Bison sex chromosomes

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The chromosome morphology of about 50 species of Bovoidea has now been investigated. Although the diploid number varies from 30 to 60 among these species, the fundamental number NF varies only with but three exceptions from 58 to This indicates an almost exclusive use of the Robertsonian fusion mechanism of karyotype evolution in this group of species which represent 30 different genera. All known cytogenetic information on the Bovoidea has been summarized and a complete bibliography is presented for each species. Karyotypes and data on a number of previously unstudied species are presented. This is a preview of subscription content, access via your institution.
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The somatic karyotypes of American bison and domestic cattle

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The somatic karyotypes of American bison and domestic cattle

Q-band comparisons were made among representative species of the four genera of the tribe Bovini Bos, Bison, Bubalus, Syncerus as well as to selected outgroup taxa representing the remaining two tribes of the subfamily Bovinae nilgai, Boselaphini; eland, Tragelphini , the Bovidae subfamily Caprinae domestic sheep and the family Cervidae sika deer and white-tailed deer. Extensive autosomal arm homologies were noted, but relatively few derivative character states were shared. Focus was then made on variation of the sex chromosomes and the chromosomal distribution of nucleolar organizer regions NORs. Bovine BAC clones were used in molecular cytogenetic analyses to decipher rearrangements of the sex chromosomes, and a pocket gopher 28s ribosomal probe was used to map the chromosomal locations of nucleolar organizing regions NORs. Some of the more noteworthy conclusions drawn from the comparative analysis were that: 1.
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Chromosomal homology of wood bison and plains bison

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