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vol.20 issue4Calculation of breed direct and maternal genetic fractions and breed specific direct and maternal heterozygosity for crossbreeding dataEvaluation of techniques for C and ASG banding of the mitotic chromosomes of Anastrepha species (Diptera, Tephritidae) author indexsubject indexarticles search
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Brazilian Journal of Genetics

Print version ISSN 0100-8455On-line version ISSN 1678-4502


DANTAS, Sandra Maria Mendes de M.  and  BARROS, Regina Maria de Souza. Cytogenetic study of the genus Saguinus (Callithrichidae, Primates). Braz. J. Genet. [online]. 1997, vol.20, n.4, pp.-. ISSN 0100-8455.

Eight subspecies from the genus Saguinus (S. fuscicollis fuscicollis, S. fuscicollis weddelli, S. bicolor bicolor, S. bicolor martinsi, S. mystax mystax, S. imperator imperator, S. midas midas, and S. midas niger) were studied. Five of them (S. f. fuscicollis, S. f. weddelli, S. b. martinsi, S. m. mystax and S. i. imperator) had their karyotypes described for the first time. Conventional coloration, banding patterns G, C and NOR, and G/C sequential banding tecniques were used. All samples showed the same diploid number (2n = 46). The patterns of the G, C and NOR bands were very similar with little differences in the quantity and constitutive heterochromatin distribution of the autosomes. Constitutive heterochromatin was observed only in telomeric regions of some chromosomes of S. f. fuscicollis and S. f. weddelli. The X chromosome was the same in all subspecies, but chromosome Y differed in size and morphology. XX/XY chimerism was verified in all subspecies

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