The Karyotype of Cacajao melanocephalus (Platyrrhini, Primates)

Koiffmann, Célia Priszkulnik; Saldanha, P. H.

doi:10.1159/000156015

Cited by 21 publications

(10 citation statements)

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“…Cytogenetic studies have shown that New World primates are karyologically diverse, and some species are highly derived with respect to the chromosome complement of humans or a presumed platyrrhine ancestor (Chu and Bender 1962;Koiffmann and Saldanha 1981;Consigliere et al 1996Consigliere et al , 1998Stanyon et al 2000;Bonvicino et al 2003). The genus Callicebus is one of the best examples of this diversity because diploid numbers among species range from 2n=50 (Rodrigues et al 2001) to 2n=16 (Bonvicino et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Chromosome painting in Callicebus lugens , the species with the lowest diploid number (2 n =16) known in primates

et al. 2003

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Cytogenetic studies have shown that New World primates are karyologically diverse and highly derived. The genus Callicebus is the best example of this karyological diversity, with diploid numbers ranging from 2n=50 to 2n=16. We report on Callicebus lugens, which has the lowest diploid number (2n=16) yet found in the primate order and represents a striking example of extreme karyotypic shuffling. To better understand the genomic rearrangements that have resulted in this extremely low diploid number, we mapped chromosome homologies between C. lugens and humans by in situ hybridization. The total number of hybridization signals was 42, excluding the Y chromosome, with a total of 34 syntenic associations not found in humans. This species has one of the most derived karyotypes among the Platyrrhini. Fusion has been the predominant mode of karyological evolution, although fissions and inversions have also transformed the C. lugens karyotype. Remarkably in such a highly rearranged karyotype, the synteny of 11 human chromosomes (4, 5, 9, 12, 13, 14, 17, 18, 20, 21, and X) was maintained intact, even if most of these human-homologous gene clusters were translocated. Other human syntenies, such as homologues to human chromosomes 10 and 16, were highly fragmented. Comparisons of the C. lugens-human homology map with those of other New World primates have not yet helped establish a phylogenic arrangement between congeneric species or link Callicebus with any other genus.

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Section: Introductionmentioning

confidence: 99%

Chromosome painting in Callicebus lugens , the species with the lowest diploid number (2 n =16) known in primates

et al. 2003

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“…In most of these animals however, the aberration was a Y chromosome translocated to an autosome. Translocation involving Y chromosomes has been found in Alouatta palliata [Ma et al, 1975], Alouatta fusca clamitans [Koiffmann and Saldanha, 1974], Cacajao melanocephalus [Koiffmann and Saldanha, 1981], Callimico goeldii [Hsu and Hampton, 1970] and Aotus trivirgatus [Ma et al, 1976a]. In the latter species, extensive karyotypic polymorphism has been described [Brumback, 1974], In cytogenetic studies of A. trivirga tus from 4 different South American countries, Ma et al [1976b] identified 7 distinctive karyotypes among 330 individuals belonging to four distin guishable pelage phenotypes.…”

Section: Discussionmentioning

confidence: 99%

Karyotype of Saguinus labiatus labiatus (Red-Bellied Marmosets)

Marczynska¹,

Peterson²,

Ogden³

et al. 1983

IJFP

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The karyotype of Saguinus labiatus labiatus was determined by the Giemsa-banding technique on leukocytes cultured from 10 marmosets. The diploid chromosome number (2n = 46) was the same and the chromosome complement similar to other marmosets of genus Saguinus. Small karyotypic differences were found between S. l. labiatus and white-lipped marmosets (Saguinus fuscicollis) in the size of the X chromosome and in the banding pattern of one pair of metacentric chromosomes. A karyotypic variant was detected in 1 S. l. labiatus, characterized by a diploid chromosome number of 45 with balanced autosomal translocation involving two pairs of acrocentric chromosomes (T 16/19).

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“…In C. melanocephalus 2n = 45 for males and 46 for females, with 12 acrocentric pairs, 9 biarmed pairs, 1 heteromorphic pair, a submetacentric X chromosome, and a Y chromosome that has translocated to an acrocentric autosome (Koiffman and Saldanha 1981). Robertsonian translocations have occurred during evolution; C. calvus and C. melanocephalus have acquired 1 translocation since their divergence (Veigas-Pequignot et al 1985).…”

Section: --Cacajao Melanocephalusmentioning

confidence: 99%

Cacajao melanocephalus

2005

Mammalian Species

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The Karyotype of Cacajao melanocephalus (Platyrrhini, Primates)

Cited by 21 publications

References 5 publications

Chromosome painting in Callicebus lugens , the species with the lowest diploid number (2 n =16) known in primates

Chromosome painting in Callicebus lugens , the species with the lowest diploid number (2 n =16) known in primates

Karyotype of Saguinus labiatus labiatus (Red-Bellied Marmosets)

Cacajao melanocephalus

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