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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Trava, Bruna Memari [1] ; Mateus, Rogerio Pincela [2] ; de Barros Machado, Luciana Paes [2] ; Madi-Ravazzi, Lilian [1]
Total Authors: 4
[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
Total Affiliations: 2
Document type: Journal article
Source: ZOOLOGICAL STUDIES; v. 60, AUG 17 2021.
Web of Science Citations: 0

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)

FAPESP's process: 15/17579-7 - Illustrated manual for research with Drosophila: volume I
Grantee:Gabriel Accioly Tripode
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 17/05344-0 - Illustrated guide for research in Drosophila: containing key dichotomous to identification updated
Grantee:Jéssica Fernanda Paixão
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 14/14059-0 - Biodiversity of Drosophilidae in areas of the Atlantic Forest and population structure of the Drosophila sturtevanti with emphasis on application in conservation programs
Grantee:Lilian Madi Ravazzi
Support type: Regular Research Grants