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Plastomes of Nothofagus reflect a shared biogeographic history in Patagonia.
Juri, Gabriela; Ripa, Ramiro R; Premoli, Andrea C.
Afiliação
  • Juri G; Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural, Universidad Nacional de Río Negro - CONICET, Río Negro, Argentina.
  • Ripa RR; Grupo de Genética Ecolgica, Evolutiva y de la Conservación, Instituto de Investigaciones en Biodiversidad y Medioambiente, Universidad Nacional del Comahue - CONICET, Río Negro, Argentina.
  • Premoli AC; Grupo de Genética Ecolgica, Evolutiva y de la Conservación, Instituto de Investigaciones en Biodiversidad y Medioambiente, Universidad Nacional del Comahue - CONICET, Río Negro, Argentina.
J Hered ; 115(5): 588-599, 2024 Aug 20.
Article em En | MEDLINE | ID: mdl-38869982
ABSTRACT
Plastomes are used in phylogenetic reconstructions because of their relatively conserved nature. Nonetheless, some limitations arise, particularly at lower taxonomic levels due to reduced interspecific polymorphisms and frequent hybridization events that result in unsolved phylogenies including polytomies and reticulate evolutionary patterns. Next-generation sequencing technologies allow access to genomic data and strongly supported phylogenies, yet biased topologies may be obtained due to insufficient taxon sampling. We analyze the hypothesis that intraspecific plastome diversity reflects biogeographic history and hybridization cycles among taxa. We generated 12 new plastome sequences covering distinct latitudinal locations of all species of subgenus Nothofagus from North Patagonia. Chloroplast genomes were assembled, annotated, and searched for simple sequence repeats (SSRs). Phylogenetic reconstructions included species and sampled locations. The six Nothofagus species analyzed were of similar size and structure; only Nothofagus obliqua of subgenus Lophozonia, used as an outgroup, presented slight differences in size. We detected a variable number of SSRs in distinct species and locations. Phylogenetic analyses of plastomes confirmed that subgenus Nothofagus organizes into two monophyletic clades each consisting of individuals of different species. We detected a geographic structure within subgenus Nothofagus and found evidence of local chloroplast sharing due to past hybridization, followed by adaptive introgression and ecological divergence. These contributions enrich the comprehension of transversal evolutionary mechanisms such as chloroplast capture and its implications for phylogenetic and phylogenomic analyses.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Filogenia / Filogeografia País/Região como assunto: America do sul / Argentina Idioma: En Revista: J Hered Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Filogenia / Filogeografia País/Região como assunto: America do sul / Argentina Idioma: En Revista: J Hered Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos