The unusual karyotype of the lesser kudu, &lt;i&gt;Tragelaphus imberbi&lt;/i&gt;&lt;i&gt;s&lt;/i&gt;

Benirschke, Kurt; Rüedi, D.; Müller, Hj.; Kumamoto, Arlene T.; Wagner, Klaus; Downes, H.S.

doi:10.1159/000131429

Cited by 8 publications

(1 citation statement)

References 3 publications

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“…This is actually a neo-X believed to have been formed by centric fusion between the original X and the homolog of cow chromosome 13. Benirschke et al (1980) identified a similar and potentially homologous heterochromatic region on the acrocentric presumed neo-Y [likely a t(13;Y)] of the lesser kudu, but we have not yet analyzed this compound chromosome. Of further interest is the Y chromosome of nilgai.…”

Section: Karyotypic Evolution and The Chromosomal Distribution Of Satmentioning

confidence: 99%

Evolutionary histories of highly repeated DNA families among the artiodactyla (mammalia)

1996

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Six highly repeated DNA families were analyzed using Southern blotting and fluorescence in situ hybridization in a comparative study of 46 species of artiodactyls belonging to seven of the eight extant taxonomic families. Two of the repeats, the dispersed bovine-Pst family and the localized 1.715 component, were found to have the broadest taxonomic distributions, being present in all pecoran ruminants (Giraffidae, Cervidae, Antilocapridae, and Bovidae), indicating that these repeats may be 25-40 million years old. Different 1.715 restriction patterns were observed in different taxonomic families, indicating that independent concerted evolution events have homogenized different motifs in different lineages. The other four satellite arrays were restricted to the Bovini and sometimes to the related Boselaphini and Tragelaphini. Results reveal that among the two compound satellites studied, the two components of the 1.711a originated simultaneously, whereas the two components of the 1.711b originated at two different historical times, perhaps as many as 15 million years apart. Systematic conclusions support the monophyly of the infraorder Pecora, the monophyly of the subfamily Bovinae (containing the Boselaphini, Bovini, and Tragelaphini), an inability to resolve any interrelationships among the other tribes of bovids, paraphyly of the genus Bos with respect to Bison, and a lack of molecular variation among two morphologically and ecologically distinct subspecies of African buffaloes (Syncerus caffer cafer and S. c. nanus). Cytogenetically, a reduction in diploid chromosome numbers through centric fusion in derived karyotypes is accompanied by a loss of centromeric satellite DNA. The nilgai karyotype contains an apparent dicentric chromosome as evidenced by the sites of 1.715 hybridization. Telomeric sequences have been translocated to the centromeres without concomitant chromosomal rearrangement in Thompson's gazelle.

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Section: Karyotypic Evolution and The Chromosomal Distribution Of Satmentioning

confidence: 99%

Evolutionary histories of highly repeated DNA families among the artiodactyla (mammalia)

1996

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Verification of the structure of the complex sex chromosome system in Lagorchestes conspicillatus Gould (Marsupialia: Mammalia)

Sharp

1981

Chromosoma

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The complex sex chromosome system of Lagorchestes conspicillatus has been reinvestigated using G-banding, Hoechst 33258 sensitivity, and Ag staining. These investigations demonstrate that, as proposed, three exchanges have been involved in the evolution of this system. An autosome was translocated to the original X and the homologue of that autosome was translocated to the original Y. An additional autosome has been translocated to the Y. There is no sex vesicle at meiosis in the male, and no association between the original X and Y elements of the compound chromosomes. The inadequacies of the present terminology for complex sex chromosomes are considered and an alternative system suggested.

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Glischropus tylopus, the first known old-world bat with an X-autosome translocation

Volleth

Yong

1987

Experientia

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The unusual karyotype of the lesser kudu, <i>Tragelaphus imberbi</i><i>s</i>

Cited by 8 publications

References 3 publications

Evolutionary histories of highly repeated DNA families among the artiodactyla (mammalia)

Evolutionary histories of highly repeated DNA families among the artiodactyla (mammalia)

Verification of the structure of the complex sex chromosome system in Lagorchestes conspicillatus Gould (Marsupialia: Mammalia)

Glischropus tylopus, the first known old-world bat with an X-autosome translocation

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