Data/hora: 03/06/2024 08:09:16

Biblioteca(s): | Epagri-Sede.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Internacional - A
Data corrente: | 21/03/2019
Data da última atualização: | 21/03/2019
Autoria: | STEFENON, V. M.; KLABUNDE, G. H. F.; LEMOS, R. P. M.; ROGALSKI, M.; NODARI, R. O.
Título: | Phylogeography of plastid DNA sequences suggests post-glacial southward demographic expansion and the existence of several glacial refugia for Araucaria angustifolia.
Ano de publicação: | 2019
Fonte/Imprenta: | Scientific Reports, New York, v. 9, p. 1-13, 2019.
Idioma: | Inglês

Conteúdo:

Despite the high diversity of the southern south American environments, the patterns and processes
driving both their species diversity and demographic history are still poorly known and are a
challenging task. In this study, we evaluate plastid DNA sequences of the conifer species Araucaria
angustifolia aiming to (i) assess the species genetic structure within its main range of occurrence, (ii)
infer its population demographic history, looking for evidence of southward expansion, (iii) search for
evidence of glacial refugia within the species distribution area and (iv) discuss some conservation and
management strategies for this species. Twenty haplotypes were identifed, revealing the presence of
three distinct genetic groups across the geographic range of the species and structuring the populations
into Northern, Central and southern groups. our results suggest the occurrence of post-glacial
expansion of A. angustifolia towards the south, as well as the existence of at least three refugia within
the species occurrence area. testing the occurrence of historical demographic expansion, we suggest
that genetic groups experienced fuctuations in efective size, associated to a structured distribution
of populations. The identifcation of three genetic groups in this study corroborates the proposition of
using the geographic distribution of A. angustifolia for selecting in situ conservation areas, for planning
seed collection for ex situ conservation, as well as for the delineation of seed zones.

Palavras-Chave: | Araucaria; DNA; evolution; Molecular ecology.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_42109.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (103352-1) - UPC - AP - DD -  -  -  - DIS