Issue |
Apidologie
Volume 21, Number 4, 1990
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Page(s) | 271 - 280 | |
DOI | https://doi.org/10.1051/apido:19900401 |
DOI: 10.1051/apido:19900401
Genetic differentiation estimated by isozymic analysis of Africanized honeybee populations from Brazil and from Central America
M.A. Del Lamaa, J.A. Lobob, A.E.E. Soaresb and S.N. Del Lamaaa Departamento de Ciencias da Saude, Universidade Federal de São Carlos, Rodovia Washington Luiz, Km 235, 13560 São Carlos, SP, Brazil
b Departamento de Genetica, Faculdade de Medicina de Ribeirão Preto, Universidade de Sâo Paulo, 14049, Ribeirão Preto, SP, Brazil
Abstract - Adult Apis mellifera workers were electrophoretically examined in at least 7 enzyme loci. Five loci were found to exhibit polymorphism (Est-1, Est-3, PGM-1, HK-1 and MDH-1) in the Africanized bee populations from Brazil and from Central America (Costa Rica and Honduras). Genetic variation was not observed for Est-1 and HK-1 in the bee samples from Italy and Germany, and for PGM-1 in the Italian bee sample. Genotypic frequencies at the MDH-1 and HK-1 loci in the Honduras sample are in disagreement with that expected for Hardy-Weinberg equilibrium, suggesting an incipient process of mixture between pre-existing European bees in this country and the Africanized swarms that came from South America. Racial admixture estimates based on MDH-1 data indicate that the Africanization level of Central American honeybees is less than for bees from Southeast and Northern Brazil.
Key words: Africanized honeybee / genetic variation / genetic differentiation / gene frequency / isozyme