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The genome of cultivated peanut provides insight into legume karyotypes, polyploid evolution and crop domestication
Journal article   Open access   Peer reviewed

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

W. Zhuang, H. Chen, M. Yang, J. Wang, M.K. Pandey, C. Zhang, W-C Chang, L. Zhang, X. Zhang, R. Tang, …
Nature Genetics, Vol.51(5), pp.865-876
2019
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Published5.10 MBDownloadView
CC BY V4.0 Open Access

Abstract

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.

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Collaboration types
Domestic collaboration
International collaboration
Citation topics
3 Agriculture, Environment & Ecology
3.4 Crop Science
3.4.96 QTL
Web Of Science research areas
Genetics & Heredity
ESI research areas
Molecular Biology & Genetics
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