Advertisement

Genetica

, Volume 126, Issue 1–2, pp 227–235 | Cite as

Cytogenetics Status of Four Ctenomys Species in the South of Brazil

  • Thales Renato O. de Freitas
Article

Abstract

This report is a review of 20 years of cytogenetics studies in tuco-tucos from the south of Brazil and the implications for the evolution of these species as well as the relation of these data with the geological history of the Coastal Plain of southern Brazil. Two forms of Ctenomys torquatus, 2n = 44 and 46, are separated by a geographic barrier. Ctenomys flamarioni shows a constant karyotype (2n = 48) and presents high variability in FN due to constitutive heterochromatin variation. Ctenomys minutus presents the highest chromosomic variation among the species in the south of Brazil (2n = 42–50) with three chromosomic hybrid zones. Ctenomys lami, like C. minutus, presents a high chromosomic variation due to fusions and fissions of chromosome pairs 1 and 2. Both species present a close evolutionary relationship, including a chromosomic hybrid zone.

Keywords

chromosomes Ctenomyidae Ctenomys Rodentia subterranean rodents 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ab’sáber, A.N. 1990Paleoclimas quaternários e pré-história da América TropicalRevista Brasileira de Biologia50805820Google Scholar
  2. Cook, J.A., E.P. Lessa & E.A. Hadly, 2000. Palentology, phylogenetic patterns and macroevolutionary process in subterranean rodents, pp. 450– Life Underground – The Biology of Subterranean Rodents et alin edited by E.A. Lacey, J.L. Patton & G.N. Cameron. University Chicago Press.Google Scholar
  3. Corrêa, I.C.S., R. Baitelli, J.M. Ketzer & R. Marins, 1992. Translação horizontal e vertical do nível do mar sobre a plataforma continental do Rio Grande do Sul nos últimos 17.500 anos BP. Anais III Congresso Abequa – Belo Horizonte, 225–240.Google Scholar
  4. Fonseca, G.A.B., G. Herrman, Y.L.R. Leite, R.A. Mittermeier, A.B. Rylands & J.L. Patton. 1996. Lista anotada dos mamíferos do Brasil. Occasional Papers in Conservation Biology. n. 4. Conservation International.Google Scholar
  5. Freitas, T.R.O. 1990Estudos citogenéticos e craniométricos em três espécies do gênero CtenomysTese de Doutorado, Curso de Pós-Graduação em Genética UFRGSPorto Alegre235Google Scholar
  6. Freitas, T.R.O. 1994Geographical variation of heterocromatin in Ctenomys flamarioni (Rodentia- Octodontidae) and its cytogenetic relationships with other species of the genusCytogenet. Cell Genet.67193198PubMedGoogle Scholar
  7. Freitas, T.R.O. 1995Geographic distribution and conservation of four species of the genus Ctenomys in southern BrazilStud. Neotrop. Fauna E.305359Google Scholar
  8. Freitas, T.R.O. 1997Chromosome polymorphism in Ctenomys minutus (Rodentia - Octodontidae)Revista Brasielira de Genética2017Google Scholar
  9. Freitas, T.R.O. 2001Tuco-tucos (Rodentia, Octodontidae) in southern Brazil: Ctenomys lami Spec. Nov. separated from C. minutus Nehring 1887Stud. Neotrop. Fauna E.3618Google Scholar
  10. Freitas, T.R.O., Lessa, E.P. 1984Cytogenetics and morphology of Ctenomys torquatus (Rodentia-Octodontidae)J. Mammal.65637642Google Scholar
  11. Freygang, C.C., Marinho, J.R., Freitas, T.R.O. 2004New karyotypes and some considerations about the chromosomal diversification of Ctenomys minutus (Rodentia:Ctenomyidae) on the coastal plain of the Brazilian state of Rio Grande do SulGenetica121125132CrossRefPubMedGoogle Scholar
  12. Garcia, L., Ponsá, M.M., Egozcue, J., Garcia, M. 2000aCytogenetic variation in Ctenomys perrensis (Rodentia, Ocotodontidae)Biol. J. Linn. Soc.71615624CrossRefGoogle Scholar
  13. Garcia, L., Ponsá, M.M., Egozcue, J., Garcia, M. 2000bComparative chromosomal analysis and phylogeny in four Ctenomys species (Rodentia, Ocotodontidae)Biol. J. Linn. Soc.69103120CrossRefGoogle Scholar
  14. Gava, A., Freitas, T.R.O. 2002Characterization of a hybrid zone between chromosomally divergent populations of Ctenomys minutus (Rodentia; Ctenomyidae)J. Mammal.83843851CrossRefGoogle Scholar
  15. Gava, A., Freitas, T.R.O. 2003Inter and intra-specific hybridization in tuco-tucos (Ctenomys) from Brazilian coastal plains (Rodentia: Ctenomyidae)Genetica1191117CrossRefPubMedGoogle Scholar
  16. Gava, A., Freitas, T.R.O. 2004Microsatellite analysis of a hybrid zone between chromosomally divergent populations of Ctenomys minutus from southeastern Brazil (Rodentia: Ctenomyidae)J. Mammal.8512011206CrossRefGoogle Scholar
  17. Gimenez, M.D., Contreras, J.R., Bidau, C.J. 1997Chromosomal variation in Ctenomys pilarensis a recently described species from eastern Paraguay (Rodentia, Ctenomyidae)Mammalia61385398Google Scholar
  18. Kiblisky, P., Brum-Zorrilla, N., Perez, G., Saez, F.A. 1977Variabilidad cromosómica entre diversas poblaciones uruguayas del roedor cavador del género Ctenomys (Rodentia-Octodontidae)Mendeliana28593Google Scholar
  19. Marinho, J.R., Freitas, T.R.O. 2000Intraspecific craniometric variation in a chromosome hybrid zone of Ctenomys minutus (Rodentia, Hystricognathi)Int. J. Mammal. Biol.65226231Google Scholar
  20. Massarini, A., Barros, M.A., Ortells, M.O., Reig, O.A. 1991Chromosomal polymrphism and small karyotypic differentiation in a group of Ctenomys species from Central Argentina (Rodentia: Octodontidae)Genetica83131144CrossRefGoogle Scholar
  21. Massarini, A., Dyzenchauz, F.J., Tiranti, S.I. 1998Geographic variation of chromosomal polymorphism in nine population of Ctenomys azarae, tuco-tucos of the Ctenomys mendocinus (Rodentia-Octodontidae)Hereditas128207211CrossRefGoogle Scholar
  22. Moreira, D.M., Franco, M.H.L.P., Freitas, T.R.O., Weimer, T.A. 1991Biochemical polymorphism and phenetic relationships in rodents of the genus Ctenomys from southern BrazilBiochem. Genet.11601615Google Scholar
  23. Nehring, A. 1887Über eine Ctenomys - Art aus Rio Grande do Sul (Süd Brasilien)Stzumgsb. Ges. Naturf. Fr.44547Google Scholar
  24. Nehring, A. 1900Über dis Schädel von Ctenomys minutus Nhrg., Ct. torquatus Licht und Ct. pundti NhrgStzumgsb. Ges. Naturf.Fr.9201210Google Scholar
  25. Novello, A.F., Lessa, E.P. 1986G-banded homology in two karyomorphs of the Ctenomys pearsoni complex (Rodentia-Octodontidae) of neotropical fossorial rodentsZ. Saugetierkunde51378380Google Scholar
  26. Ortells, M., Contreras, J.R., Reig, O. 1990New Ctenomys karyotype (Rodentia, Octodontidae) from northeastern Argentina and from Paraguay confirm the extreme chromosomal multiformity of the genusGenetica82189202CrossRefGoogle Scholar
  27. Reig, O.A., Kiblisky, P. 1969Chromosome multiformity in the genus Ctenomys (Rodentia:Octodontidae)Chromosoma28211244CrossRefPubMedGoogle Scholar
  28. Reig, O.A., Contreras, J.R., Piantanida, M.J. 1966Contribuición a la elucidación de la sistemática de las entidades del género CtenomysContr. Cient. Fac. Cienc. Exac Nat. Buenos Aires (Zool.)2297352Google Scholar
  29. Reig, O.A. & C. Busch, M.O. Contreras & J.R. Ortells, 1990. An overview of evolution, systematics, population and speciation in Ctenomys, pp. 71–96 Evolution of Subterranean Mammals at the Organismal and Molecular Levelsin edited by E. Nevo O.A. Reig & A.R. Liss. , New York.Google Scholar
  30. Travi, V.H., Freitas, T.R.O. 1984Estudos citogenéticos e craniométricos de Ctenomys flamarioni e Ctenomys australis (Rodentia: Octodontidae)Ciência e Cultura36771Google Scholar
  31. Travi, V.H. 1981Nota prévia sobre nova espécie do gênero Ctenomys Blaiville, 1826 (Rodentia, Ctenomyidae)Iheringia60123124Google Scholar
  32. Villwock, J.A., Tomazelli, L.J., Loss, E.L., Dehnhardt, E.A., Horn Filho, N.O., Bachi, F.A., Dehnhardt, F.A.B.A. 1989Summary of the geology of the coastal province of Rio Grande do SulProceedings of the international symposium on utilization of coastal ecosystems planning, pollution and productivity2471484Google Scholar
  33. Vucetich, M.G., Verzi, D.H., Hartenberger, J.L. 1999Review and analysis of the radiation of the South American Hystricognathi (Mammalia, Rodentia)Académie des Sciences329763769Google Scholar

Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Department of GeneticsFederal University of Rio Grande do SulPorto AlegreBrazil

Personalised recommendations