Divergência entre subpopulações de cagaiteira (Eugenia dysenterica) em resposta a padrões edáficos e distribuição espacial
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Data
2001-11
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Resumo
The domestication and management of native plant species for uses in agricultural systems
is usually constrained by the absence of knowledge about genetic variability, population structure and
evolutionary processes involved in population differentiation in geographic space. A full understanding
of these patterns and processes implies in analyzing multiple characters. In this paper, differentiation
among ten local populations of Eugenia dysenterica DC. from Southeastern region of Goiás state,
Central Brazil, was analyzed. Mantel tests were used to evaluate the relationships between genetic
(eight loci from isozymes) and phenotypic (morphological and demographic characters) patterns of
population differentiation, in relation to spatial distribution and edaphic differences among regions.
The results from Mantel s tests suggested that the main factor acting on genetic differentiation is the
geographic distribution of local populations, in a stochastic model that balances local drift within local
population and short-distance gene flow among them. The phenotypic differentiation, on the other
hand, is better explained by edaphic patterns and also by the geographic distribution. These results
support the idea of neutral (or quasi-neutral) evolutionary processes in isozymic markers and shows
that genetic divergence among local populations is highly structured in geographic space, independently
of variations in edaphic patterns and phenotypic variation.
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Isoenzimas, Fenótipos, Variação genética, Fatores ambientais, Isoenzymes, Phenotypes, Genetic variation, Environmental factors
Citação
TELLES, Mariana Pires Campos et al. Divergência entre populações de cagaiteira (Eugenia dysenterica) em resposta a padrões edáficos e distribuição espacial. Pesquisa Agropecuária Brasileira, Brasília, v. 36, n.11, p. 1387-1394, nov. 2001.