The genome sequences of Arachis duranensis and Arachis ipaensis, the diploid ancestors of cultivated peanut
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David John Bertioli, Steven B Cannon, Lutz Froenicke, Guodong Huang, Andrew Farmer, Ethalinda Cannon, Xin Liu, Dongying Gao, Josh Clevenger, Sudhansu Dash, Longhui Ren, Márcio C Moretzsohn, Kenta Shirasawa, Wei Huang, Bruna vidigal, Brian Abernathy, Ye Chu, Chad Niederhuth, Pooja Umale, Ana Claudia Guerra de Araujo, Alexander Kozik, Kyung Do Kim, Mark D Burow, Rajeev Varshney, Xingjun Wang, Xinyou Zhang, Noelle Barkley, Patrícia M Guimarães, Sachiko Isobe, Baozhu Guo, Boshou Liao, H Thomas Stalker, Robert J Schmitz, Brian Scheffler, Soraya C M Leal-Bertioli, Xun Xu, Scott Jackson, Richard Michelmore, Peggy Ozias-Akins. (30/4/2016). The genome sequences of Arachis duranensis and Arachis ipaensis, the diploid ancestors of cultivated peanut. Nature Genetics, 48 (4), pp. 438-446.
Abstract
Cultivated peanut (Arachis hypogaea) is an allotetraploid with closely related subgenomes of a total size of ~2.7 Gb. This makes the
assembly of chromosomal pseudomolecules very challenging. As a foundation to understanding the genome of cultivated peanut, we
report the genome sequences of its diploid ancestors (Arachis duranensis and Arachis ipaensis). We show that these genomes are
similar to cultivated peanut's A and B subgenomes and use them to identify candidate disease resistance genes, to guide tetraploid
transcript assemblies and to detect genetic exchange between cultivated peanut's subgenomes. On the basis of remarkably high DNA
identity of the A. ipaensis genome and the B subgenome of cultivated peanut and biogeographic evidence, we conclude that A.
ipaensis may be a direct descendant of the same population that contributed the B subgenome to cultivated peanut.
