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Author (up) Veron, V.; Caron, H.; Degen, B. openurl 
  Title Gene flow and mating system of the tropical tree Sextonia rubra Type Journal Article
  Year 2005 Publication Silvae Genetica Abbreviated Journal Silvae Genet.  
  Volume 54 Issue 6 Pages 275-280  
  Keywords genetic diversity; gene flow; heterozygosity; microsatellites; mixed mating; tropical tree; twogener  
  Abstract In 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 (Phi(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.  
  Address INRA, UMR, ECOFOG, Kourou 9738, French Guiana, Email:  
  Corporate Author Thesis  
  Publisher J D SAUERLANDERS VERLAG Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0037-5349 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000235239400005 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 182  
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