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Comparison of Arachis monticola with Diploid and Cultivated Tetraploid Genomes Reveals Asymmetric Subgenome Evolution and Improvement of Peanut

文献类型： 外文期刊

作者： Yin, Dongmei 1 ; Ji, Changmian 2 ; Song, Qingxin 4 ; Zhang, Wanke 7 ; Zhang, Xingguo 1 ; Zhao, Kunkun 1 ; Chen, Charle 1 ;

作者机构： 1.Henan Agr Univ, Coll Agron, Zhengzhou 450002, Henan, Peoples R China

2.Biomarker Technol Corp, Beijing 101300, Peoples R China

3.Chinese Acad Trop Agr Sci, Hainan Key Lab Biosafety Monitoring & Mol Breedin, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China

4.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China

5.Univ Texas Austin, Dept Mol Biosci, Austin, TX 78705 USA

6.Univ Texas Austin, Ctr Computat Biol & Bioinformat, Austin, TX 78705 USA

7.Chinese Acad Sci, INASEED, Inst Genet & Dev Biol, State Key Lab Plant Genom, Beijing 100101, Peoples R China

8.Auburn Univ, Coll Agr, Auburn, AL 36849 USA

9.Shandong Peanut Res Inst, Qingdao 266000, Shandong, Peoples R China

10.Tuskegee Univ, Dept Agr & Environm Sci, Tuskegee, AL 36088 USA

11.Heidelberg Univ, Ctr Organismal Studies, D-69120 Heidelberg, Germany

12.Chinese Acad Sci, Natl Key Lab Plant Mol Genet, Ctr Excellence Mol Plant Sci, Inst Plant Physiol & Ecol,Shanghai Inst Biol Sci, Shanghai 200032, Peoples R China

关键词： domestication; evolution; peanut; polyploidy; sequence

期刊名称：ADVANCED SCIENCE （ 影响因子：16.806； 五年影响因子：17.835 ）

ISSN：

年卷期： 2020 年 7 卷 4 期

页码：

收录情况： SCI

摘要： Like many important crops, peanut is a polyploid that underwent polyploidization, evolution, and domestication. The wild allotetraploid peanut species Arachis monticola (A. monticola) is an important and unique link from the wild diploid species to cultivated tetraploid species in the Arachis lineage. However, little is known about A. monticola and its role in the evolution and domestication of this important crop. A fully annotated sequence of approximate to 2.6 Gb A. monticola genome and comparative genomics of the Arachis species is reported. Genomic reconstruction of 17 wild diploids from AA, BB, EE, KK, and CC groups and 30 tetraploids demonstrates a monophyletic origin of A and B subgenomes in allotetraploid peanuts. The wild and cultivated tetraploids undergo asymmetric subgenome evolution, including homoeologous exchanges, homoeolog expression bias, and structural variation (SV), leading to subgenome functional divergence during peanut domestication. Significantly, SV-associated homoeologs tend to show expression bias and correlation with pod size increase from diploids to wild and cultivated tetraploids. Moreover, genomic analysis of disease resistance genes shows the unique alleles present in the wild peanut can be introduced into breeding programs to improve some resistance traits in the cultivated peanuts. These genomic resources are valuable for studying polyploid genome evolution, domestication, and improvement of peanut production and resistance.

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