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Characterization and distribution of supernumerary chromosomes in 23 colonies of Partamona helleri (Hymenoptera, Apidae, Meliponinae)
Rute Magalhães BritoI; Marco Antônio CostaII; Silvia G. PompoloI
IDepartamento de Biologia Geral, Universidade Federal de Viçosa, 36571-000 Viçosa, MG, Brasil. Send the correspondence to S.G.P.
IIDepartamento de Genética e Evolução, Universidade Federal de São Carlos, Via Washington Luiz 676, km 235, 13565-905 São Carlos, SP, Brasil.
ABSTRACT
Partamona helleri has from zero to three supernumerary chromosomes. Analysis of 23 colonies demonstrated that there are two different types of supernumerary chromosomes, a submetacentric chromosome, which we called B1 type, and a smaller acrocentric chromosome which was designated B2 type. These chromosomes were differently distributed among individuals of the same colony and among individuals of different colonies. In some colonies, we also observed heteromorphism in the second pair of chromosomes, which may be related to the origin of the supernumerary chromosome system of this species.
Keywords: supernumerary chromosomes; Hymenoptera; Meliponinae; Partamona.
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