Chromosome polymorphism in Ctenomys minutus (Rodentia-Octodontidae)

Tipo: Artigo
Idioma: En
Publicado em: Brazilian Journal of Genetics 19970301
Link Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000100001
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A sample of 101 specimens of Ctenomys minutus was collected along its geographic range.

Eight karyotypes (2n = 42, 45, 46a, 46b, 47, 48, 49 and 50) were found.

The chromosome polymorphisms were due to Robertsonian rearrangements and tandem fusions.

The distribution of polymorphisms indicated three population blocks: northern (2n = 49 and 50), central (2n = 46a, 47, and 48) and southern (2n = 42, 45, and 46b).

These findings suggest that this species is undergoing a speciation process due to geographic isolation.