Standardized karyotypes for the greater Galagos, Galago crassicaudatus E. Geoffroy, 1812 and G. garnettii (Ogilby, 1838) (Primates: Prosimii)

Masters, Judith; Stanyon, Roscoe; Romagno, Daniela

doi:10.1007/bf00055256

Cited by 12 publications

(14 citation statements)

References 22 publications

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“…Whole peripheral blood cultures were used in the analysis, as outlined elsewhere (Masters et al, 1987). The measurements for the idiogram were derived from 6 classically stained karyotypes, as described before.…”

Section: Methodsmentioning

confidence: 99%

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The chromosomes of Nycticebus coucang (Boddaert, 1785) (Primates: Prosimii)

1987

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The high-quality karyotype of a specimen of Nycticebus coucang is described and illustrated. The X chromosome is found to be indistinguishable from that of the greater galagos, and may represent a synapomorphic trait. The y chromosome is a medium to small submetacentric (3.2% TCL) and constitutes one of the larger Y chromosomes known in primates. N. coucang is found to have multiple NOR-bearing chromosomes in contrast to the single pair found in galagine and catarrhine monkeys. Since a single NOR-bearing pair is often considered ancestral for primates, this new finding may have important implications for the evolution of these cistrons. One of the chromosomal polymorphisms in this specimen is a pericentric inversion, involving a NOR-bearing autosomal pair (no. 6), that alters the position of the active site. Further, homologues 2p differ by a paracentric inversion. These results confirm that lorisiforms are characterized by considerable chromosomal polymorphism.

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Section: Methodsmentioning

confidence: 99%

“…we wished to investigate further the problem of the localization and number of NOR sites in this species; d. N. coucang enables a degree of outgroup comparison for our study of greater galago karyology (Masters et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

The chromosomes of Nycticebus coucang (Boddaert, 1785) (Primates: Prosimii)

1987

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“…Twenty seven of the G. crassicaudatus were wildcaught in southern Africa (see Masters [1986] for details), and one of the two G.c. monteiri was also taken from the wild, although details are not available of the locality.…”

Section: Sampling Methodsmentioning

confidence: 99%

“…Laboratory-bred galagos were classified by their curators on the basis of external morphological features (size, head and ear morphology, and pelage characteristics), according to the descriptions of Hill [1953] andOlson [1979]. Specific identifications were verified by chromosomal analysis [Masters, 1986;Masters et al, 19871.…”

Section: Sampling Methodsmentioning

confidence: 99%

“…Within the greater galagines (classified as a single species, Galago crassicaudatus, by Schwarz [1931] and Hill [1953]), two distinct populations have been identified on the grounds of morphology [Dixson & Van Horn, 1977;Olson, 1979;Masters, 1985Masters, , 1986; Masters & Lubinsky, 19881, karyology [De Boer, 1973;Pasztor & Van Horn, 1977;Masters, 1985, 19861, and reproductive behavior [Buettner-Janusch, 1964;Pasztor & Van Horn, 1976;Dixson & Van Horn, 1977;Eaglen & Simons, 19801. Olson 119791, following Thomas [1917], advised the use of the specific name garnettii for the sister species of G. crassicaudatus, sensu stricto.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of erythrocytic allozymes in two sibling species of greater galago [Galago crassicaudatus E. Geoffroy 1812 and G. garnettii (Ogilby 1838)]

Masters

Dunn

1988

American J Primatol

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This study investigated the use of erythrocyte enzymes as indicators of the presence or absence of gene flow between the sibling species G. crassicaudatus and G. garnettii. Fifty-five animals deriving from 14 different source populations were included in the analyses. In addition to hemoglobin, eight enzyme systems were examined acid phosphatase, adenylate kinase, carbonic anhydrase II, esterase D, glucose-6-phosphate dehydrogenase, 6-phosphogluconate dehydrogenase, peptidase A, and peptidase B. Of these, adenylate kinase, glucose-6-phosphate dehydrogenase, hemoglobin, peptidase A, and peptidase B showed no interspecific or intraspecific variation. Esterase D was polymorphic in certain populations of G. crassicaudatus but not in others or in G. garnettii. Acid phosphatase and 6-phosphogluconate dehydrogenase were polymorphic in G. garnettii but monomorphic in all G. crassicaudatus populations. The taxa showed fixation for different alleles at the carbonic anhydrase I1 locus, indicating a lack of gene exchange betweea the taxa. We suggest that acid phosphatase, 6-phosphogluconate dehydrogenase, and carbonic anhydrase I1 may be used as genetic markers in the identification of these two taxa.

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Chromosome painting reveals that galagos have highly derived karyotypes†

Stanyon

Koehler

Consigliere

2002

American J Phys Anthropol

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The differences in chromosome number between Otolemur crassicaudatus (2n = 62) and Galago moholi (2n = 38) are dramatic. However, the total number of signals given by hybridizing human chromosome paints to galago metaphases is similar: 42 in O. crassicaudatus and 38 G. moholi. Many human chromosome homologs are found fragmented in each species, and numerous translocations have resulted in chromosomal syntenies or hybridization associations which differ from those found in humans. Only 7 human autosomes showed conserved synteny in O. crassicaudatus, and 9 in G. moholi. Both galago species have numerous associations or syntenies not found in humans: O. crassicaudatus has 11, and G. moholi has 21. The phylogenetic line leading to the last common ancestor of the two galago species accumulated 6 synapomorphic fissions and 5 synapomorphic fusions. Since the divergence of the two galago species, 10 Robertsonian translocations have further transformed the G. moholi karyotype, and 2 fissions have been incorporated into the O. crassicaudatus karyotype. Comparison with other primates, tree shrews, and other mammals shows that both galagos have karyotypes which are a mixture of derived and conserved chromosomes, and neither has a karyotype close to that of the proposed ancestor of all primates. Am J Phys Anthropol 117:319-326, 2002. Published 2002 Wiley-Liss, Inc.

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Standardized karyotypes for the greater Galagos, Galago crassicaudatus E. Geoffroy, 1812 and G. garnettii (Ogilby, 1838) (Primates: Prosimii)

Cited by 12 publications

References 22 publications

The chromosomes of Nycticebus coucang (Boddaert, 1785) (Primates: Prosimii)

The chromosomes of Nycticebus coucang (Boddaert, 1785) (Primates: Prosimii)

Distribution of erythrocytic allozymes in two sibling species of greater galago [Galago crassicaudatus E. Geoffroy 1812 and G. garnettii (Ogilby 1838)]

Chromosome painting reveals that galagos have highly derived karyotypes†

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