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dc.creatorKalinganire, Antoineen_US
dc.date2015-09-09en_US
dc.date.accessioned2016-02-28T12:50:39Z
dc.date.available2016-02-28T12:50:39Z
dc.identifierhttp://dx.doi.org/en_US
dc.identifierhttps://mel.cgiar.org/reporting/download/hash/IjA54liyen_US
dc.identifier.citationAntoine Kalinganire. (9/9/2015). Influence of putative forest refugia and biogeographic barriers on the level and distribution of genetic variation in an African savannah tree, Khaya senegalensis (Desr.) A. Juss. Tree Genetics & Genomes, .en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11766/4558
dc.description.abstractPhylogeographic studies of tropical and subtropical tree species provide an ideal method to study the role of forest refugia in the structuring of genetic diversity in contemporary populations To date most studies have examined rainforestdependent trees yet the influence of forest refugia on savannah forest and woodland trees remains poorly understood despite their potentially important role in forest assemblages during the last glacial maximum Here we examine the level and structuring of genetic diversity across the geographic range of the savannah woodland tree Khaya senegalensis African mahogany from Senegal to Uganda 5000 km and from the steppes of the Sahara desert to the fringes of Africas equatorial rainforests 700 km Three chloroplast cpDNA loci and 13 nuclear microsatellite nSSR loci were genotyped in 503 individuals Individualbased clustering of nSSR genotypes identified that all samples formed two populations that showed no pattern of geographic structuring Population level analysis of nSSR data revealed only very weak genetic structure FST0013 with most of the genetic diversity contained within populations Geographical differentiation GST0096 was low for the 14 haplotypes identified However whereas all haplotypes occurred in the western populations including Cameroon only two cosmopolitan haplotypes were found in centraleastern populations Geographically restricted lowfrequency haplotypes were found in eight western populations Higher genetic diversity in western populations was confirmed by patterns of allelic richness which were lower in centraleastern populations Taken together these results indicate that K senegalensis displays very little genetic differentiation across its geographic range and that previously identified barriers to dispersal across the northern savannah belt of tropical Africa eg the Dahomey Gap Mega Lake Chad and the Adamawa Highlands have not impeded contemporary gene dispersal in this species Nevertheless clustering of rare haplotypes indicates that the Dahomey Gap has likely been an important historical barrier to genetic connectivity between western and eastern regions of the species and that it is likely that this savannah tree also experienced range contraction around major forest refugial fringes or riparian incursions during the last glacial maximum LGMen_US
dc.languageenen_US
dc.rightsBen_US
dc.sourceTree Genetics & Genomes;(2015)en_US
dc.subjectAgroforestryen_US
dc.titleInfluence of putative forest refugia and biogeographic barriers on the level and distribution of genetic variation in an African savannah tree Khaya senegalensis Desr A Jussen_US
dc.typeJournal Articleen_US
cg.contributor.centerWorld Agroforestry Center (ICRAF)en_US
cg.contributor.crpCRP on Dryland Systems - DSen_US
cg.contributor.funderGovernament of Finlanden_US
cg.contributor.projectBuilding Biocarbon and Rural Development in West Africa - BIODEVen_US
cg.contributor.project-lead-instituteWorld Agroforestry Center (ICRAF)en_US
cg.coverage.regionEastern Africaen_US
cg.coverage.countryAngolaen_US
cg.coverage.countryBeninen_US
cg.coverage.countryBotswanaen_US
cg.coverage.countryBurundien_US
cg.coverage.countryCameroonen_US
cg.coverage.countryCentral African Republicen_US
cg.coverage.countryChaden_US
cg.coverage.countryCongo DRCen_US
cg.coverage.countryCôte d`Ivoireen_US
cg.coverage.countryEthiopiaen_US
cg.coverage.countryGhanaen_US
cg.coverage.countryGuineaen_US
cg.coverage.countryKenyaen_US
cg.coverage.countryLiberiaen_US
cg.coverage.countryMalawien_US
cg.coverage.countryMozambiqueen_US
cg.coverage.countryNigeriaen_US
cg.coverage.countryRwandaen_US
cg.coverage.countrySierra Leoneen_US
cg.coverage.countrySomaliaen_US
cg.coverage.countrySouth Africaen_US
cg.coverage.countrySudanen_US
cg.coverage.countryTanzaniaen_US
cg.coverage.countryTogoen_US
cg.coverage.countryUgandaen_US
cg.coverage.countryZambiaen_US
cg.coverage.countryZimbabween_US
cg.coverage.admin-uniten_US
cg.contacta.kalinganire@cgiar.orgen_US
dc.identifier.statusOpen accessen_US
cg.countryAngolaen_US
cg.countryBeninen_US
cg.countryBotswanaen_US
cg.countryBurundien_US
cg.countryCameroonen_US
cg.countryCentral African Republicen_US
cg.countryChaden_US
cg.countryCongo DRCen_US
cg.countryCôte d`Ivoireen_US
cg.countryEthiopiaen_US
cg.countryGhanaen_US
cg.countryGuineaen_US
cg.countryKenyaen_US
cg.countryLiberiaen_US
cg.countryMalawien_US
cg.countryMozambiqueen_US
cg.countryNigeriaen_US
cg.countryRwandaen_US
cg.countrySierra Leoneen_US
cg.countrySomaliaen_US
cg.countrySouth Africaen_US
cg.countrySudanen_US
cg.countryTanzaniaen_US
cg.countryTogoen_US
cg.countryUgandaen_US
cg.countryZambiaen_US
cg.countryZimbabween_US


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