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dc.contributor.authorPailles, Yveline
dc.contributor.authorShwen, Ho
dc.contributor.authorPires, Inês S.
dc.contributor.authorTester, Mark A.
dc.contributor.authorNegrão, Sónia
dc.contributor.authorSchmöcke, Sandra M.
dc.date.accessioned2017-02-28T12:11:06Z
dc.date.available2017-02-28T12:11:06Z
dc.date.issued2017-02-15
dc.identifier.citationPailles Y, Ho S, Pires IS, Tester M, Negrão S, et al. (2017) Genetic Diversity and Population Structure of Two Tomato Species from the Galapagos Islands. Frontiers in Plant Science 8. Available: http://dx.doi.org/10.3389/fpls.2017.00138.
dc.identifier.issn1664-462X
dc.identifier.doi10.3389/fpls.2017.00138
dc.identifier.urihttp://hdl.handle.net/10754/622946
dc.description.abstractEndemic flora of the Galapagos Islands has adapted to thrive in harsh environmental conditions. The wild tomato species from the Galapagos Islands, Solanum cheesmaniae and S. galapagense, are tolerant to various stresses, and can be crossed with cultivated tomato. However, information about genetic diversity and relationships within and between populations is necessary to use these resources efficiently in plant breeding. In this study, we analyzed 3,974 polymorphic SNP markers, obtained through the genotyping-by-sequencing technique, DArTseq, to elucidate the genetic diversity and population structure of 67 accessions of Galapagos tomatoes (compared to two S. lycopersicum varieties and one S. pimpinellifolium accession). Two clustering methods, Principal Component Analysis and STRUCTURE, showed clear distinction between the two species and a subdivision in the S. cheesmaniae group corresponding to geographical origin and age of the islands. High genetic variation among the accessions within each species was suggested by the AMOVA. High diversity in the S. cheesmaniae group and its correlation with the islands of origin were also suggested. This indicates a possible influence of the movement of the islands, from west to east, on the gene flow. Additionally, the absence of S. galapagense populations in the eastern islands points to the species divergence occurring after the eastern islands became isolated. Based on these results, it can be concluded that the population structure of the Galapagos tomatoes collection partially explains the evolutionary history of both species, knowledge that facilitates exploitation of their genetic potential for the identification of novel alleles contributing to stress tolerance.
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
dc.publisherFrontiers Media SA
dc.relation.urlhttp://journal.frontiersin.org/article/10.3389/fpls.2017.00138/full
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBiogeography
dc.subjectGalapagos Islands
dc.subjectGenetic diversity
dc.subjectGenotyping-by-sequencing
dc.subjectSolanum cheesmaniae
dc.subjectSolanum galapagense
dc.subjectTomato
dc.subjectWild relatives
dc.titleGenetic Diversity and Population Structure of Two Tomato Species from the Galapagos Islands
dc.typeArticle
dc.contributor.departmentBiological and Environmental Science and Engineering (BESE) Division
dc.contributor.departmentCenter for Desert Agriculture
dc.contributor.departmentComputational Bioscience Research Center (CBRC)
dc.contributor.departmentPlant Science
dc.contributor.departmentThe Salt Lab
dc.identifier.journalFrontiers in Plant Science
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionGenomics of Plants Stress Unit, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa and Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
dc.contributor.institutionDepartment of Biology and Center for Genomics and Systems Biology, New York University, New York, NY, United States
kaust.personPailles, Yveline
kaust.personShwen, Ho
kaust.personTester, Mark A.
kaust.personNegrão, Sónia
kaust.personSchmöcke, Sandra M.
refterms.dateFOA2018-06-13T16:45:07Z


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This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.