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A flowering time locus dependent on E2 in soybean

文献类型： 外文期刊

作者： Su, Tong 1 ; Wang, Yanping 3 ; Li, Shichen 1 ; Wang, Lingshuang 1 ; Kou, Kun 1 ; Kong, Lingping 4 ; Cheng, Qun 4 ; Dong, 1 ;

作者机构： 1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Soybean Mol Design Breeding, Innovat Acad Seed Design, Harbin, Peoples R China

2.Univ Chinese Acad Sci, Beijing, Peoples R China

3.Heilongjiang Acad Agr Sci, Mudanjiang Branch, Mudanjiang, Peoples R China

4.Guangzhou Univ, Sch Life Sci, Innovat Ctr Mol Genet & Evolut, Guangzhou, Peoples R China

关键词： Soybean; Flowering time; Quantitative trait loci; Genotyping-by-sequencing; E2

期刊名称：MOLECULAR BREEDING （ 影响因子：2.149； 五年影响因子：2.574 ）

ISSN： 1380-3743

年卷期： 2021 年 41 卷 6 期

页码：

收录情况： SCI

摘要： Soybean [Glycine max (L.) Merrill] is very sensitive to changes in photoperiod as a typical short-day plant. Photoperiodic flowering influences soybean latitudinal adaptability and yield to a considerable degree. Identifying new quantitative trait loci (QTLs) controlling flowering time is a powerful initial approach for elucidating the mechanisms underlying flowering time and adaptation to different latitudes in soybean. In this study, we developed a Recombinant Inbred Lines (RILs) population and recorded flowering time under natural long-day conditions. We also constructed a high-density genetic map by genotyping-by-sequencing and used it for QTL mapping. In total, we detected twelve QTLs, four of which are stable and named by qR1-2, qR1-4, qR1-6.1, and qR1-10, respectively. Among these four QTLs, qR1-4 and qR1-6.1 are novel. QTL mapping in two sub-populations classified by the genotype of the maturity locus E2, genetic interaction evaluation between E2 and qR1-2, and qRT-PCR indicated that E2 has an epistatic effect on qR1-2, and that causal gene of qR1-2 acts upstream of E2. We presumed the most likely candidate genes according to the resequencing data and briefly analyzed the geographic distributions of these genes. These findings will be beneficial for our understanding of the mechanisms underlying photoperiodic flowering in soybean, contribute to further investigate of E2, and provide genetic resources for molecular breeding of soybean.

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