A Comparison of the Karyotypes of Six Species of the Genus Macaca and a Species of the Genus Cercocebus

Abstract

Karyotypes from 72-hour whole blood cultures were compared for six species of macaques (Macaca arctoides, M. fascicularis, M. mulatta, M. nemestrina, M. nigra, and M. radiata) and one species of mangabey (Cercocebus atys). G-bands, sequential C-bands, and late replication patterns were studied. Results showed a variation in a single chromosome pair which differentiated C. atys from the macaques. Heteromorphic variation in silver stained nucleolar organizing regions was seen between and within individuals. This data supports previous work showing the highly conserved nature of the chromosomes of the subfamily Cercopithecus.

A Comparison of the Karyotype of Five Species in Genus Macaca (Primate, Cercopithecidae) in Thailand by Using Conventional Staining, G-banding and High-Resolution Technique

“…The genetic marker of the macaque in genus Macaca in Thailand is NOR on the short arm of chromosome 13. This result agrees with the result from Brown et al (1986) that reported M. arctoides, M. fascicularis, M. mulatta, M. nemestrina, Celebes crested, Bonnet and Mangabey have NOR on the short arm of chromosome 9. The different position of NOR occurred because of the karyotype and the method used to detect the length of the chromosome.…”

“…In this study, the autosomes were different from Brown et al (1986) who reported that M. arctoides has 14 metacentric and 26 submetacentric chromosomes whereas the chromosomes of M. fascicularis, M. mulatta and M. nemestrina were similar, with 18 metacentric and 22 submetacentric. M. fascicularis (Hirai et al 1991) and M. mulatta (Napier andNapier 1976, Small andStanyon 1985) are also reported as having 18 metacentric and 22 submetacentric chromosomes.…”

“…From this study it was found that the chromosome number and the fundamental number of 5 species of Macaca in Thailand are consistent with Brown et al (1986). The Macaca, namely M. arctoides, M. fascicularis, M. mulatta, M. nemestrina, Celebes crested, Bonnet and Mangabey in genus Cercocebus have the same chromosome number, 2nϭ42.…”

“…The X chromosome has 2 types, metacentric and submetacentric. According to a previous study it was found that M. arctoides, M. fascicularis, M. mulatta, M. nemestrina, Celebes crested and Bonnet have a large shift in sex chromosome (Brown et al 1986). The Y chromosome is the smallest and has different sizes.…”

“…The smallest (Brown et al 1986). The X chromosome of M. fascicularis is medium metacentric and the Y chromosome is the smallest telocentric reported (Hirai et al 1991).…”