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Article: A plastid DNA phylogeny of Dasymaschalon (Annonaceae) and allied genera: Evidence for generic non-monophyly and the parallel evolutionary loss of inner petals
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TitleA plastid DNA phylogeny of Dasymaschalon (Annonaceae) and allied genera: Evidence for generic non-monophyly and the parallel evolutionary loss of inner petals
 
AuthorsWang, J2
Thomas, DC2
Su, YCF
Meinke, S4
Chatrou, LW3
Saunders, RMK2
 
KeywordsAnnonaceae
Character evolution
Dasymaschalon
Flower morphology
Friesodielsia
Phylogeny
 
Issue Date2012
 
PublisherInternational Association for Plant Taxonomy. The Journal's web site is located at http://www.iapt-taxon.org/
 
CitationTaxon, 2012, v. 61 n. 3, p. 545-558 [How to Cite?]
 
AbstractDasymaschalon and the closely related genera Desmos, Friesodielsia and Monanthotaxis together comprise ca. 170 species of trees, shrubs and woody climbers distributed in tropical Africa and tropical Asia. These genera form the desmoid clade, which, because of the presence of diverse flower and fruit syndromes including different types of pollination chambers and moniliform monocarps, offers an opportunity to investigate potentially ecologically significant shifts in flower and fruit characters. Despite its morphological diversity, however, generic delimitation within the desmoid clade is problematic and the intergeneric relationships of the constituent genera are only poorly understood. Bayesian, maximum likelihood and maximum parsimony analyses of plastid DNA sequence data (matK, psbA-trnH, ndhF, rbcL, trnL-F; ca. 5.4 kb; 52 taxa) were used to clarify phylogenetic relationships within the desmoid clade. The evolution and taxonomic utility of selected fruit and flower characters was investigated with likelihood and parsimony ancestral character reconstructions. The results indicate problems in the current delimitations of Dasymaschalon and Friesodielsia. Friesodielsia as currently circumscribed is polyphyletic, with African Friesodielsia species allied to the African genus Monanthotaxis, and only distantly related to Asian representatives. The majority of Dasymaschalon species form a strongly supported clade, but three species are more closely related to Asian species of Friesodielsia. Ancestral character reconstructions indicate that seed number and monocarp shape are of limited value in generic circumscriptions, and that the three-petalled corolla characteristic of Dasymaschalon evolved independently twice within the desmoid clade. Disruptions to homeotic gene expression or strong selective pressure for a partial enclosure of the mature stamens and carpels by the corolla are hypothesised to underlie the parallel evolution of pollination chambers formed by outer petal homologues subsequent to inner petal loss.
 
ISSN0040-0262
2013 Impact Factor: 3.051
2013 SCImago Journal Rankings: 0.860
 
ISI Accession Number IDWOS:000305439100005
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorWang, J
 
dc.contributor.authorThomas, DC
 
dc.contributor.authorSu, YCF
 
dc.contributor.authorMeinke, S
 
dc.contributor.authorChatrou, LW
 
dc.contributor.authorSaunders, RMK
 
dc.date.accessioned2012-07-16T09:59:49Z
 
dc.date.available2012-07-16T09:59:49Z
 
dc.date.issued2012
 
dc.description.abstractDasymaschalon and the closely related genera Desmos, Friesodielsia and Monanthotaxis together comprise ca. 170 species of trees, shrubs and woody climbers distributed in tropical Africa and tropical Asia. These genera form the desmoid clade, which, because of the presence of diverse flower and fruit syndromes including different types of pollination chambers and moniliform monocarps, offers an opportunity to investigate potentially ecologically significant shifts in flower and fruit characters. Despite its morphological diversity, however, generic delimitation within the desmoid clade is problematic and the intergeneric relationships of the constituent genera are only poorly understood. Bayesian, maximum likelihood and maximum parsimony analyses of plastid DNA sequence data (matK, psbA-trnH, ndhF, rbcL, trnL-F; ca. 5.4 kb; 52 taxa) were used to clarify phylogenetic relationships within the desmoid clade. The evolution and taxonomic utility of selected fruit and flower characters was investigated with likelihood and parsimony ancestral character reconstructions. The results indicate problems in the current delimitations of Dasymaschalon and Friesodielsia. Friesodielsia as currently circumscribed is polyphyletic, with African Friesodielsia species allied to the African genus Monanthotaxis, and only distantly related to Asian representatives. The majority of Dasymaschalon species form a strongly supported clade, but three species are more closely related to Asian species of Friesodielsia. Ancestral character reconstructions indicate that seed number and monocarp shape are of limited value in generic circumscriptions, and that the three-petalled corolla characteristic of Dasymaschalon evolved independently twice within the desmoid clade. Disruptions to homeotic gene expression or strong selective pressure for a partial enclosure of the mature stamens and carpels by the corolla are hypothesised to underlie the parallel evolution of pollination chambers formed by outer petal homologues subsequent to inner petal loss.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationTaxon, 2012, v. 61 n. 3, p. 545-558 [How to Cite?]
 
dc.identifier.epage558
 
dc.identifier.hkuros200462
 
dc.identifier.isiWOS:000305439100005
 
dc.identifier.issn0040-0262
2013 Impact Factor: 3.051
2013 SCImago Journal Rankings: 0.860
 
dc.identifier.issue3
 
dc.identifier.scopuseid_2-s2.0-84862316547
 
dc.identifier.spage545
 
dc.identifier.urihttp://hdl.handle.net/10722/153207
 
dc.identifier.volume61
 
dc.languageeng
 
dc.publisherInternational Association for Plant Taxonomy. The Journal's web site is located at http://www.iapt-taxon.org/
 
dc.publisher.placeAustria
 
dc.relation.ispartofTaxon
 
dc.relation.referencesReferences in Scopus
 
dc.subjectAnnonaceae
 
dc.subjectCharacter evolution
 
dc.subjectDasymaschalon
 
dc.subjectFlower morphology
 
dc.subjectFriesodielsia
 
dc.subjectPhylogeny
 
dc.titleA plastid DNA phylogeny of Dasymaschalon (Annonaceae) and allied genera: Evidence for generic non-monophyly and the parallel evolutionary loss of inner petals
 
dc.typeArticle
 
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<contributor.author>Chatrou, LW</contributor.author>
<contributor.author>Saunders, RMK</contributor.author>
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<description.abstract>Dasymaschalon and the closely related genera Desmos, Friesodielsia and Monanthotaxis together comprise ca. 170 species of trees, shrubs and woody climbers distributed in tropical Africa and tropical Asia. These genera form the desmoid clade, which, because of the presence of diverse flower and fruit syndromes including different types of pollination chambers and moniliform monocarps, offers an opportunity to investigate potentially ecologically significant shifts in flower and fruit characters. Despite its morphological diversity, however, generic delimitation within the desmoid clade is problematic and the intergeneric relationships of the constituent genera are only poorly understood. Bayesian, maximum likelihood and maximum parsimony analyses of plastid DNA sequence data (matK, psbA-trnH, ndhF, rbcL, trnL-F; ca. 5.4 kb; 52 taxa) were used to clarify phylogenetic relationships within the desmoid clade. The evolution and taxonomic utility of selected fruit and flower characters was investigated with likelihood and parsimony ancestral character reconstructions. The results indicate problems in the current delimitations of Dasymaschalon and Friesodielsia. Friesodielsia as currently circumscribed is polyphyletic, with African Friesodielsia species allied to the African genus Monanthotaxis, and only distantly related to Asian representatives. The majority of Dasymaschalon species form a strongly supported clade, but three species are more closely related to Asian species of Friesodielsia. Ancestral character reconstructions indicate that seed number and monocarp shape are of limited value in generic circumscriptions, and that the three-petalled corolla characteristic of Dasymaschalon evolved independently twice within the desmoid clade. Disruptions to homeotic gene expression or strong selective pressure for a partial enclosure of the mature stamens and carpels by the corolla are hypothesised to underlie the parallel evolution of pollination chambers formed by outer petal homologues subsequent to inner petal loss.</description.abstract>
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Author Affiliations
  1. Duke-NUS Graduate Medical School Singapore
  2. The University of Hong Kong
  3. Wageningen University and Research Centre
  4. National Herbarium of the Netherlands - NHN