Abstract
Chromosome material of mitotic bone marrow cells from 59 individuals representing 16 populations of Thomomys talpoides was studied. These populations were found in southern Wyoming, Colorado, northern New Mexico and northern Arizona. A limited amount of intrapopulation variation in form but not number of chromosomes was found. Bight distinct karyotypes were observed. These can be characterized by the following diploid numbers and fundamental numbers of chromosomes: 40(70), 44(70), 56(70), 60(70), 58(76), 48(78), 56(78) and 46(82). Among the six populations with 48 chromosomes some interpopulation variation was noted. In several instances karyotype differences coincided with populations that co-exist without interbreeding.
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References
Bailey, V.: Revision of the pocket gophers of the genus Thomomys. N. Amer. Fauna 39, 1–136 (1915).
Baker, R. J., and J. L. Patton: Karyotypes and karyotypic variations of North American vespertilionid bats. J. Mammalogy 48, 270–286 (1967).
Ford, C. E., J. L. Hamerton, and G. B. Sharman: Chromosome polymorphism in the common shrew. Nature (Lond.) 180, 392–393 (1957).
Hall, E. R., and K. R. Kelson: The mammals of North America, vol.I. New York: Ronald Press Co. 1959.
Hamerton, J. L., H. P. Klinger, D. E. Mutton, and E. M. Long: Somatic chromosomes of the Hominoidea. Cytogenetics 2, 240–263 (1963).
Hsu, T. C., H. H. Reabdon, and G. F. Luquette: Karyotypical studies of nine species of Felidae. Amer. Nat. 97, 225–234 (1963).
Klinger, H. P.: The somatic chromosomes of some primates (Tupaia glis, Nyctieebus couang, Tarsius bancanus, Cercocebus aterrimus, Symphalangus syndactylus). Cytogenetics 2, 140–151 (1963).
Long, C. A.: The mammals of Wyoming. Univ. Kansas Publ.: Museum Natural History 14, 493–758 (1965).
Matthey, R.: The chromosomes of the vertebrates. Advanc. Genet. 4, 159–180 (1951).
—: Cytologie comparée systématique et phylogenie des Microtinae (Rodentia-Muridae). Rev. suisse Zool. 64, 39–71 (1957).
—: Polymorphisme chromosomique intraspecifique chez un Mammifère Leggada minutoides Smith (Rodentia-Muridae). Rev. suisse Zool. 70, 173–190 (1963a).
—: Polymorphisme chromosomique intraspecifique et intraindividuel chez Acomys minous Bates. étude des hybrides A. minous ♂ × A. cahirinus ♀ (Rodentia-Murinae). Le mécanisme des fusions centrique. Chromosoma (Berl.) 14, 468–497 (1963b).
Matthey, R.: Une inversion perioentrique à l'origine d'un polymorphisme chromosomique non-robertsonian dans une population de Mastomys (Rodentia-Murinae). Chromosoma (Berl.) 18, 188–200 (1966).
—, and A. Meylan: Le polymorphisme chromosomique de Sorex araneus araneus L. (Mamm.-Insectivora). Étude de deux portées de 5 et 9 petits. Rev. suisse Zool. 68, 223–227 (1961).
Nadler, C. F.: Chromosomes and systematics of American ground squirrels of the subgenus Spermophilus. J. Mammology 47, 579–596 (1966a).
—: Chromosomes of Spermophilus franklini and taxonomy of the ground squirrel genus Spermophilus. System. Zool. 15, 199–206 (1966b).
—, and M. H. Black: The chromosomes of some North American chipmunks (Sciuridae) belonging to the genera Tamias and Eutamias. Chromosoma (Berl.) 13, 1–15 (1962).
—, and C. E. Hughes: Chromosomes and taxonomy of the ground squirrel subgenus Ictidomys. J. Mammalogy 47, 46–53 (1966).
Patton, J. L.: Chromosome studies of certain pocket mice, genus Perognathus (Rodentia-Heteromyidae). J. Mammalogy 48, 27–37 (1967).
—, and R. E. Dingman: Chromosome studies of pocket gophers, genus Thomomys. I. The specific status of Thomomys umbrinus (Richardson) in Arizona. J. Mammalogy 49, 1–13 (1968).
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Thaeler, C.S. Karyotypes of sixteen populations of the Thomomys talpoides complex of pocket Gophers (Rodentia-Geomyidae). Chromosoma 25, 172–183 (1968). https://doi.org/10.1007/BF00327176
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DOI: https://doi.org/10.1007/BF00327176