Mise en évidence d'une fission centromérique hétérozygote chez un mäle Theropithecus gelada et comparaison chromosomique avec les autres Papioninae

Abstract

SummaryDemonstration of a heterozygote centromeric fission in a male Theropithecus gelada and chromosomal comparison with the other Papioninae.The karyotype of a Theropithecus gelada male specimen is described and compared to that of the other Papioninae (CercopithecidaeJ. Its normal karyotype is composed of 42 chromosomes and is similar to that of Papio, Lophocebus and Macaca. The specimen studied here is heterozygote for a centromeric fission of chromosome 7. The role of chromosomal fissions in the evolution of Cercopithecoids is discussed.

Genomic signatures of high-altitude adaptation and chromosomal polymorphism in geladas

“…2b,c). A single case of an apparently identical variant was previously reported in a captive gelada individual who was heterozygous for this variant (2n=43) but was interpreted as a rare structural anomaly in papionins [28]. We confirmed the homozygous 2n=44 karyotype via G-banding of fibroblasts in our reference individual and 3 additional unrelated individuals from the northernmost gelada population (Fig.…”

The Relationship between the (In-)Stability of NORs and Their Chromosomal Location: The Example of Cercopithecidae and a Short Review of Other Primates

“…The karyotypes of the 6 species studied ( Table 1 ) differ at most by 1 rearrangement and heterochromatin changes [Dutrillaux et al, 1979a[Dutrillaux et al, , b, 1982aMuleris et al, 1983]. The NOR was constantly in an intercalary position in the "short" arm of the metacentric chromosome 9, as described in Macaca mulatta [Henderson et al, 1974].…”