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hal.structure.identifierEcologie des forêts de Guyane [UMR ECOFOG]
dc.contributor.authorVERON, V.
hal.structure.identifierBiodiversité, Gènes et Ecosystèmes [BioGeCo]
dc.contributor.authorCARON, H.
dc.contributor.authorDEGEN, B.
dc.date.issued2005-05-01
dc.identifier.issn0037-5349
dc.description.abstractEnIn this paper we report a study of the mating system and gene flow of Sextonia rubra, a hermaphroditic, insect pollinated tropical tree species with a geographic distribution in the Guyana Plateau and the Amazon. Using five microsatellites we analysed 428 seeds of 27 open pollinated families at the experimental site "Paracou" in French Guiana. We observed, compared to other tropical tree species, a high level of genetic diversity. We estimated parameters of the mating system and gene flow by using the mixed mating model and the TwoGener approach. The estimated multilocus outcrossing rate, t m , was 0.992 indicating nearly complete outcrossing. A significant level of biparental inbreeding and a small proportion of full-sibs were estimated for the 27 seed arrays. The differentiation of allelic frequencies among the pollen pools was Φ FT = 0.061. We estimated mean pollen dispersal distances between 65 m and 89 m according to the dispersal models used. The joint estimation of pollen dispersal and density of reproductive trees gave an effective density estimate of 2.1-2.2 trees/ha.
dc.language.isoen
dc.subject.enGenetic diversity
dc.subject.engene flow
dc.subject.enheterozygosity
dc.subject.enmicrosatellites
dc.subject.enmixed mating
dc.subject.entropical tree
dc.subject.entwogener
dc.title.enGene flow and mating system of the tropical tree Sextonia rubra
dc.typeArticle de revue
dc.identifier.doi10.1515/sg-2005-0040
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalSilvae Genetica
bordeaux.peerReviewedoui
hal.identifierhal-03695212
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03695212v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Silvae%20Genetica&rft.date=2005-05-01&rft.eissn=0037-5349&rft.issn=0037-5349&rft.au=VERON,%20V.&CARON,%20H.&DEGEN,%20B.&rft.genre=article


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