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Article: Evolutionary divergence times in the Annonaceae: Evidence of a late Miocene origin of Pseuduvaria in Sundaland with subsequent diversification in New Guinea

TitleEvolutionary divergence times in the Annonaceae: Evidence of a late Miocene origin of Pseuduvaria in Sundaland with subsequent diversification in New Guinea
Authors
Issue Date2009
PublisherBioMed Central Ltd. The Journal's web site is located at http://www.biomedcentral.com/bmcevolbiol/
Citation
Bmc Evolutionary Biology, 2009, v. 9 n. 1 How to Cite?
AbstractBackground. Phylogenetic analyses of the Annonaceae consistently identify four clades: a basal clade consisting of Anaxagorea, and a small 'ambavioid' clade that is sister to two main clades, the 'long branch clade' (LBC) and 'short branch clade' (SBC). Divergence times in the family have previously been estimated using non-parametric rate smoothing (NPRS) and penalized likelihood (PL). Here we use an uncorrelated lognormal (UCLD) relaxed molecular clock in BEAST to estimate diversification times of the main clades within the family with a focus on the Asian genus Pseuduvaria within the SBC. Two fossil calibration points are applied, including the first use of the recently discovered Annonaceae fossil Futabanthus. The taxonomy and morphology of Pseuduvaria have been well documented, although no previous dating or biogeographical studies have been undertaken. Ancestral areas at internal nodes within Pseuduvaria are determined using dispersal-vicariance analysis (DIVA) and weighted ancestral area analysis (WAAA). Results. The divergence times of the main clades within the Annonaceae were found to deviate slightly from previous estimates that used different calibration points and dating methods. In particular, our estimate for the SBC crown (55.2-26.9 Mya) is much younger than previous estimates (62.5-53.1 ± 3.6 Mya and ca. 58.76 Mya). Early diversification of Pseuduvaria was estimated to have occurred 15-8 Mya, possibly associated with the 'mid-Miocene climatic optimum.' Pseuduvaria is inferred to have originated in Sundaland in the late Miocene, ca. 8 Mya; subsequent migration events were predominantly eastwards towards New Guinea and Australia, although several migratory reversals are also postulated. Speciation of Pseuduvaria within New Guinea may have occurred after ca. 6.5 Mya, possibly coinciding with the formation of the Central Range orogeny from ca. 8 Mya. Conclusion. Our divergence time estimates within the Annonaceae are likely to be more precise as we used a UCLD clock model and calibrated the phylogeny using new fossil evidence. Pseuduvaria is shown to have dispersed from Sundaland after the late Miocene. The present-day paleotropical distribution of Pseuduvaria may have been achieved by long-distance dispersal, and speciation events might be explained by global climatic oscillations, sea level fluctuations, and tectonic activity. © 2009 Su and Saunders; licensee BioMed Central Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/89340
ISSN
2015 Impact Factor: 3.406
2015 SCImago Journal Rankings: 2.053
PubMed Central ID
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSu, YCFen_HK
dc.contributor.authorSaunders, RMKen_HK
dc.date.accessioned2010-09-06T09:55:37Z-
dc.date.available2010-09-06T09:55:37Z-
dc.date.issued2009en_HK
dc.identifier.citationBmc Evolutionary Biology, 2009, v. 9 n. 1en_HK
dc.identifier.issn1471-2148en_HK
dc.identifier.urihttp://hdl.handle.net/10722/89340-
dc.description.abstractBackground. Phylogenetic analyses of the Annonaceae consistently identify four clades: a basal clade consisting of Anaxagorea, and a small 'ambavioid' clade that is sister to two main clades, the 'long branch clade' (LBC) and 'short branch clade' (SBC). Divergence times in the family have previously been estimated using non-parametric rate smoothing (NPRS) and penalized likelihood (PL). Here we use an uncorrelated lognormal (UCLD) relaxed molecular clock in BEAST to estimate diversification times of the main clades within the family with a focus on the Asian genus Pseuduvaria within the SBC. Two fossil calibration points are applied, including the first use of the recently discovered Annonaceae fossil Futabanthus. The taxonomy and morphology of Pseuduvaria have been well documented, although no previous dating or biogeographical studies have been undertaken. Ancestral areas at internal nodes within Pseuduvaria are determined using dispersal-vicariance analysis (DIVA) and weighted ancestral area analysis (WAAA). Results. The divergence times of the main clades within the Annonaceae were found to deviate slightly from previous estimates that used different calibration points and dating methods. In particular, our estimate for the SBC crown (55.2-26.9 Mya) is much younger than previous estimates (62.5-53.1 ± 3.6 Mya and ca. 58.76 Mya). Early diversification of Pseuduvaria was estimated to have occurred 15-8 Mya, possibly associated with the 'mid-Miocene climatic optimum.' Pseuduvaria is inferred to have originated in Sundaland in the late Miocene, ca. 8 Mya; subsequent migration events were predominantly eastwards towards New Guinea and Australia, although several migratory reversals are also postulated. Speciation of Pseuduvaria within New Guinea may have occurred after ca. 6.5 Mya, possibly coinciding with the formation of the Central Range orogeny from ca. 8 Mya. Conclusion. Our divergence time estimates within the Annonaceae are likely to be more precise as we used a UCLD clock model and calibrated the phylogeny using new fossil evidence. Pseuduvaria is shown to have dispersed from Sundaland after the late Miocene. The present-day paleotropical distribution of Pseuduvaria may have been achieved by long-distance dispersal, and speciation events might be explained by global climatic oscillations, sea level fluctuations, and tectonic activity. © 2009 Su and Saunders; licensee BioMed Central Ltd.en_HK
dc.languageengen_HK
dc.publisherBioMed Central Ltd. The Journal's web site is located at http://www.biomedcentral.com/bmcevolbiol/en_HK
dc.relation.ispartofBMC Evolutionary Biologyen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_HK
dc.subject.meshAnnonaceae - genetics-
dc.subject.meshDNA, Plant - genetics-
dc.subject.meshEvolution, Molecular-
dc.subject.meshGenetic Speciation-
dc.subject.meshPhylogeny-
dc.titleEvolutionary divergence times in the Annonaceae: Evidence of a late Miocene origin of Pseuduvaria in Sundaland with subsequent diversification in New Guineaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1471-2148&volume=9&spage=art. 153 (19 pp)&epage=&date=2009&atitle=Evolutionary+divergence+times+in+the+Annonaceae:+evidence+of+a+late+Miocene+origin+of+Pseuduvaria+in+Sundaland+with+subsequent+diversification+in+New+Guineaen_HK
dc.identifier.emailSaunders, RMK: saunders@hkucc.hku.hken_HK
dc.identifier.authoritySaunders, RMK=rp00774en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1186/1471-2148-9-153en_HK
dc.identifier.pmid19573225-
dc.identifier.pmcidPMC2722625-
dc.identifier.scopuseid_2-s2.0-68849131794en_HK
dc.identifier.hkuros162861en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-68849131794&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume9en_HK
dc.identifier.issue1en_HK
dc.identifier.isiWOS:000269467700001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridSu, YCF=7404456219en_HK
dc.identifier.scopusauthoridSaunders, RMK=35345489600en_HK
dc.identifier.citeulike5117196-

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