The two Iberian species of pine voles, Microtus (Terricola) duodecimcostatus and M. (T.) lusitanicus of the subfamily Arvicolinae (Cricetidae, Rodentia), were compared after G- and C-banding and chromosomal mapping of ribosomal RNA genes (rDNA), telomeric repeats, and satellite DNA Msat-160. Notwithstanding their close relationship (one sister group in phylogenetic analyses) and sharing of the diploid and fundamental chromosome numbers, the 2 species show notable differences in the sex chromosome morphology, the number and distribution of rDNA sites, constitutive heterochromatin and satDNA patterns. The only telomeric repeats showed normal, all-telomeric, distribution in karyotypes of both species. The data are discussed with regard to interspecific and intrageneric variation of the analyzed characters and the chromosomal evolution in the genus Microtus. Copyright © 2010 S. Karger AG, Basel.
Comparative cytogenetic study of two sister species of iberian ground voles, microtus (Terricola) duodecimcostatus and M. (T.) lusitanicus (Rodentia, Cricetidae) / E., Gornung; Castiglia, Riccardo; M., Rovatsos; J. a., Marchal; R. d., De La Guardia Quiles; A., Sanchez. - In: CYTOGENETIC AND GENOME RESEARCH. - ISSN 1424-8581. - 132:3(2011), pp. 144-150. [10.1159/000321572]
Comparative cytogenetic study of two sister species of iberian ground voles, microtus (Terricola) duodecimcostatus and M. (T.) lusitanicus (Rodentia, Cricetidae)
CASTIGLIA, Riccardo;
2011
Abstract
The two Iberian species of pine voles, Microtus (Terricola) duodecimcostatus and M. (T.) lusitanicus of the subfamily Arvicolinae (Cricetidae, Rodentia), were compared after G- and C-banding and chromosomal mapping of ribosomal RNA genes (rDNA), telomeric repeats, and satellite DNA Msat-160. Notwithstanding their close relationship (one sister group in phylogenetic analyses) and sharing of the diploid and fundamental chromosome numbers, the 2 species show notable differences in the sex chromosome morphology, the number and distribution of rDNA sites, constitutive heterochromatin and satDNA patterns. The only telomeric repeats showed normal, all-telomeric, distribution in karyotypes of both species. The data are discussed with regard to interspecific and intrageneric variation of the analyzed characters and the chromosomal evolution in the genus Microtus. Copyright © 2010 S. Karger AG, Basel.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
