CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2022, Vol. 44 ›› Issue (3): 548-554.doi: 10.19802/j.issn.1007-9084.2021101

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QTL mapping and candidate genes identification for flowering time of soybean

Wei LIU(), Yu-bin WANG, Wei LI, Li-feng ZHANG, Cai-jie WANG, Ran XU, Hai-ying DAI, Yan-wei ZHANG()   

  1. Crop Research Institute, Shandong Academy of Agricultural Sciences / Shandong Engineering Laboratory of Featured Crops, Jinan 250100, China
  • Received:2021-03-20 Online:2022-06-25 Published:2022-07-04
  • Contact: Yan-wei ZHANG E-mail:hnaulw@126.com;zywei-1987@163.com


Soybean is sensitive to photoperiod, and the cultivation area of each soybean variety is restricted to a very narrow latitudinal range. The adaptability of soybean between different latitudes is closely related to flowering time. In order to excavate the genes controlling flowering time of soybean, we performed QTL mapping for flowering time by using recombinant inbred line (RIL) population derived from Huapidou × Qihuang 26 cross and high-density linkage map constructed based on specific length amplified fragment sequencing (SLAF-seq). In total, 11 QTLs were identified on 7 chromosomes. Of them, 4 QTLs (qFT8, qFT20-2, qFT14 and qFT16) were newly identified in this study. Furthermore, 6 QTLs (qFT6-1, qFT8, qFT11-1, qFT19, qFT20-1 and qFT20-2) exist stably in 2 environments. By performing the sequences and bioinformatics analysis of genes between 6 stable QTL intervals, 4 candidate genes related to flowering time regulation had been identified. The results of this research were expected to provide a foundation for understanding the molecular mechanism of soybean adaptability and cultivating the varieties with wide adaptability.

Key words: soybean, flowering time, QTL, candidate genes identification

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