Genome size and climate segregation suggest distinct colonization histories of an orchid species from Neotropical high-elevation rocky complexes

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dc.contributor.authorLopes Gomes, Shaiany Sabrina
dc.contributor.authorVidal, Joao D. [UNESP]
dc.contributor.authorNeves, Camila Siqueira
dc.contributor.authorZorzatto, Cristiane
dc.contributor.authorSilva Campacci, Thiago Vinicius
dc.contributor.authorLima, Amanda Kassia
dc.contributor.authorKoehler, Samantha
dc.contributor.authorViccini, Lyderson Facio
dc.contributor.institutionUniv Fed Juiz De Fora
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2018-11-26T16:04:53Z
dc.date.available2018-11-26T16:04:53Z
dc.date.issued2018-07-01
dc.description.abstractKnowledge about the geographical distribution of cytotypes is crucial to understand the role of polyploidy in diversification. High-elevation rocky complexes (HERCs) are heterogeneous formations found in elevated areas of eastern Brazil. They harbour one of the most endemic floras within the Neotropical region. Yet, we lack knowledge concerning the association of environmental variables and plant cytotypes in this region. Here, we investigate whether the frequency of Zygopetalum mackayi orchid cytotypes is related to climate conditions in the HERCs. We describe chromosome counts, genome size estimates and their association with climate variables for 432 individuals from 19 localities. We show, for the first time, a strong association between climate variation and cytotype variation in a species from the HERCs. We confirm two cytotypes for Z. mackayi (2n = 48 and 2n = 96), which are geographically structured, and describe an intermediate cytotype (2n = 72) restricted to a contact zone. We discuss the implications of our results for chromosome evolution in this species and provide hypotheses for the origin and maintenance of cytotypes.en
dc.description.affiliationUniv Fed Juiz De Fora, Inst Ciencias Biol, Dept Biol, Lab Genet, BR-36036900 Juiz De Fora, MG, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias Botucatu, Programa Posgrad Bot, BR-18618689 Botucatu, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, Inst Biol, Dept Biol Vegetal, BR-13083970 Campinas, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias Botucatu, Programa Posgrad Bot, BR-18618689 Botucatu, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.description.sponsorshipInstituto Chico Mendes de Conservacao da Biodiversidade
dc.description.sponsorshipIdFAPESP: 2014/04426-5
dc.description.sponsorshipIdFAPEMIG: APQ-02096-14/PPM 00478-16
dc.description.sponsorshipIdInstituto Chico Mendes de Conservacao da Biodiversidade: 16746
dc.format.extent456-465
dc.identifierhttp://dx.doi.org/10.1093/biolinnean/bly065
dc.identifier.citationBiological Journal Of The Linnean Society. Oxford: Oxford Univ Press, v. 124, n. 3, p. 456-465, 2018.
dc.identifier.doi10.1093/biolinnean/bly065
dc.identifier.issn0024-4066
dc.identifier.urihttp://hdl.handle.net/11449/160536
dc.identifier.wosWOS:000442934800012
dc.language.isoeng
dc.publisherOxford Univ Press
dc.relation.ispartofBiological Journal Of The Linnean Society
dc.relation.ispartofsjr1,175
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectchromosome number
dc.subjectenvironmental predictor
dc.subjecthybrid zone
dc.subjectmixed cytotype population
dc.subjectNeotropics
dc.subjectOrchidaceae
dc.subjectpolyploid
dc.subjectBrazil
dc.titleGenome size and climate segregation suggest distinct colonization histories of an orchid species from Neotropical high-elevation rocky complexesen
dc.typeArtigo
dcterms.licensehttp://www.oxfordjournals.org/access_purchase/self-archiving_policyb.html
dcterms.rightsHolderOxford Univ Press

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