Aniskii V M, Lavrenchenko L A, Varshavskiĭ A A, Milishnikov A N
Genetika. 1997 Sep;33(9):1266-72.
Karyotypes of two species of genus Tachyoryctes from four localities in the Bale Mountains National Park, Ethiopia, were analyzed. T. splendens has 2n = 48, NFa = 65-86. Variations of the autosome arm number are determined by different numbers of autosomes with additional heterochromatin arms (7-17). Karyological analysis indicated that the cytogenetic structures of T. splendens from the localities studied was unique, which might result from formation of the karyotypes optimal for the given habitats. T. macrocephalus has 2n = 50, NFa = 62. A high conservatism of the number and size of C-positive heterochromatin blocks reflects the extreme specialization of T. macrocephalus endemic for the Bale province and occupying a limited ecological niche. Homology of G-banding patterns of several chromosomes and chromosome arms demonstrated that karyotypes of T. splendens and T. macrocephalus were formed from the common ancestral karyotype through different rearrangements in some chromosomes.
对来自埃塞俄比亚巴勒山国家公园四个地点的两种速掘鼠属物种的核型进行了分析。华丽速掘鼠的二倍体数目为2n = 48，NFa为65 - 86。常染色体臂数的变异由具有额外异染色质臂（7 - 17条）的不同常染色体数目决定。核型分析表明，所研究地点的华丽速掘鼠的细胞遗传学结构是独特的，这可能是由适合特定栖息地的核型形成所致。巨头速掘鼠的二倍体数目为2n = 50，NFa为62。C阳性异染色质块的数量和大小高度保守，反映了巨头速掘鼠在巴勒省特有的极端特化以及占据有限的生态位。几条染色体和染色体臂的G带模式的同源性表明，华丽速掘鼠和巨头速掘鼠的核型是由共同的祖先核型通过某些染色体的不同重排形成的。
