Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/88927
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dc.contributor.authorCastro, Mariana-
dc.contributor.authorCastro, Sílvia-
dc.contributor.authorRodrigues, Albano-
dc.contributor.authorHusband, Brian-
dc.contributor.authorLoureiro, João-
dc.date.accessioned2020-03-11T12:35:42Z-
dc.date.available2020-03-11T12:35:42Z-
dc.date.issued2018-02-14-
dc.identifier.issn2041-2851pt
dc.identifier.urihttp://hdl.handle.net/10316/88927-
dc.description.abstractThe distribution of cytotypes in mixed-ploidy species is crucial for evaluating ecological processes involved in the establishment and evolution of polyploid taxa. Here, we use flow cytometry and chromosome counts to explore cytotype diversity and distributions within a tetraploid-octoploid contact zone. We then use niche modelling and ploidy seed screening to assess the roles of niche differentiation among cytotypes and reproductive interactions, respectively, in promoting cytotype coexistence. Two cytotypes, tetraploids and octoploids, were dominant within the contact zone. They were most often distributed parapatrically or allopatrically, resulting in high geographic isolation. Still, 16.7 % of localities comprised two or more cytotypes, including the intermediate hexaploid cytotype. Tetraploids and octoploids had high environmental niche overlap and associated with similar climatic environments, suggesting they have similar ecological requirements. Given the geographical separation and habitat similarity among cytotypes, mixed-ploidy populations may be transitional and subject to the forces of minority cytotype exclusion which lead to pure-ploidy populations. However, seed ploidy analysis suggests that strong reproductive barriers may enforce assortative mating which favours stable cytotype coexistence. High cytogenetic diversity detected in the field suggests that unreduced gamete formation and hybridization events seem frequent in the studied polyploid complex and might be involved with the recurrent polyploid formation, governing, as well, the gene flow between cytogenetic entities.pt
dc.language.isoengpt
dc.publisherOxford University Presspt
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH/BD/89910/2012/PTpt
dc.relationProjeto exploratório IF/01267/2013pt
dc.relationCENTRO-01-0145-FEDER-000007pt
dc.rightsopenAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt
dc.subjectContact zonept
dc.subjectGladiolus communispt
dc.subjectdistribution patternspt
dc.subjecthexaploidpt
dc.subjectybridizationpt
dc.subjectniche modellingpt
dc.subjectniche overlappingpt
dc.subjectoctoploidpt
dc.subjecttetraploidpt
dc.titleComplex cytogeographical patterns reveal a dynamic tetraploid-octoploid contact zonept
dc.typearticleen
degois.publication.firstPage1pt
degois.publication.lastPage18pt
degois.publication.issue2pt
degois.publication.titleAoB PLANTSpt
dc.relation.publisherversionhttps://academic.oup.com/aobpla/article/10/2/ply012/4857208pt
dc.peerreviewedyespt
dc.identifier.doi10.1093/aobpla/ply012pt
degois.publication.volume10pt
dc.date.embargo2018-02-14*
uc.date.periodoEmbargo0pt
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
crisitem.author.researchunitCEGOT – Centre of Studies on Geography and Spatial Planning-
crisitem.author.orcid0000-0003-0142-4764-
Appears in Collections:I&D CEGOT - Artigos em Revistas Internacionais
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