Gornung E, Castiglia R, Rovatsos M, Marchal J A, Díaz de la Guardia-Quiles R, Sanchez A
Department of Animal and Human Biology, University of Rome 'Sapienza', Rome, Italy.
Cytogenet Genome Res. 2011;132(3):144-50. doi: 10.1159/000321572. Epub 2010 Oct 30.
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.
对仓鼠科（啮齿目）田鼠亚科的两种伊比利亚松田鼠，即十二肋松田鼠（Microtus (Terricola) duodecimcostatus）和葡萄牙松田鼠（M. (T.) lusitanicus），进行了G带和C带分析以及核糖体RNA基因（rDNA）、端粒重复序列和卫星DNA Msat - 160的染色体定位。尽管它们关系密切（在系统发育分析中为一个姐妹群）且二倍体和基本染色体数相同，但这两个物种在性染色体形态、rDNA位点的数量和分布、组成型异染色质和卫星DNA模式方面存在显著差异。唯一的端粒重复序列在两个物种的核型中均呈现正常的全端粒分布。结合所分析特征的种间和属内变异以及田鼠属的染色体进化对这些数据进行了讨论。
Zotero 插件