Cytogenetic Study of Five Species of Cercopithecus

Abstract

The G- and C-banded karyotypes of five species of Cercopithecus are reported. The chromosome numbers are: for C. ascanius katangae 2 n = 66 (XX); for C. petaurista petaurista 2 n = 66 (XY); for C. mona mona 2 n = 68 (XX); for C. pogonias grayi 2 n = 12 (XY) and for C. hamlyni 2 n = 64 (XY). We always found three types of chromosome: metacentric, sub-metacentric and acrocentric. The ‘marker chromosomes’ typical of the Cercopithecidae are of the last type. The karyotype of C. pogonias grayi shows a characteristic pair of acrocentric autosomes which is again found in the hybrid karyotypes.

Cytogenetic Study of Cercopithecus pogonias grayi × Cercopithecus ascanius katangae Hybrids

“…The 32 autosomes of the mother and the 35 of the father, including the P25 chro mosome typical of C. pogonias grayi (see fig. 8, in Dugoujon et al [1981]) are detected.…”

“…The karyotypes of the parents have been reported in a preceding pub lication [Dugoujon et al, 1981], The chromosome number for C. pogonias grayi is 2 n = 72 and for C. ascanius katangae 2 n = 66.…”

Cytogenetic Study of a Cercopithecus pogonias grayi × Cercopithecus mona mon a Hybrid

“…7 in the preceding publication [Dugoujon et al, 1981]) with its added chromatin stained by G and C banding ( fig. 1, 3).…”

“…The parent karyotypes were studied in a preceding article [Dugoujon et al, 1981], The male C. pogonias grayi X C. mona mona hybrid was 2 n = 70. 23 pairs of autosomes were grouped into 16 nonacrocentric and 7 acro centric pairs.…”