Validation of the quantitative trait locus underlying soybean plant height using residual heterozygous lines and near-isogenic lines across multi-environments

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• 作者：Long Yan ; Yuanyuan Zhang ; Qijian Song ; Perry B. Cregan ; Chunyan Yang…
• 关键词：Soybean ; Plant height ; QTL ; Multi ; environments ; RHLs ; NILs
• 刊名：Euphytica
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：213
• 期：2
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Plant Sciences; Plant Genetics & Genomics; Plant Pathology; Plant Physiology; Biotechnology;
• 出版者：Springer Netherlands
• ISSN：1573-5060
• 卷排序：213

文摘

Illustrating the consistency and pleiotropic effects of a quantitative trait locus (QTL) across multi-locations is important for breeding. In this study, a QTL qPH_6_1, underlying soybean plant height, was positioned on chromosome 6 using a BC₂F₅ family, which was developed using ‘Jidou 12’ as recurrent parent, and ‘Xinbada 2’ as donor parent. The residual heterozygous lines (RHLs) derived from BC₂F₅ plants that segregated at qPH_6_1 were used to validate and pinpoint the QTL at both locations. For RHLs, qPH_6_1 explained approximately 80% of the variance for plant height and number of nodes, and was positioned in a 3.5 cM interval co-segregated with Satt557, Satt489, Satt134 and Satt289. The analysis of near-isogenic lines, developed from RHLs, also showed that qPH_6_1 had a significant impact on plant height and number of nodes across the other ten locations in 2 years. A larger genetic effect was observed at locations in north China than in south. While, qPH_6_1 could only explain 1.6–30.4% of the phenotypic variation for 100-seed weight, protein content, oil content, and grain yield, and their effects varied with locations. The results provide information for breeding widely adapted soybean cultivars.