Genome-Wide Association Studies of Soybean Seed Hardness in the Chinese Mini Core Collection |
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| Authors: | Xing Zhang Jinming Zhao Yuanpeng Bu Dong Xue Zhangxiong Liu Xiangnan Li Jing Huang Na Guo Haitang Wang Han Xing Lijuan Qiu |
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| Institution: | 1.National Center for Soybean Improvement/National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetics and Breeding for Soybean, Ministry of Agriculture,Nanjing Agricultural University,Nanjing,People’s Republic of China;2.The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI)/Key Lab of Germplasm Utilization (MOA),Institute of Crop Science, Chinese Academy of Agricultural Sciences,Beijing,People’s Republic of China |
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| Abstract: | Soybean seed hardness is an important quality character in soybean food processing. Both vegetable soybean and natto require soft seeds to achieve a desirable sensory experience and for effective processing. In this study, we used a texture analyzer to measure the seed hardness of Chinese mini core collection via two indexes over 4 years and found significant correlations among the seed hardness, seed oil content, and germplasm eco-region. Based on 1514 SNPs, genome-wide association studies (GWAS) were conducted using a mixed linear model (MLM). Seventeen SNPs were identified to be associated with seed hardness in at least two environments. Among them, one locus, designated Q-15-0087770, was associated with two indexes, and 13 putative genes were confirmed based on their annotations in SoyBase. This research provides new insights into advanced marker-assisted selections for breeding soybeans for seed hardness and oil content. |
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