Natural variation of Dt2 determines branching in soybean

Qianjin Liang, Liyu Chen, Xia Yang, Hui Yang, Shulin Liu, Kun Kou, Lei Fan, Zhifang Zhang, Zongbiao Duan, Yaqin Yuan, Shan Liang, Yucheng Liu, Xingtong Lu, Guoan Zhou, Min Zhang, Fanjiang Kong () and Zhixi Tian ()
Additional contact information
Qianjin Liang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Liyu Chen: Guangzhou University
Xia Yang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Hui Yang: Guangzhou University
Shulin Liu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Kun Kou: Guangzhou University
Lei Fan: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Zhifang Zhang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Zongbiao Duan: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yaqin Yuan: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Shan Liang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yucheng Liu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Xingtong Lu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Guoan Zhou: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Min Zhang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Fanjiang Kong: Guangzhou University
Zhixi Tian: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Shoot branching is fundamentally important in determining soybean yield. Here, through genome-wide association study, we identify one predominant association locus on chromosome 18 that confers soybean branch number in the natural population. Further analyses determine that Dt2 is the corresponding gene and the natural variations in Dt2 result in significant differential transcriptional levels between the two major haplotypes. Functional characterization reveals that Dt2 interacts with GmAgl22 and GmSoc1a to physically bind to the promoters of GmAp1a and GmAp1d and to activate their transcription. Population genetic investigation show that the genetic differentiation of Dt2 display significant geographic structure. Our study provides a predominant gene for soybean branch number and may facilitate the breeding of high-yield soybean varieties.

Date: 2022
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DOI: 10.1038/s41467-022-34153-4

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