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Simultaneous changes in seed size, oil content and protein content driven by selection of SWEET homologues during soybean domestication

文献类型： 外文期刊

作者： Wang, Shoudong 1 ; Liu, Shulin 2 ; Wang, Jie 4 ; Yokosho, Kengo 5 ; Zhou, Bin 6 ; Yu, Ya-Chi 7 ; Liu, Zhi 2 ; Frommer, Wo 1 ;

作者机构： 1.Zhejiang Univ, Coll Life Sci, State Key Lab Plant Physiol & Biochem, Hangzhou 310058, Peoples R China

2.Chinese Acad Sci, Innovat Acad Seed Design, Inst Genet & Dev Biol, State Key Lab Plant Cell & Chromosome Engn, Beijing 100101, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.Fujian Agr & Forestry Univ, Coll Resources & Environm, Fujian Prov Key Lab Haixia Appl Plant Syst Biol, Fuzhou 350002, Peoples R China

5.Okayama Univ, Inst Plant Sci & Resources, Kurashiki, Okayama 7100046, Japan

6.Anhui Acad Agr Sci, Inst Crop Sci, Hefei 230031, Peoples R China

7.Univ Illinois, Sch Integrat Biol, Dept Plant Biol, Urbana, IL 61801 USA

8.Heinrich Heine Univ Dusseldorf, Inst Mol Physiol, Dusseldorf, Germany

9.Heinrich Heine Univ Dusseldorf, Cluster Excellence Plant Sci CEPLAS, Dusseldorf, Germany

10.Fujian Agr & Forestry Univ, FAFU UCR Joint Ctr Hort Plant Biol & Metabol, Haixia Inst Sci & Technol, Fuzhou 350002, Peoples R China

关键词： soybean; domestication; yield; seed quality; SWEET

期刊名称：NATIONAL SCIENCE REVIEW （ 影响因子：17.275； 五年影响因子：17.584 ）

ISSN： 2095-5138

年卷期： 2020 年 7 卷 11 期

页码：

收录情况： SCI

摘要： Soybean accounts for more than half of the global production of oilseed and more than a quarter of the protein used globally for human food and animal feed. Soybean domestication involved parallel increases in seed size and oil content, and a concomitant decrease in protein content. However, science has not yet discovered whether these effects were due to selective pressure on a single gene or multiple genes. Here, re-sequencing data from >800 genotypes revealed a strong selection during soybean domestication on GmSWEET10a. The selection of GmSWEET10a conferred simultaneous increases in soybean-seed size and oil content as well as a reduction in the protein content. The result was validated using both near-isogenic lines carrying substitution of haplotype chromosomal segments and transgenic soybeans. Moreover, GmSWEET10b was found to be functionally redundant with its homologue GmSWEET10a and to be undergoing selection in current breeding, leading the the elite allele GmSWEET10b, a potential target for present-day soybean breeding. Both GmSWEET10a and GmSWEET10b were shown to transport sucrose and hexose, contributing to sugar allocation from seed coat to embryo, which consequently determines oil and protein contents and seed size in soybean. We conclude that past selection of optimal GmSWEET10a alleles drove the initial domestication of multiple soybean-seed traits and that targeted selection of the elite allele GmSWEET10b may further improve the yield and seed quality of modem soybean cultivars.

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