Data/hora: 04/06/2024 06:04:03

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 27/05/2020
Data da última atualização: | 10/08/2020
Autoria: | SOUSA, V. A. de; REEVES, P. A.; AGUIAR, A. V. de; STEFENON, V. M.; RICHARDS, C. M.
Afiliação: | VALDERES APARECIDA DE SOUSA, CNPF; Patrick A. Reeves, USDA, National Laboratory for Genetic Resources; ANANDA VIRGINIA DE AGUIAR, CNPF; Valdir Marcos Stefenon, UFSC; Christopher M. Richards, USDA, National Laboratory for Genetic Resources.
Título: | Genetic diversity and biogeographic determinants of population structure in Araucaria angustifolia (Bert.) O. Ktz.
Ano de publicação: | 2020
Fonte/Imprenta: | Conservation Genetics, v. 21, n. 2, p. 217–229, Apr. 2020.
DOI: | https://doi.org/10.1007/s10592-019-01242-9
Idioma: | Inglês
Conteúdo: | Araucaria (Araucaria angustifolia (Bert.) O. Ktze) is a primarily dioecious species threatened with extinction that plays an important social and economic role especially in the southern region of Brazil. The aim of this work is to investigate the diversity and likely determinants of genetic lineages in this species for conservation management. For this, a collection of 30-year-old Araucaria was used. Accessions collected from 12 sites across the species range were analyzed, with ten individuals per site. The SSR genotyping was conducted with 15 loci and the data were analyzed using several complemen-tary approaches. Descriptive statistics among sampling sites were used and diversity was partitioned non-hierarchically to estimate the size and composition of genetic clusters using a Bayesian assignment method. To explore possible biological implications of differences between Niche Models and habitat suitability, a series of statistical procedures were used, and tests were carried out using the software ENM Tools and Maxent. Populations from the southernmost zone showed higher genetic variation and a lower inbreeding coefficient compared to the northernmost zone, which may correlate with their isolation. A positive relation between genetic differentiation and geographic distance was observed. Two genetic groups (southernmost and northernmost zones) were evident. The Niche modelling showed separate ranges for each genetic lineage suggesting that differences in selection pressure may be playing a role in the apparent differentiation and may be adaptive. Finally, an evident correlation was observed between genetic data and habitat suitability. The two distinct groups observed must be considered as independent units for conservation and hybridization in breeding programs.
Palavras-Chave: | Conservação in situ; Species distribution modeling.
Thesagro: | Araucária Angustifólia; Biogeografia; Espécie Nativa; Pinheiro do Paraná.
Thesaurus Nal: | Biogeography; Ex situ conservation.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (57313-1) - UPC - AP - DD -  -  -  - DIS