期刊
PLANT JOURNAL
卷 107, 期 6, 页码 1739-1755出版社
WILEY
DOI: 10.1111/tpj.15414
关键词
domestication; gene copy number; shoot length; growth habit; gibberellin 2-oxdase; soybean
资金
- Hong Kong Research Grants Council Area of Excellence Scheme [AoE/M-403/16]
- Guangdong Provincial Department of Science and Technology 2020 Key Areas Research and Development Programs: Breeding for High Yield and High Quality New Soybean Cultivars for Tropics and Subtropics [2020B020220008]
- Lo Kwee-Seong Biomedical Research Fund
- Collaborative Research Fund [C4057-18EF]
- CUHK Group Research Scheme [3110135]
Copy number variations (CNVs) play an important role in crop domestication, particularly in soybeans where a specific CNV region affecting trailing growth and shoot length was identified. This CNV region underwent intense selection during the initial domestication process, demonstrating its significance in soybean adaptation.
Copy number variations (CNVs) play important roles in crop domestication. However, there is only very limited information on the involvement of CNVs in soybean domestication. Trailing growth and long shoots are soybean adaptations for natural habitats but cause lodging that hampers yield in cultivation. Previous studies have focused on Dt1/2 affecting the indeterminate/determinate growth habit, whereas the possible role of the gibberellin pathway remained unclear. In the present study, quantitative trait locus (QTL) mapping of a recombinant inbred population of 460 lines revealed a trailing-growth-and-shoot-length QTL. A CNV region within this QTL was identified, featuring the apical bud-expressed gibberellin 2-oxidase 8A/B, the copy numbers of which were positively correlated with expression levels and negatively with trailing growth and shoot length, and their effects were demonstrated by transgenic soybean and Arabidopsis thaliana. Based on the fixation index, this CNV region underwent intense selection during the initial domestication process.
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