Section 8
Chapter 7,376

Genetics of the genus acrocomia palmae iii. microgeographical genetic variability in isozymes frequencies

Lopes, C.R.; Dos-Reis, S.F.; Ferreira, M.A.; Moretzsohn, M.C.

Journal of Genetics and Breeding 46(1): 9-13


Accession: 007375918

In this study we provide an estimate of genetic varibility in ten samples of Acrocomia aculeata (macauba palm) collected across Belem - Brasilia highway (BR-153), Brazil, in the North of the State of Goias, between km 165 and km 231. Twelve presumptive loci were analyzed using electrophoretic techniques and the allelic frequencies were calculated for each sample through the isozyme phenotypes. The observed heterozygosity varied from 0.042 to 0.667 with a mean of 0.182, while the calculated heterozygosity ranged from 0.087 to 0.499 with a mean of 0.375. Nei's genetic distance ranged between 0.020 and 0.447, with a mean of 0.125. These results show that the values of calculated heterozygosity are always higher than the values of observed heterozygosity, suggesting a deviation from Hardy-Weinberg expectations. They also indicate that there is a free change of genes among these subpopulations which is common in the studied populations of A. aculeata. The genetic variability is similar to that which is found in populations studies of one species. The genetic variability in A. aculeata does not seem to be structure spaciously or correlated with the increase of the geographical distance.

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