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Evolution of sex chromosomes prior to speciation in the dioecious Phoenix species
Ctr IRD, UMR DIADE, IRD CIRAD Palm Grp F2F, 911 Ave Agropolis, F-34394 Montpellier, France.;Univ Tunis El Manar, Fac Sci Tunis, Lab Genet Mol Immunol & Biotechnol, El Manar, Tunisia..
Univ Tunis El Manar, Fac Sci Tunis, Lab Genet Mol Immunol & Biotechnol, El Manar, Tunisia..
Ctr IRD, UMR DIADE, IRD CIRAD Palm Grp F2F, 911 Ave Agropolis, F-34394 Montpellier, France..
Ctr IRD, UMR DIADE, IRD CIRAD Palm Grp F2F, 911 Ave Agropolis, F-34394 Montpellier, France..
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2016 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 29, no 8, 1513-1522 p.Article in journal (Refereed) Published
Abstract [en]

Understanding the driving forces and molecular processes underlying dioecy and sex chromosome evolution, leading from hermaphroditism to the occurrence of male and female individuals, is of considerable interest in fundamental and applied research. The genus Phoenix, belonging to the Arecaceae family, consists uniquely of dioecious species. Phylogenetic data suggest that the genus Phoenix has diverged from a hermaphroditic ancestor which is also shared with its closest relatives. We have investigated the cessation of recombination in the sex-determination region within the genus Phoenix as a whole by extending the analysis of P.dactylifera SSR sex-related loci to eight other species within the genus. Phylogenetic analysis of a date palm sex-linked PdMYB1 gene in these species has revealed that sex-linked alleles have not clustered in a species-dependent way but rather in X and Y-allele clusters. Our data show that sex chromosomes evolved from a common autosomal origin before the diversification of the extant dioecious species.

Place, publisher, year, edition, pages
2016. Vol. 29, no 8, 1513-1522 p.
Keyword [en]
dioecy, recombination arrest, sex chromosomes, sex-linked gene, speciation
National Category
Genetics
Identifiers
URN: urn:nbn:se:uu:diva-304431DOI: 10.1111/jeb.12887ISI: 000382497400004PubMedID: 27118680OAI: oai:DiVA.org:uu-304431DiVA: diva2:1033131
Available from: 2016-10-05 Created: 2016-10-05 Last updated: 2017-11-30Bibliographically approved

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