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.

Details

Title
Genome sequences of two diploid wild relatives of cultivated sweetpotato reveal targets for genetic improvement
Author
Wu, Shan 1   VIAFID ORCID Logo  ; Lau, Kin H 2   VIAFID ORCID Logo  ; Cao, Qinghe 3 ; Hamilton, John P 2   VIAFID ORCID Logo  ; Sun, Honghe 4 ; Zhou, Chenxi 5   VIAFID ORCID Logo  ; Eserman, Lauren 6 ; Gemenet, Dorcus C 7   VIAFID ORCID Logo  ; Olukolu, Bode A 8 ; Wang, Haiyan 9 ; Crisovan, Emily 2 ; Godden, Grant T 2 ; Chen, Jiao 1 ; Wang, Xin 1 ; Kitavi, Mercy 10   VIAFID ORCID Logo  ; Manrique-Carpintero, Norma 2 ; Vaillancourt, Brieanne 2 ; Wiegert-Rininger, Krystle 2   VIAFID ORCID Logo  ; Yang, Xinsun 11 ; Bao, Kan 1 ; Schaff, Jennifer 12 ; Kreuze, Jan 7   VIAFID ORCID Logo  ; Gruneberg, Wolfgang 7 ; Khan, Awais 13 ; Ghislain, Marc 10 ; Ma, Daifu 14 ; Jiang, Jiming 9 ; Mwanga, Robert O M 15 ; Leebens-Mack, Jim 16   VIAFID ORCID Logo  ; Coin, Lachlan J M 5   VIAFID ORCID Logo  ; Yencho, G Craig 17 ; Buell, C Robin 18 ; Zhangjun Fei 19   VIAFID ORCID Logo 

 Boyce Thompson Institute, Cornell University, Ithaca, NY, USA 
 Department of Plant Biology, Michigan State University, East Lansing, MI, USA 
 Boyce Thompson Institute, Cornell University, Ithaca, NY, USA; Jiangsu Xuzhou Sweetpotato Research Center, Xuzhou, Jiangsu, China 
 Boyce Thompson Institute, Cornell University, Ithaca, NY, USA; National Engineering Research Center for Vegetables, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China 
 Institute for Molecular Bioscience, University of Queensland, St Lucia, Brisbane, QLD, Australia 
 Department of Plant Biology, University of Georgia, Athens, GA, USA; Department of Conservation and Research, Atlanta Botanical Garden, Atlanta, GA, USA 
 International Potato Center, Lima 12, Peru 
 Department of Horticultural Science, North Carolina State University, Raleigh, NC, USA; Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, USA 
 Department of Plant Biology, Michigan State University, East Lansing, MI, USA; Department of Horticulture, Michigan State University, East Lansing, MI, USA 
10  International Potato Center, Nairobi, Kenya 
11  Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China 
12  Genomic Sciences Laboratory, North Carolina State University, Raleigh, NC, USA 
13  International Potato Center, Lima 12, Peru; Plant Pathology and Plant-Microbe Biology Section, Cornell University, Geneva, NY, USA 
14  Jiangsu Xuzhou Sweetpotato Research Center, Xuzhou, Jiangsu, China 
15  International Potato Center, Kampala, Uganda 
16  Department of Plant Biology, University of Georgia, Athens, GA, USA 
17  Department of Horticultural Science, North Carolina State University, Raleigh, NC, USA 
18  Department of Plant Biology, Michigan State University, East Lansing, MI, USA; Plant Resilience Institute, Michigan State University, East Lansing, MI, USA 
19  Boyce Thompson Institute, Cornell University, Ithaca, NY, USA; USDA-ARS Robert W. Holley Center for Agriculture and Health, Ithaca, NY, USA 
Pages
1-12
Publication year
2018
Publication date
Nov 2018
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2128535253
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.