KARYOLOGY OFAEPEOMYSANDTHOMASOMYS(RODENTIA: MURIDAE) FROM THE VENEZUELAN ANDES
| Autor: | Pascual J. Soriano, Marisol Aguilera, G José Ochoa, Antonio Perez-Zapata |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
medicine.medical_specialty
education.field_of_study Ecology biology Heterochromatin Population Cytogenetics Zoology Karyotype Aepeomys biology.organism_classification Genetics medicine Constitutive heterochromatin Animal Science and Zoology education Ecology Evolution Behavior and Systematics X chromosome Nature and Landscape Conservation Thomasomys |
| Zdroj: | Journal of Mammalogy. 81:52-58 |
| ISSN: | 1545-1542 0022-2372 |
| DOI: | 10.1644/1545-1542(2000)081<0052:koaatr>2.0.co;2 |
| Popis: | We provide new data on the karyologic patterns of the Andean rodents Aepeomys and Thomasomys, including the 1st karyotypic description of A. lugens and T. vestitus. Two differentiated chromosomal formulae were found for Aepeomys in Venezuela; they are a diploid chromosome number (2n) 5 28, fundamental number (FN) 5 48 karyotype corresponding to A. lugens and a2 n5 44; FN 5 46 karyotype for an unnamed population (Aepeomys sp.). According to the structure of these 2 karyotypes and the distribution of constitutive heterochromatin (scarce and restricted to a few chromosomes in A. lugens versus abundant and scattered among chromosomes in Aepeomys sp.), we suggest that Aepeomys sp. is a more primitive form than A. lugens. T. laniger and T. vestitus showed karyotypes of 2n 5 42, FN 5 40 and 2n 5 44, FN 5 42, respectively; the latter has an additional pair of small-sized metacentric chromosomes and an acrocentric X chromosome (metacentric in T. laniger). Our results suggest that Aepeomys and Thomasomysare closely related taxa in terms of their karyologic patterns. |
| Databáze: | OpenAIRE |
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