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Moderate Population Structure in Drosophila sturtevanti from the South American Atlantic Forest Biome

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Autor(es):
Trava, Bruna Memari [1] ; Mateus, Rogerio Pincela [2] ; de Barros Machado, Luciana Paes [2] ; Madi-Ravazzi, Lilian [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista Julio de Mesquite Filho UN, Inst Biociencias Letras & Ciencias Exatas, Cristovao Colombo St 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
[2] Univ Estadual Ctr Oeste UNICENTRO, Campus CEDETEG, Elio Antonio Vecchia Alley 838, BR-85040167 Guarapuava, PR - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: ZOOLOGICAL STUDIES; v. 60, AUG 17 2021.
Citações Web of Science: 0
Resumo

Drosophila sturtevanti is a widely distributed Neotropical species. In South America, it is abundant and adapted to different phytophysiognomies of the Atlantic Forest biome. Reproductive, chromosomal and enzymatic studies have indicated the existence of a differentiation among D. sturtevanti populations. In this work, the level of genetic diversity and the population genetic structure were analyzed using four population groupings. One hundred and twenty-six D. sturtevanti males collected from nine forest fragments were analyzed for 11 species-specific microsatellite loci. A total of 109 alleles, ranging from 2 to 16 alleles per locus, were detected. The highest mean observed heterozygosity H-O was estimated in samples from the largest collection areas, and the lowest H-O was from a population where fire events are common. A low molecular variation, around 3% among populations and negative among groups, an absence of genetic and geographic correlations and a moderate genetic differentiation F-ST = 0.0663 indicated that D. sturtevanti is not strongly structured. Besides no overall genetic and geographic distance correlation, the pair of closest geographically populations Matao and Nova Granada showed the lower differentiation through F-ST, DC and a Neighbor Joining tree. Ribeirao da Ilha RDI, an isolated insular population, was the most differentiated according to F-ST, DC and a cluster-based Bayesian analysis. The isolation of RDI that resulted in significant divergence could be ancient, because of sea level regressions/ transgressions, or more recently via founder effect/genetic drift by anthropic action carrying D. sturtevanti hosts from continent to island. This work is important for understanding the genetic variability distribution of a Neotropical forest-dwelling Drosophila species using for the first time, a wide population distribution approach. (AU)

Processo FAPESP: 15/17579-7 - Manual básico ilustrado de pesquisa com Drosophila: volume I
Beneficiário:Gabriel Accioly Tripode
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 14/14059-0 - Biodiversidade de drosofilídeos em domínios da Mata Atlântica e estrutura populacional de Drosophila sturtevanti com ênfase na aplicação em programas de conservação
Beneficiário:Lilian Madi Ravazzi
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 17/05344-0 - Guia ilustrado de pesquisa em Drosophila: contendo chave de identificação dicotômica atualizada
Beneficiário:Jéssica Fernanda Paixão
Linha de fomento: Bolsas no Brasil - Iniciação Científica