Detecting Mechanisms of Karyotype Evolution in Heterotaxis (Orchidaceae)

• Autor(a) principal: Moraes, Ana Paula [UNIFESP]
• Data de Publicação: 2016
• Outros Autores: Simoes, Andre Olmos, Alayon, Dario Isidro Ojeda, de Barros, Fabio, Forni-Martins, Eliana Regina
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNIFESP
• Texto Completo: http://dx.doi.org/10.1371/journal.pone.0165960; https://repositorio.unifesp.br/handle/11600/56720

The karyotype is shaped by different chromosome rearrangements during species evolution. However, determining which rearrangements are responsible for karyotype changes is a challenging task and the combination of a robust phylogeny with refined karyotype characterization, GS measurements and bioinformatic modelling is necessary. Here, this approach was applied in Heterotaxis to determine what chromosome rearrangements were responsible for the dysploidy variation. We used two datasets (nrDNA and cpDNA, both under MP and BI) to infer the phylogenetic relationships among Heterotaxis species and the closely related genera Nitidobulbon and Ornithidium. Such phylogenies were used as framework to infer how karyotype evolution occurred using statistical methods. The nrDNA recovered Ornithidium, Nitidobulbon and Heterotaxis as monophyletic under both MP and BI