Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Registro completo
Provedor de dados:  Biological Sciences
País:  Brazil
Título:  Genetic variability in a population of Astyanax scabripinnis: recent bottleneck and the possible influence of individuals with B chromosomes
Autores:  Limeira, Daniel Meneguello
Santos, Mateus Henrique
Mateus, Rogério Pincela
Almeida, Mara Cristina de
Artoni, Roberto Ferreira
Data:  2019-11-01
Ano:  2019
Palavras-chave:  Allelic deficiency
Heterozygosity excess
Fixation index
Microsatellites
Supernumerary chromosomes
Resumo:  Access the genetic variability of endangered and isolated populations has become an important conservation tool. Astyanax scabripinnis is a well-known fish model for genetic studies, forming very isolated populations in headwaters. Besides that, this species frequently presents supernumerary chromosomes, which elevates the interest on genetic studies. Genetic diversity of an Astyanax scabripinnis population from the Atlantic Forest (Serra da Mantiqueira region, Brazil) was assessed with microsatellite markers for the first time. Since microsatellite markers are not described for this species, we tested markers described for a related species for transferability to A. scabripinnis. Six polymorphic loci were sufficiently reliable for population genetic analysis. We found that this population passed through a recent bottleneck because of the presence of an excess of heterozygotes, low allelic diversity, heterozygosity excess, and small effective population size. Individuals with and without B chromosomes were previously identified in this population and our study found private alleles in the individuals without B chromosomes. Furthermore, when individuals without B chromosomes were removed from the analysis, the population did not present heterozygosity excess, suggesting that the bottleneck event was driven by individuals with B chromosomes. Our results provide an insight into the value of microsatellite markers as molecular tools and is the first genetic study using molecular data of A. scabripinnis from this area.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47323

10.4025/actascibiolsci.v41i1.47323
Editor:  Universidade Estadual De Maringá
Relação:  http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47323/751375148696
Formato:  application/pdf
Fonte:  Acta Scientiarum. Biological Sciences; Vol 41 (2019): Publicação contínua; e47323

Acta Scientiarum. Biological Sciences; v. 41 (2019): Publicação contínua; e47323

1807-863X

1679-9283
Direitos:  Copyright (c) 2019 Acta Scientiarum. Biological Sciences

https://creativecommons.org/licenses/by/4.0
Fechar
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional