Genetic structure based on nuclear and chloroplast microsatellite loci of Solanum lycocarpum A. St. Hil. (Solanaceae) in Central Brazil
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Data
2011
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Resumo
Solanum lycocarpum (Solanaceae) is a woody species found in the Brazilian Cerrado. The flowers are pollinated by Xylocopa spp bees, and seeds are dispersed by mammals with distinct home range sizes. As a consequence, relative contributions of pollen and seeds to overall gene flow can vary according to different spatial scales. We studied the genetic structure of four natural populations of S. lycocarpum separated by 19 to 128 km, including individuals located along dirt roads that interlink three of the populations. A total of 294 individuals were genotyped with five nuclear and six chloroplast microsatellite markers. Significant spatial genetic structure was found in the total set of individuals; the Sp statistic was 0.0086. Population differentiation based on the six chloroplast microsatellite markers (θpC = 0.042) was small and similar to that based on the five nuclear microsatellite markers (θp = 0.054). For this set of populations, pollen and
seed flow did not differ significantly from one another (pollen-to-seed flow
ratio = 1.22). Capability for long distance seed dispersion and colonization
of anthropogenic sites contributes to the ability of S. lycocarpum to maintain
genetic diversity. Seed dispersion along dirt roads may be critical in preserving
S. lycocarpum genetic diversity in fragmented landscapes.
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cpDNA inheritance, Spatial genetic structure, Gene flow, Pollen flow, Seed dispersion
Citação
MARTINS, K.; Chaves, L. J.; VENCOVSKY, R.; KAGEYAMA, P. Y. Genetic structure based on nuclear and chloroplast microsatellite loci of Solanum lycocarpum A. St. Hil. (Solanaceae) in Central Brazil. Genetics and Molecular Research, Ribeirão Preto, v. 10, n. 2, p. 665-677, 2011.