Cytogentic relations among the genera of the subfamily Pitheciinae (Cebidae, Primates)

Universidade Federal do Pará-UFPA, CAPES, CNPq, FADESP, FINEP and C&T/PPG-7Universidade Federal do Pará. Departamento de Genética. Laboratório de Citogenética. Belém, PA, Brazil.Ministério da Saúde. Fundação Nacional de Saúde. Instituto Evandro Chagas. Centro Nacional de Primatas. Ananindeua, PA, Brasil.Ministério da Saúde. Fundação Nacional de Saúde. Instituto Evandro Chagas. Centro Nacional de Primatas. Ananindeua, PA, Brasil.Centro de Primatologia do Rio de Janeiro. Rio de Janeiro RJ, Brazil.Universidade Federal do Pará. Departamento de Genética. Laboratório de Citogenética. Belém, PA, Brazil.Universidade Federal do Pará. Departamento de Genética. Laboratório de Citogenética. Belém, PA, Brazil.Universidade Federal do Pará. Departamento de Genética. Laboratório de Citogenética. Belém, PA, Brazil.Universidade Federal do Pará. Departamento de Genética. Laboratório de Citogenética. Belém, PA, Brazil.A comparative chromosomal analysis was carried out in some specimens of the three genera of the subfamily Pitheciinae (Pithecia, Chiropotes and Cacajao) using a classic cytogenetic technique (G-banding). The three genera present distinct 2n: Pithecia presents 2n=48, Chiropotes 2n=54 and Cacajao 2n=45 in the males and 2n=46 in the females. The difference in 2. found in Cacajao occurs due to a y-autosome translocation present in the male of Cacajao calvus rubicundus. Species and subspecies of the same genera show the same 2n, however the FN are different. G-banding was used to analyze the homeologies among the taxa studied and, by this mean, we observed the presence of speciesspecific chromosomes, chromosomes shared between two or among all the taxa and also chromosomes that are present in all the specimens studied. Data of this karyotypic analysis suggest that Pithecia is the most primitive among the pithecins, followed by Chiropotes, and Cacajao is the most recent one, with very rearranged karyotype