Gornung E, Volleth M, Capanna E, Castiglia R
Department of Animal and Human Biology, University of Rome Sapienza, Rome, Italy.
Cytogenet Genome Res. 2008;121(3-4):249-54. doi: 10.1159/000138892. Epub 2008 Aug 29.
The genus Talpa is the most specious and widespread one in the family Talpidae. The existing karyological records are predominantly basic morphological descriptions. To further investigate the case in point, we performed a comparative cytogenetic study in the genus by comparing G- and C-chromosome banding and NOR patterns of the two European species, T. romana and T. europaea, along with available data regarding several other mole species. Chromosomal hybridization patterns for telomeric repeats and major and 5S ribosomal RNA genes were obtained in T. romana and T. europaea for the first time. The comparison of these patterns revealed differences in distribution of interstitial telomeric repeats and 5S ribosomal RNA genes in the two species with apparently identical karyotypes but different evolutionary histories.
鼹鼠属是鼹科中种类最多、分布最广的属。现有的核型记录主要是基本的形态学描述。为了进一步研究这一情况，我们通过比较两种欧洲鼹鼠物种罗马鼹鼠（Talpa romana）和欧洲鼹鼠（Talpa europaea）的G带和C带染色体以及核仁组织区（NOR）模式，并结合其他几种鼹鼠物种的现有数据，对该属进行了比较细胞遗传学研究。首次在罗马鼹鼠和欧洲鼹鼠中获得了端粒重复序列以及主要和5S核糖体RNA基因的染色体杂交模式。这些模式的比较揭示了两种核型明显相同但进化历史不同的物种在间插端粒重复序列和5S核糖体RNA基因分布上的差异。
