title: RAPD variation and population genetic structure of Physalaemus cuvieri (Anura: Leptodactylidae) in Central Brazil.
abstract: Studies about the organization of the genetic variability and population structure in natural populations are used either to understand microevolutionary processes or the effects of isolation by human-inducted landscape modifications. In this paper, we analyzed patterns of genetic population structure using 126 RAPD loci scored for 214 individuals of Physalaemus cuvieri, sampled from 18 local populations. Around 97% of these loci were polymorphic. The among-population variation component (Phi(ST)) obtained by AMOVA was equal to 0.101 and theta B obtained using a Bayesian approach for dominant markers was 0.103. Genetic divergence, analyzed by Mantel spatial correlogram, revealed only a short-distance significant correlation between genetic and geographic distances. This is expected if low levels of population differentiation, due to high abundance buffering the effect of stochastic processes, are combined with low spatially restricted gene flow. Although this may be consistent with the current knowledge of species' biology, the spatial distribution of local populations observed in this study also suggest that, at least in part, recent human occupation and habitat fragmentation may also explain part of the interpopulational component of the genetic variation.
authors.affiliation: Departamento de Zootecnia, Universidade Católica de Goiás (UCG), Cx.P. 86, 74605-010, Goiânia, GO, Brasil. tellesmpc@uol.com.br
authors.forename: Mariana Pires de Campos
authors.initials: MP
authors.lastname: Telles
authors.forename: Rogério Pereira
authors.initials: RP
authors.lastname: Bastos
authors.forename: Thannya Nascimento
authors.initials: TN
authors.lastname: Soares
authors.forename: Lucileide Vilela
authors.initials: LV
authors.lastname: Resende
authors.forename: José Alexandre Felizola
authors.initials: JA
authors.lastname: Diniz-Filho
mesh_terms: D000818:Animals; D001001:Anura / Q000235:genetics*; D001499:Bayes Theorem; D001938:Brazil; D004247:DNA / Q000235:genetics; D017753:Ecosystem; D014644:Genetic Variation; D005828:Genetics, Population; D019105:Random Amplified Polymorphic DNA Technique
chemical_list: D004247:DNA