Brief Communication | Published:

Discovery of tetraploidy in a mammal

Naturevolume 401page341 (1999) | Download Citation

Subjects

The red viscacha rat is unaffected by having double the usual number of chromosomes.

Abstract

Polyploidy, or having more than a pair of each type of chromosome, is considered to be unlikely in mammals because it would disrupt the mechanism of dosage compensation that normally inactivates one X chromosome in females1. Also, any imbalance in chromosome number should affect the normal developmental processes and therefore constitute an evolutionary end, as in triploid humans2.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Orr, H. A. Am. Nat. 136, 759–770 (1990).

  2. 2

    Niebuhr, E. Humangenetik 21, 103–125 (1974).

  3. 3

    Gallardo, M. H. in Chromosomes Today Vol 12 (eds Henríques-Gil, N., Parker, J. S & Puertas, M. J.) 347–365 (Chapman & Hall, London, 1997).

  4. 4

    Ojeda, R. A. et al. J. Arid Environ. 41–452 (1999).

  5. 5

    Contreras, L. C., Torres-Mura, J. C. & Spotorno, A. E. Experientia 46, 506–508 (1990).

  6. 6

    Vinogradov, A. E. Cytometry 31, 100–109 (1998).

  7. 7

    Ferrari, M. R., Spirito, S. E., Giuliano, S. M. & Fernández, H. A. Andrologia 30, 85–89 (1998).

  8. 8

    Müller, H. Am. Nat. 59 346–353 (1925).

  9. 9

    Parkhurst, S. M. & Meneely, P. M. Science 264, 924–932 (1994).

  10. 10

    Ohno, S., Kittrell, W. A., Christian, L. C., Stenius, C. & Witts, G. A. Cytogenetics 2, 42–49 (1963).

Download references

Author information

Affiliations

  1. Instituto de Ecología y Evolución, Universidad Austral de Chile, Casilla 567, Valdivia, Chile

    • Milton H. Gallardo
    •  & N. Köhler
  2. Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, Texas, 77843, USA

    • J. W. Bickham
    •  & R. L. Honeycutt
  3. Instituto Argentino de Investigación de Zonas Áridas, Cricyt, GIB Conicet Casilla de Correo 507, 5500, Mendoza, Argentina

    • R. A. Ojeda

Authors

  1. Search for Milton H. Gallardo in:

  2. Search for J. W. Bickham in:

  3. Search for R. L. Honeycutt in:

  4. Search for R. A. Ojeda in:

  5. Search for N. Köhler in:

Corresponding author

Correspondence to Milton H. Gallardo.

About this article

Publication history

Issue Date

DOI

https://doi.org/10.1038/43815

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.