April 21, 2020  |  

The genome of cultivated peanut provides insight into legume karyotypes, polyploid evolution and crop domestication.

Authors: Zhuang, Weijian and Chen, Hua and Yang, Meng and Wang, Jianping and Pandey, Manish K and Zhang, Chong and Chang, Wen-Chi and Zhang, Liangsheng and Zhang, Xingtan and Tang, Ronghua and Garg, Vanika and Wang, Xingjun and Tang, Haibao and Chow, Chi-Nga and Wang, Jinpeng and Deng, Ye and Wang, Depeng and Khan, Aamir W and Yang, Qiang and Cai, Tiecheng and Bajaj, Prasad and Wu, Kangcheng and Guo, Baozhu and Zhang, Xinyou and Li, Jingjing and Liang, Fan and Hu, Jiang and Liao, Boshou and Liu, Shengyi and Chitikineni, Annapurna and Yan, Hansong and Zheng, Yixiong and Shan, Shihua and Liu, Qinzheng and Xie, Dongyang and Wang, Zhenyi and Khan, Shahid Ali and Ali, Niaz and Zhao, Chuanzhi and Li, Xinguo and Luo, Ziliang and Zhang, Shubiao and Zhuang, Ruirong and Peng, Ze and Wang, Shuaiyin and Mamadou, Gandeka and Zhuang, Yuhui and Zhao, Zifan and Yu, Weichang and Xiong, Faqian and Quan, Weipeng and Yuan, Mei and Li, Yu and Zou, Huasong and Xia, Han and Zha, Li and Fan, Junpeng and Yu, Jigao and Xie, Wenping and Yuan, Jiaqing and Chen, Kun and Zhao, Shanshan and Chu, Wenting and Chen, Yuting and Sun, Pengchuan and Meng, Fanbo and Zhuo, Tao and Zhao, Yuhao and Li, Chunjuan and He, Guohao and Zhao, Yongli and Wang, Congcong and Kavikishor, Polavarapu Bilhan and Pan, Rong-Long and Paterson, Andrew H and Wang, Xiyin and Ming, Ray and Varshney, Rajeev K

High oil and protein content make tetraploid peanut a leading oil and food legume. Here we report a high-quality peanut genome sequence, comprising 2.54?Gb with 20 pseudomolecules and 83,709 protein-coding gene models. We characterize gene functional groups implicated in seed size evolution, seed oil content, disease resistance and symbiotic nitrogen fixation. The peanut B subgenome has more genes and general expression dominance, temporally associated with long-terminal-repeat expansion in the A subgenome that also raises questions about the A-genome progenitor. The polyploid genome provided insights into the evolution of Arachis hypogaea and other legume chromosomes. Resequencing of 52 accessions suggests that independent domestications formed peanut ecotypes. Whereas 0.42-0.47 million years ago (Ma) polyploidy constrained genetic variation, the peanut genome sequence aids mapping and candidate-gene discovery for traits such as seed size and color, foliar disease resistance and others, also providing a cornerstone for functional genomics and peanut improvement.

Journal: Nature genetics
DOI: 10.1038/s41588-019-0402-2
Year: 2019

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