Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.)
Despite the importance of sweet potato as a food crop, its evolutionary history has been poorly investigated. The geographical and botanical origins of sweet potato remain unclear. Sweet potato is in the section Batatas of the genus, which also includes 13 wild relatives, almost all endemic to the Americas. I. batatas is not known in the wild state. Morphological and genetic analyses indicate that I. trifida is sweet potato¿s closest wild relative, but the genomic composition of I. batatas is still debated. It is still unclear whether this hexaploid is auto-, allo- or auto-allopolyploid. The range of I. trifida extends from northern Peru to Mexico, and the assumed region of origin of I. batatas is somewhere within this vast geographical area. I. trifida forms a complex of ecotypes of differing ploidy levels (diploids to hexaploids), but the distribution and origin of populations of varying ploidy levels are not documented. Morever, no genetic studies have been conducted to determine the relationships between different wild populations of I. trifida and the cultivated I. batatas, which could allow inference of sweet potato¿s region(s) of origin. Finally, a major domesticated trait of I. batatas is its capacity to produce edible storage roots. Some I. trifida are known to form small tuberous roots, but these have not been studied in any depth. The purpose of our study is to investigate the origin of sweet potato and particularly the role of polyploidization in its domestication history. A set of 180 I. trifida populations and 450 sweet potato landraces, distributed from Peru to Mexico, were chosen from the collection of the International Potato Center (CIP, Lima, Peru). Morphological characterisation of these plants is in progress, as well as genetic analyses using neutral chloroplast markers. We plan to evaluate ploidy levels of these different wild and cultivated samples by flow cytometry and study the genome composition of representatives of ploidy groups by genomic in situ hybridization. These analyses should lead to advances in the reconstruction of sweet potato¿s evolutionary history. (Texte intégral)
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dig-cirad-fr-5512492015-09-09T18:54:40Z http://agritrop.cirad.fr/551249/ http://agritrop.cirad.fr/551249/ Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.). Roullier Caroline, McKey Doyle B., Lebot Vincent. 2009. In : International Conference on Polyploidy, Hybridization and Biodiversity, May 17 - 20, 2009, Saint-Malo, France, program and abstracts. Université de Rennes 1. Rennes : Université de Rennes 1, Résumé, 185. International Conference on Polyploidy, Hybridization and Biodiversity, Saint-Malo, France, 17 Mai 2009/20 Mai 2009. Researchers Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) Roullier, Caroline McKey, Doyle B. Lebot, Vincent eng 2009 Université de Rennes 1 International Conference on Polyploidy, Hybridization and Biodiversity, May 17 - 20, 2009, Saint-Malo, France, program and abstracts F70 - Taxonomie végétale et phytogéographie F30 - Génétique et amélioration des plantes Ipomoea batatas http://aims.fao.org/aos/agrovoc/c_3937 Despite the importance of sweet potato as a food crop, its evolutionary history has been poorly investigated. The geographical and botanical origins of sweet potato remain unclear. Sweet potato is in the section Batatas of the genus, which also includes 13 wild relatives, almost all endemic to the Americas. I. batatas is not known in the wild state. Morphological and genetic analyses indicate that I. trifida is sweet potato¿s closest wild relative, but the genomic composition of I. batatas is still debated. It is still unclear whether this hexaploid is auto-, allo- or auto-allopolyploid. The range of I. trifida extends from northern Peru to Mexico, and the assumed region of origin of I. batatas is somewhere within this vast geographical area. I. trifida forms a complex of ecotypes of differing ploidy levels (diploids to hexaploids), but the distribution and origin of populations of varying ploidy levels are not documented. Morever, no genetic studies have been conducted to determine the relationships between different wild populations of I. trifida and the cultivated I. batatas, which could allow inference of sweet potato¿s region(s) of origin. Finally, a major domesticated trait of I. batatas is its capacity to produce edible storage roots. Some I. trifida are known to form small tuberous roots, but these have not been studied in any depth. The purpose of our study is to investigate the origin of sweet potato and particularly the role of polyploidization in its domestication history. A set of 180 I. trifida populations and 450 sweet potato landraces, distributed from Peru to Mexico, were chosen from the collection of the International Potato Center (CIP, Lima, Peru). Morphological characterisation of these plants is in progress, as well as genetic analyses using neutral chloroplast markers. We plan to evaluate ploidy levels of these different wild and cultivated samples by flow cytometry and study the genome composition of representatives of ploidy groups by genomic in situ hybridization. These analyses should lead to advances in the reconstruction of sweet potato¿s evolutionary history. (Texte intégral) conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/551249/1/document_551249.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=205303 |
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F70 - Taxonomie végétale et phytogéographie F30 - Génétique et amélioration des plantes Ipomoea batatas http://aims.fao.org/aos/agrovoc/c_3937 F70 - Taxonomie végétale et phytogéographie F30 - Génétique et amélioration des plantes Ipomoea batatas http://aims.fao.org/aos/agrovoc/c_3937 |
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F70 - Taxonomie végétale et phytogéographie F30 - Génétique et amélioration des plantes Ipomoea batatas http://aims.fao.org/aos/agrovoc/c_3937 F70 - Taxonomie végétale et phytogéographie F30 - Génétique et amélioration des plantes Ipomoea batatas http://aims.fao.org/aos/agrovoc/c_3937 Roullier, Caroline McKey, Doyle B. Lebot, Vincent Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) |
description |
Despite the importance of sweet potato as a food crop, its evolutionary history has been poorly investigated. The geographical and botanical origins of sweet potato remain unclear. Sweet potato is in the section Batatas of the genus, which also includes 13 wild relatives, almost all endemic to the Americas. I. batatas is not known in the wild state. Morphological and genetic analyses indicate that I. trifida is sweet potato¿s closest wild relative, but the genomic composition of I. batatas is still debated. It is still unclear whether this hexaploid is auto-, allo- or auto-allopolyploid. The range of I. trifida extends from northern Peru to Mexico, and the assumed region of origin of I. batatas is somewhere within this vast geographical area. I. trifida forms a complex of ecotypes of differing ploidy levels (diploids to hexaploids), but the distribution and origin of populations of varying ploidy levels are not documented. Morever, no genetic studies have been conducted to determine the relationships between different wild populations of I. trifida and the cultivated I. batatas, which could allow inference of sweet potato¿s region(s) of origin. Finally, a major domesticated trait of I. batatas is its capacity to produce edible storage roots. Some I. trifida are known to form small tuberous roots, but these have not been studied in any depth. The purpose of our study is to investigate the origin of sweet potato and particularly the role of polyploidization in its domestication history. A set of 180 I. trifida populations and 450 sweet potato landraces, distributed from Peru to Mexico, were chosen from the collection of the International Potato Center (CIP, Lima, Peru). Morphological characterisation of these plants is in progress, as well as genetic analyses using neutral chloroplast markers. We plan to evaluate ploidy levels of these different wild and cultivated samples by flow cytometry and study the genome composition of representatives of ploidy groups by genomic in situ hybridization. These analyses should lead to advances in the reconstruction of sweet potato¿s evolutionary history. (Texte intégral) |
format |
conference_item |
topic_facet |
F70 - Taxonomie végétale et phytogéographie F30 - Génétique et amélioration des plantes Ipomoea batatas http://aims.fao.org/aos/agrovoc/c_3937 |
author |
Roullier, Caroline McKey, Doyle B. Lebot, Vincent |
author_facet |
Roullier, Caroline McKey, Doyle B. Lebot, Vincent |
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Roullier, Caroline |
title |
Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) |
title_short |
Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) |
title_full |
Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) |
title_fullStr |
Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) |
title_full_unstemmed |
Domestication history of a hexaploid, the sweet potato (Ipomoea batatas (L.) Lam.) |
title_sort |
domestication history of a hexaploid, the sweet potato (ipomoea batatas (l.) lam.) |
publisher |
Université de Rennes 1 |
url |
http://agritrop.cirad.fr/551249/ http://agritrop.cirad.fr/551249/1/document_551249.pdf |
work_keys_str_mv |
AT roulliercaroline domesticationhistoryofahexaploidthesweetpotatoipomoeabatatasllam AT mckeydoyleb domesticationhistoryofahexaploidthesweetpotatoipomoeabatatasllam AT lebotvincent domesticationhistoryofahexaploidthesweetpotatoipomoeabatatasllam |
_version_ |
1758022179232940032 |