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首页> 外文期刊>Zoological Science >Chromosome Differentiation of Four 2n=50 Chromosomal Forms of Turkish Mole Rat, Nannospalax nehringi
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Chromosome Differentiation of Four 2n=50 Chromosomal Forms of Turkish Mole Rat, Nannospalax nehringi

机译：土耳其Mo鼠Nannospalax nehringi的4种2n = 50染色体形​​式的染色体分化

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摘要

Nannospalax is a genus of blind rodents adapted to living in underground. The species have numerous chromosomal forms in Turkey, and their taxonomic position is still unknown. In this study, 15 mole rats of four different 2n = 50 forms were used; C- and G- banding processes were applied; and a comparison was made accordingly. Karyological results showed that the 2n = 50S form is a new form for Turkish blind mole rats. 2n = 50S form is determined from Andirin (Kahramanmaras) and has NF = 70. The 2n = 50W form, on the other hand, differs from the others with NF = 74 form. C-banding results showed that heterochromatin blocks of all 2n = 50 are different, while only the 2n = 50W form has telomeric heterochromatin blocks. G-banding results, however, displayed homologies and differences among the chromosomal forms. After comparison, we determined that Robertsonian fusion is an efficient force on chromosomal evolution in blind mole rats in Turkey, and that telomeric heterochromatin is a distinctive character for the 2n = 50W form. We suggest that the chromosomal changing mechanism should be independent from climatic peculiarities. These results support the theory that ancestral karyotype should have the largest distribution in a chromosomally variable species.
机译：Nannospalax是适合生活在地下的盲鼠属。在土耳其，该物种具有多种染色体形式，其分类位置仍然未知。在这项研究中，使用了15种4种不同的2n = 50形式的mole鼠。应用了C波段和G波段工艺;并据此进行了比较。核力学结果表明2n = 50S形式是土耳其盲blind鼠的新形式。 2n = 50S形式由Andirin（Kahramanmaras）确定，其NF =70。另一方面，2n = 50W形式与其他形式的NF = 74形式不同。 C谱带结果表明，所有2n = 50的异染色质嵌段均不同，而只有2n = 50W的形式具有端粒异染色质嵌段。但是，G谱带结果显示出染色体形式之间的同源性和差异。经过比较，我们确定罗伯逊融合是土耳其盲mole鼠染色体进化的有效力量，端粒异染色质是2n = 50W形式的独特特征。我们建议染色体改变机制应独立于气候特点。这些结果支持了在染色体可变的物种中祖先核型应该具有最大分布的理论。

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