Genome sequences of two diploid wild relatives of cultivated sweetpotato reveal targets for genetic improvement

Shan Wu, Kin H. Lau, Qinghe Cao, John P. Hamilton, Honghe Sun, Chenxi Zhou, Lauren Eserman, Dorcus C. Gemenet, Bode A. Olukolu, Haiyan Wang, Emily Crisovan, Grant T. Godden, Chen Jiao, Xin Wang, Mercy Kitavi, Norma Manrique-Carpintero, Brieanne Vaillancourt, Krystle Wiegert-Rininger, Xinsun Yang, Kan Bao, Jennifer Schaff, Jan Kreuze, Wolfgang Gruneberg, Awais Khan, Marc Ghislain, Daifu Ma, Jiming Jiang, Robert O. M. Mwanga, Jim Leebens-Mack, Lachlan J. M. Coin, G. Craig Yencho, C. Robin Buell () and Zhangjun Fei ()
Additional contact information
Shan Wu: Cornell University
Kin H. Lau: Michigan State University
Qinghe Cao: Cornell University
John P. Hamilton: Michigan State University
Honghe Sun: Cornell University
Chenxi Zhou: University of Queensland, St Lucia
Lauren Eserman: University of Georgia
Dorcus C. Gemenet: International Potato Center
Bode A. Olukolu: North Carolina State University
Haiyan Wang: Michigan State University
Emily Crisovan: Michigan State University
Grant T. Godden: Michigan State University
Chen Jiao: Cornell University
Xin Wang: Cornell University
Mercy Kitavi: International Potato Center
Norma Manrique-Carpintero: Michigan State University
Brieanne Vaillancourt: Michigan State University
Krystle Wiegert-Rininger: Michigan State University
Xinsun Yang: Food Crops Institute, Hubei Academy of Agricultural Sciences
Kan Bao: Cornell University
Jennifer Schaff: North Carolina State University
Jan Kreuze: International Potato Center
Wolfgang Gruneberg: International Potato Center
Awais Khan: International Potato Center
Marc Ghislain: International Potato Center
Daifu Ma: Jiangsu Xuzhou Sweetpotato Research Center
Jiming Jiang: Michigan State University
Robert O. M. Mwanga: International Potato Center
Jim Leebens-Mack: University of Georgia
Lachlan J. M. Coin: University of Queensland, St Lucia
G. Craig Yencho: North Carolina State University
C. Robin Buell: Michigan State University
Zhangjun Fei: Cornell University

Nature Communications, 2018, vol. 9, issue 1, 1-12

Abstract: Abstract Sweetpotato [Ipomoea batatas (L.) Lam.] is a globally important staple food crop, especially for sub-Saharan Africa. Agronomic improvement of sweetpotato has lagged behind other major food crops due to a lack of genomic and genetic resources and inherent challenges in breeding a heterozygous, clonally propagated polyploid. Here, we report the genome sequences of its two diploid relatives, I. trifida and I. triloba, and show that these high-quality genome assemblies are robust references for hexaploid sweetpotato. Comparative and phylogenetic analyses reveal insights into the ancient whole-genome triplication history of Ipomoea and evolutionary relationships within the Batatas complex. Using resequencing data from 16 genotypes widely used in African breeding programs, genes and alleles associated with carotenoid biosynthesis in storage roots are identified, which may enable efficient breeding of varieties with high provitamin A content. These resources will facilitate genome-enabled breeding in this important food security crop.

Date: 2018
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DOI: 10.1038/s41467-018-06983-8

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