Draft genome of the peanut A-genome progenitor (Arachis duranensis) provides insights into geocarpy, oil biosynthesis, and allergens

Chen, X and Li, H and Pandey, M K and Yang, Q and Wang, X and Garg, V and Li, H and Chi, X and Doddamani, D and Hong, Y and Upadhyaya, H D and Guo, H and Khan, A W and Zhu, F and Zhang, X and Pan, L and Pierce, G J and Zhou, G and Krishnamohan, K A V S and Chen, M and Zhong, N and Agarwal, G and Li, S and Chitikineni, A and Zhang, G Q and Sharma, S and Chen, N and Liu, H and Janila, P and Li, S and Wang, M and Wang, T and Sun, J and Li, X and Li, C and Wang, M and Yu, L and Wen, S and Singh, S and Yang, Z and Zhao, J and Zhang, C and Yu, Y and Bi, J and Zhang, X and Liu, Z J and Paterson, A H and Wang, S and Liang, X and Varshney, R K and Yu, S (2016) Draft genome of the peanut A-genome progenitor (Arachis duranensis) provides insights into geocarpy, oil biosynthesis, and allergens. Proceedings of the National Academy of Sciences, 113 (24). pp. 6785-6790. ISSN 0027-8424

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Abstract

Peanut or groundnut (Arachis hypogaea L.), a legume of South American origin, has high seed oil content (45–56%) and is a staple crop in semiarid tropical and subtropical regions, partially because of drought tolerance conferred by its geocarpic reproductive strategy. We present a draft genome of the peanut A-genome progenitor, Arachis duranensis, and 50,324 protein-coding gene models. Patterns of gene duplication suggest the peanut lineage has been affected by at least three polyploidizations since the origin of eudicots. Resequencing of synthetic Arachis tetraploids reveals extensive gene conversion in only three seed-to-seed generations since their formation by human hands, indicating that this process begins virtually immediately following polyploid formation. Expansion of some specific gene families suggests roles in the unusual subterranean fructification of Arachis. For example, the S1Fa-like transcription factor family has 126 Arachis members, in contrast to no more than five members in other examined plant species, and is more highly expressed in roots and etiolated seedlings than green leaves. The A. duranensis genome provides a major source of candidate genes for fructification, oil biosynthesis, and allergens, expanding knowledge of understudied areas of plant biology and human health impacts of plants, informing peanut genetic improvement and aiding deeper sequencing of Arachis diversity.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Arachis duranensis, Genome sequence, Gene models, Polyploidizations, Gene duplication, Peanut, Groundnut, Oil Biosynthesis, Genomics
Subjects: Mandate crops > Groundnut
Others > Oil seeds
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 26 Sep 2016 04:49
Last Modified: 26 Sep 2016 04:49
URI: http://oar.icrisat.org/id/eprint/9693
Official URL: http://dx.doi.org/10.1073/pnas.1600899113
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: This project was supported by the National Natural Science Foundation of China (31501246 and 31271767); the Modern Agro-industry Technology Research System (CARS-14); the Science and Technology Planning Project of Guangdong Province (2015B020231006, 2016B020201003, 2012B050700007, and S2013020012647); Pearl River Science and Technology Nova of Guangzhou (2013J2200088), the Southeastern US Region Peanut Research Initiative; the Georgia Peanut Commission; the University System of Georgia Regent’s Professorship funds; and USAID–ICRISAT (International Crops Research Institute for the Semi-Arid Tropics) Linkage Grants. This work has also been undertaken as part of the CGIAR (Consultive Group for International Agricultural Research) Research Program on Grain Legumes. ICRISAT is a member of the CGIAR Consortium. This article is a PNAS Direct Submission. This article is Freely available online through the PNAS open access option.
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