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dc.contributor.authorPicq, Sandrine
dc.contributor.authorSantoni, Sylvain
dc.contributor.authorLacombe, Thierry
dc.contributor.authorLatreille, Muriel
dc.contributor.authorWeber, Audrey
dc.contributor.authorArdisson, Morgane
dc.contributor.authorIvorra, Sarah
dc.contributor.authorMaghradze, David
dc.contributor.authorArroyo-Garcia, Rosa
dc.contributor.authorChatelet, Philippe
dc.contributor.authorThis, Patrice
dc.contributor.authorTerral, Jean-Frédéric
dc.contributor.authorBacilieri, Roberto
dc.date.accessioned2014-10-09T18:10:49Z
dc.date.available2014-10-09T18:10:49Z
dc.date.issued2014-09-03
dc.identifier.citationBMC Plant Biology. 2014 Sep 03;14(1):229
dc.identifier.urihttp://dx.doi.org/10.1186/s12870-014-0229-z
dc.identifier.urihttp://hdl.handle.net/10724/30551
dc.description.abstractAbstract Background In Vitis vinifera L., domestication induced a dramatic change in flower morphology: the wild sylvestris subspecies is dioecious while hermaphroditism is largely predominant in the domesticated subsp. V. v. vinifera. The characterisation of polymorphisms in genes underlying the sex-determining chromosomal region may help clarify the history of domestication in grapevine and the evolution of sex chromosomes in plants. In the genus Vitis, sex determination is putatively controlled by one major locus with three alleles, male M, hermaphrodite H and female F, with an allelic dominance M > H > F. Previous genetic studies located the sex locus on chromosome 2. We used DNA polymorphisms of geographically diverse V. vinifera genotypes to confirm the position of this locus, to characterise the genetic diversity and traces of selection in candidate genes, and to explore the origin of hermaphroditism. Results In V. v. sylvestris, a sex-determining region of 154.8 kb, also present in other Vitis species, spans less than 1% of chromosome 2. It displays haplotype diversity, linkage disequilibrium and differentiation that typically correspond to a small XY sex-determining region with XY males and XX females. In male alleles, traces of purifying selection were found for a trehalose phosphatase, an exostosin and a WRKY transcription factor, with strikingly low polymorphism levels between distant geographic regions. Both diversity and network analysis revealed that H alleles are more closely related to M than to F alleles. Conclusions Hermaphrodite alleles appear to derive from male alleles of wild grapevines, with successive recombination events allowing import of diversity from the X into the Y chromosomal region and slowing down the expansion of the region into a full heteromorphic chromosome. Our data are consistent with multiple domestication events and show traces of introgression from other Asian Vitis species into the cultivated grapevine gene pool.
dc.titleA small XY chromosomal region explains sex determination in wild dioecious V. vinifera and the reversal to hermaphroditism in domesticated grapevines
dc.typeJournal Article
dc.date.updated2014-09-18T19:09:13Z
dc.description.versionPeer Reviewed
dc.language.rfc3066en
dc.rights.holderSandrine Picq et al.; licensee BioMed Central Ltd.


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