title: Cytogenetic characterization of Partamona cupira (Hymenoptera, Apidae) by fluorochromes.
abstract: Four colonies of the stingless bee Partamona cupira (Hymenoptera: Apidae) were cytogenetically analyzed using conventional staining and the fluorochromes CMA(3) e DAPI. The females have 2n = 34 chromosomes (2K = 32 M¯+2 A¯). Some females, however, presented an additional large B acrocentric chromosome, to a total of 2n = 35. Chromosome B and the chromosomal pairs 2, 9 and 10 showed CMA (3) (+) bands, indicating an excess of CG base-pairs. A clear association was verified between the P. helleri B chromosome SCAR marker and the presence of a B chromosome in P. cupira. The data obtained suggests that B chromosomes in P. helleri and P. cupira share a common origin.
authors.affiliation: Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, MG Brazil.
authors.forename: Jefferson
authors.initials: J
authors.lastname: de Brito Marthe
authors.forename: Silvia das Graças
authors.initials: Sd
authors.lastname: Pompolo
authors.forename: Lucio Antônio
authors.initials: LA
authors.lastname: de Oliveira Campos
authors.forename: Tânia Maria Fernandes
authors.initials: TM
authors.lastname: Salomão
authors.forename: Mara Garcia
authors.initials: MG
authors.lastname: Tavares