Comparative cytogenetic analysis of the 'Sylvaemus' group of Apodemus [Rodentia, Muridae]: A. sylvaticus from Sicily and A. flavicollis from the central Apennines

• Autorzy: Gornung E. , Cristaldi M. , Castiglia R.
• Języki publikacji: EN

Abstrakty

EN

Chromosome mapping of three common markers, ie major and 5S rRNA genes (rDNA) and telomeric repeats, and conventional chromosome bandings were applied to two sibling species, Apodemus sylvaticus Linnaeus, 1758 and A. flavicollis Melchior, 1834, to further investigate intra- and interspecific karyological differentiation in the genus Apodemus. A slight variation of the rDNA-patterns was detected between the two Apodemus species. In both of them, the major NORs were located on autosome pairs 8, 11, 12 and 22, while the two other rDNA sites detected on chromosomes 7 and 21 were variable in, respectively, A. sylvaticus and A. flavicollis. Several tiny rDNA sites were present on the sex chromosomes in both species, but their incidence was lower in A. flavicollis. Single 5S rDNA chromosomal sites were conserved on chromosome pair 20. No interstitial sites of telomeric repeats were present in either species. In the Sicilian population of A. sylvaticus, the constitutive heterochromatin pattern corresponded to the “sylvaticus-E1” cytotype, while A. flavicollis had a species-specific pattern restricted to centromeres of all chromosomes. The results are discussed in relation to cytogenetic data available for the genus, with emphasis on the Sylvaemus group/subgenus.

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2009
• Tom: 54
• Numer: 3
• Opis fizyczny: p.267-275,fig.,ref.

Twórcy

autor

Gornung E.

• University of Rome "Sapienza", via A. Borelli 50, 00161 Rome, Italy

autor

Cristaldi M.

autor

Castiglia R.

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