Chromosome Polymorphism in the Tree Shrew (Tupaia Glis)

Egozcue, J.; Chiarelli, B.; Sarti-Chiarelli, M.; Hagemenas, F.

doi:10.1159/000155142

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…As in other primates studied (Chiarelli and Egozcue [1967]; Egozcue et al [1968a;1968b]), the X chromosome in diakinesis and metaphase I is usually bent at a submedian location; this suggests that the Y chromosome associates with the short arms of the X N / o * a i Fig. 9.…”

Section: The Meiotic Chromosomesmentioning

confidence: 64%

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Chromosomal Evolution in Marmosets, Tamarins, and Pinchés

Egozcue¹,

Perkins²,

Hagemenas³

1968

IJFP

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Section: The Meiotic Chromosomesmentioning

confidence: 64%

“…5 a and 9). A staining difference can often be seen between the proximal and distal portions of the X (Chiarelli and Egozcue [1967]; Egozcue et al [1968a;1968b]), and sometimes the point where the X bends stains less than the chromosome itself (Fig. 5 a and 9).…”

Section: The Meiotic Chromosomesmentioning

confidence: 99%

Chromosomal Evolution in Marmosets, Tamarins, and Pinchés

Egozcue¹,

Perkins²,

Hagemenas³

1968

IJFP

Self Cite

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“…Early classical non-banding studies showed that diploid numbers for species belonging to the genus Tupaia are relatively high (2n=60, 62, 68) (Chu and Bender 1962;Klinger 1963;Egozcue et al 1968;Arrighi et al 1969;Elliot et al 1969). Even chromosome banding has not contributed much useful information for the comparison of tree shrews with primates and chromosomal homologies have been proposed only within the order Scandentia (Toder et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Defining the ancestral karyotype of all primates by multidirectional chromosome painting between tree shrews, lemurs and humans

et al. 1999

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We used multidirectional chromosome painting with probes derived by bivariate fluorescence-activated flow sorting of chromosomes from human, black lemur (Eulemur macaco macaco) and tree shrew (Tupaia belangeri, order Scandentia) to better define the karyological relationship of tree shrews and primates. An assumed close relationship between tree shrews and primates also assists in the reconstruction of the ancestral primate karyotype taking the tree shrew as an "outgroup" species. The results indicate that T. belangeri has a highly derived karyotype. Tandem fusions or fissions of chromosomal segments seem to be the predominant mechanism in the evolution of this tree shrew karyotype. The 22 human autosomal painting probes delineated 40 different segments, which is in the range found in most mammals analyzed by chromosome painting up to now. There were no reciprocal translocations that would distinguish the karyotype of the tree shrew from an assumed primitive primate karyotype. This karyotype would have included the chromosomal forms 1a, 1b, 2a, 2b, 3/21, 4-11, 12a/22a, 12b/22b, 13, 14/15, 16a, 16b, 17, 18, 19a, 19b, 20 and X and Y and had a diploid chromosome number of 2n=50. Of these forms, chromosomes 1a, 1b, 4, 8, 12a/22a, and 12b/22b may be common derived characters that would link the tree shrew with primates. To define the exact phylogenetic relationships of the tree shrews and the genomic rearrangements that gave rise to the primates and eventually to humans further chromosome painting in Rodentia, Lagomorpha, Dermoptera and Chiroptera is needed, but many of the landmarks of genomic evolution are now known.

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“…2). The chromosome number has been described as 2n = 62 (Egozcue et al, 1968) and 2n = 60 (Chu and Bender, 1962) for this species. Egozcue has described polymorphisms of several chromosome pairs.…”

Section: Description Of Karyotypesmentioning

confidence: 99%

The chromosomal location of rDNA in selected lower primates

Henderson¹,

Warburton

Megraw-Ripley

et al. 1977

Cytogenet Genome Res

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Hybridization in situ was used to identify the chromosomes that carry rDNA in representative lower primates, including the baboons, Papio cynocephalus and Papio hamadryas; the colobus monkey, Colobus polykomos; the tree shrew, Tupaia glis; the lemur, Lemur †ulvis; the saki, Pithecia pithecia; the marmoset, Saguinus nigricollis, and the spider monkey, Ateles geoffroyi. The marker chromosome, common to the Cercopithecines studied to date, carries the rDNA in the baboons. Another marker chromosome carries rDNA in a South American species, the spider monkey. A multichromosomal distribution of rDNA was demonstrated in the tree shrew, lemur, saki, and marmoset. None of the rDNA-containing chromosomes in the prosimians and New World monkeys show homology to the chromosomes that carry rDNA in the Hominids, Pongids, or Old World monkeys.

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Chromosome Polymorphism in the Tree Shrew (Tupaia Glis)

Cited by 12 publications

References 2 publications

Chromosomal Evolution in Marmosets, Tamarins, and Pinchés

Chromosomal Evolution in Marmosets, Tamarins, and Pinchés

Defining the ancestral karyotype of all primates by multidirectional chromosome painting between tree shrews, lemurs and humans

The chromosomal location of rDNA in selected lower primates

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