology & Biotechnological Equipment; January 2020, Vol. 34 Issue: 1 p395-404, 10p
Abstrakt: AbstractTo keep plant height (PH) stable in various densities, mapping QTL underlying te response of PH to density is of importance for soybean breeding. In this study, two soybean RIL populations were planted under two densities in two environments and PH at the pod-bearing stage (PBS), seed-filling stage (SFS) and maturity stage (MS) were measured to identify QTL controlling PH and its response to density increment. Expression of QTL controlling PH varied due to the change of seeding density, and the response to density (RD) of PH at SFS and MS surpassed that at PBS in both populations. Total 25 PH QTL and 8 RD QTL were identified which functioned on PH at three developmental stages. Of 25 PH QTL, 14, 8 and 8 were detected at PBS, SFS and MS, respectively. Three QTL could be expressed at two stages, and thirteen, seven and six QTL played roles separately at PDS, SFS and MS, respectively. Four QTL were expressed in the two seeding densities, and twelve and ten QTL showed effects specifically at low and high seeding density, respectively. Among eight RD QTL, five, two and one acted on PH at PBS, SFS and MS, and five and three QTL functioned in two environments, respectively. The information found in the present research lays the foundation for molecular design breeding on improving PH with stability in multiple densities in soybean.
Databáze: Supplemental Index
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