Genome sequences of two diploid wild relatives of cultivated sweetpotato reveal targets for genetic improvement
2018
honghe sun | chenxi zhou | jim leebens-mack | awais khan | marc ghislain | jennifer schaff | lauren eserman | bode a. olukolu | kan bao | xin wang | norma manrique-carpintero | mercy kitavi | dorcus c. gemenet | daifu ma | wolfgang gruneberg | shan wu | brieanne vaillancourt | qinghe cao | john p. hamilton | emily crisovan | jiming jiang | g. craig yencho | xinsun yang | chen jiao | lachlan j. m. coin | grant t. godden | c. robin buell | jan kreuze | robert o. m. mwanga | krystle wiegert-rininger | kin h. lau | zhangjun fei | haiyan wang
Shan Wu et al., 'Genome sequences of two diploid wild relatives of cultivated sweetpotato reveal targets for genetic improvement', Nature Communications, vol. 9(1), p.12, Springer Nature, 2018
Show more [+] Less [-]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 genomeenabled breeding in this important food security crop
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