Caracterização genética de populações naturais de araticunzeiro (Annona crassiflora Mart. - Annonaceae) no Estado de Goiás
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2003-03
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(Genetic characterization of natural populations of “araticunzeiro” (Annona crassiflora Mart. - Annonaceae)
collected in the State of Goiás, Brazil). The level and distribution of the genetic variability in natural populations of “araticunzeiro”
were estimated using a sample of six natural populations, collected in two different regions of the State of Goiás, Brazil. Samples
comprising 30 individuals from each population were genetically evaluated for four allozyme loci: 6-Phosphogluconate
Dehydrogenase (6PGD), Phosphoglucomutase (PGM), Malate Dehydrogenase (MDH) and Leucine Aminopeptidase (LAP).
Two dimeric loci were detected for the 6PGD isozyme system while all the other systems evaluated showed typical monomeric
loci pattern. No polymorphism was detected for the MDH enzymatic system. The estimated average number of alleles per
polymorphic loci was two. The estimated total heterozygosity (averaged across loci) was 0.357, suggesting that a high level of
genetic variability is present in the species along the sampled geographic region. About 19% of the total genetic variation was
found to be due to differences at the population level, suggesting the existence of a high genetic divergence among populations.
Accordingly, the analysis of variance of allelic frequencies for each polymorphic loci showed a strong genetic structure at the
population level. Significant values for the average coefficients of coancestry among individuals within populations and for
total inbreeding were found. The genetic divergences between pairs of populations showed to be partially correlated to the
geographic distances between pair members. Results obtained here suggested that A. crassiflora is preferentially alogamous,
in conformity with other authors findings.
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Annona, Caracterização genética, Cerrado, Isoenzima, Annona, Caracterização genética, Cerrado, Isoenzima
Citação
TELLES, Mariana Pires de Campos et al. Caracterização genética de populações naturais de araticunzeiro (Annona crassiflora Mart. - Annonaceae) no Estado de Goiás. Revista Brasileira de Botânica, São Paulo, v. 26, n.1, p. 123-129, mar. 2003.