Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).

Sweet potato (Ipomoea batatas (L.) Lam., Convolvulaceae) counts among the most widely cultivated staple crops worldwide, yet the origins of its domestication remain unclear. This hexaploid species could have had either an autopolyploid origin, from the diploid I. trifida, or an allopolyploid origin,...

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Autores principales:	Caroline Roullier, Anne Duputié, Paul Wennekes, Laure Benoit, Víctor Manuel Fernández Bringas, Genoveva Rossel, David Tay, Doyle McKey, Vincent Lebot
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ee966d8a0b4c447f8a24f096e44397a9
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spelling	oai:doaj.org-article:ee966d8a0b4c447f8a24f096e44397a92021-11-18T07:44:16ZDisentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).1932-620310.1371/journal.pone.0062707https://doaj.org/article/ee966d8a0b4c447f8a24f096e44397a92013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23723970/?tool=EBIhttps://doaj.org/toc/1932-6203Sweet potato (Ipomoea batatas (L.) Lam., Convolvulaceae) counts among the most widely cultivated staple crops worldwide, yet the origins of its domestication remain unclear. This hexaploid species could have had either an autopolyploid origin, from the diploid I. trifida, or an allopolyploid origin, involving genomes of I. trifida and I. triloba. We generated molecular genetic data for a broad sample of cultivated sweet potatoes and its diploid and polyploid wild relatives, for noncoding chloroplast and nuclear ITS sequences, and nuclear SSRs. Our data did not support an allopolyploid origin for I. batatas, nor any contribution of I. triloba in the genome of domesticated sweet potato. I. trifida and I. batatas are closely related although they do not share haplotypes. Our data support an autopolyploid origin of sweet potato from the ancestor it shares with I. trifida, which might be similar to currently observed tetraploid wild Ipomoea accessions. Two I. batatas chloroplast lineages were identified. They show more divergence with each other than either does with I. trifida. We thus propose that cultivated I. batatas have multiple origins, and evolved from at least two distinct autopolyploidization events in polymorphic wild populations of a single progenitor species. Secondary contact between sweet potatoes domesticated in Central America and in South America, from differentiated wild I. batatas populations, would have led to the introgression of chloroplast haplotypes of each lineage into nuclear backgrounds of the other, and to a reduced divergence between nuclear gene pools as compared with chloroplast haplotypes.Caroline RoullierAnne DuputiéPaul WennekesLaure BenoitVíctor Manuel Fernández BringasGenoveva RosselDavid TayDoyle McKeyVincent LebotPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 5, p e62707 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Caroline Roullier Anne Duputié Paul Wennekes Laure Benoit Víctor Manuel Fernández Bringas Genoveva Rossel David Tay Doyle McKey Vincent Lebot Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).
description	Sweet potato (Ipomoea batatas (L.) Lam., Convolvulaceae) counts among the most widely cultivated staple crops worldwide, yet the origins of its domestication remain unclear. This hexaploid species could have had either an autopolyploid origin, from the diploid I. trifida, or an allopolyploid origin, involving genomes of I. trifida and I. triloba. We generated molecular genetic data for a broad sample of cultivated sweet potatoes and its diploid and polyploid wild relatives, for noncoding chloroplast and nuclear ITS sequences, and nuclear SSRs. Our data did not support an allopolyploid origin for I. batatas, nor any contribution of I. triloba in the genome of domesticated sweet potato. I. trifida and I. batatas are closely related although they do not share haplotypes. Our data support an autopolyploid origin of sweet potato from the ancestor it shares with I. trifida, which might be similar to currently observed tetraploid wild Ipomoea accessions. Two I. batatas chloroplast lineages were identified. They show more divergence with each other than either does with I. trifida. We thus propose that cultivated I. batatas have multiple origins, and evolved from at least two distinct autopolyploidization events in polymorphic wild populations of a single progenitor species. Secondary contact between sweet potatoes domesticated in Central America and in South America, from differentiated wild I. batatas populations, would have led to the introgression of chloroplast haplotypes of each lineage into nuclear backgrounds of the other, and to a reduced divergence between nuclear gene pools as compared with chloroplast haplotypes.
format	article
author	Caroline Roullier Anne Duputié Paul Wennekes Laure Benoit Víctor Manuel Fernández Bringas Genoveva Rossel David Tay Doyle McKey Vincent Lebot
author_facet	Caroline Roullier Anne Duputié Paul Wennekes Laure Benoit Víctor Manuel Fernández Bringas Genoveva Rossel David Tay Doyle McKey Vincent Lebot
author_sort	Caroline Roullier
title	Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).
title_short	Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).
title_full	Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).
title_fullStr	Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).
title_full_unstemmed	Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).
title_sort	disentangling the origins of cultivated sweet potato (ipomoea batatas (l.) lam.).
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/ee966d8a0b4c447f8a24f096e44397a9
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Disentangling the origins of cultivated sweet potato (Ipomoea batatas (L.) Lam.).

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