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Rapid chromosomal evolution in enigmatic mammal with XX in both sexes, the Alay mole vole Ellobiusalaicus Vorontsov et al., 1969 (Mammalia, Rodentia).
Comparative Cytogenetics ( IF 1 ) Pub Date : 2019-07-06 , DOI: 10.3897/compcytogen.v13i2.34224
Irina Bakloushinskaya 1 , Elena A Lyapunova 1 , Abdusattor S Saidov 2 , Svetlana A Romanenko 3, 4 , Patricia C M O'Brien 5 , Natalia A Serdyukova 3 , Malcolm A Ferguson-Smith 5 , Sergey Matveevsky 6 , Alexey S Bogdanov 1
Affiliation  

Evolutionary history and taxonomic position for cryptic species may be clarified by using molecular and cytogenetic methods. The subterranean rodent, the Alay mole vole Ellobiusalaicus Vorontsov et al., 1969 is one of three sibling species constituting the subgenus Ellobius Fischer, 1814, all of which lost the Y chromosome and obtained isomorphic XX sex chromosomes in both males and females. E.alaicus is evaluated by IUCN as a data deficient species because their distribution, biology, and genetics are almost unknown. We revealed specific karyotypic variability (2n = 52-48) in E.alaicus due to different Robertsonian translocations (Rbs). Two variants of hybrids (2n = 53, different Rbs) with E.tancrei Blasius, 1884 were found at the Northern slopes of the Alay Ridge and in the Naryn district, Kyrgyzstan. We described the sudden change in chromosome numbers from 2n = 50 to 48 and specific karyotype structure for mole voles, which inhabit the entrance to the Alay Valley (Tajikistan), and revealed their affiliation as E.alaicus by cytochrome b and fragments of nuclear XIST and Rspo1 genes sequencing. To date, it is possible to expand the range of E.alaicus from the Alay Valley (South Kyrgyzstan) up to the Ferghana Ridge and the Naryn Basin, Tien Shan at the north-east and to the Pamir-Alay Mountains (Tajikistan) at the west. The closeness of E.tancrei and E.alaicus is supported, whereas specific chromosome and molecular changes, as well as geographic distribution, verified the species status for E.alaicus. The case of Ellobius species accented an unevenness in rates of chromosome and nucleotide changes along with morphological similarity, which is emblematic for cryptic species.

中文翻译:

在AXX雌性田鼠Ellobiusalaicus Vorontsov等人(1969年,哺乳动物,罗丹迪亚)中,XX性别的XX雌性哺乳动物的染色体快速进化。

隐性物种的进化历史和分类学位置可以通过分子和细胞遗传学方法来阐明。地下啮齿动物Alay mole vole Ellobiusalaicus Vorontsov等人(1969)是构成Ellobius Fischer亚属1814的三个兄弟姐妹物种之一,所有这些物种失去了Y染色体并在雄性和雌性中获得了同构的XX性染色体。世界自然保护联盟(IUCN)将大肠埃希菌(E.alaicus)视为数据不足的物种,因为它们的分布,生物学和遗传学几乎未知。由于不同的罗伯逊易位(Rbs),我们揭示了大肠杆菌中的特定核型变异性(2n = 52-48)。1884年与E.tancrei Blasius的杂种的两个变种(2n = 53,不同的Rb)在Alay Ridge的北坡和吉尔吉斯斯坦的Naryn区发现。我们描述了居住在Alay谷(塔吉克斯坦)入口处的田鼠的染色体数目从2n = 50突然变化到48,以及特定的核型结构,并揭示了它们通过细胞色素b和XIST核片段与E.alaicus的联系。和Rspo1基因测序。迄今为止,有可能将大肠埃希菌的范围从阿莱谷(吉尔吉斯斯坦南部)扩展到费尔干纳脊和纳林盆地,东北天山以及帕米尔-阿莱山脉(塔吉克斯坦)。西方。E.tancrei和E.alaicus的亲密关系得到支持,而特定的染色体和分子变化以及地理分布证明了E.alaicus的物种状况。Ellobius物种的案例突出了染色体和核苷酸变化率以及形态相似性的不均匀性,
更新日期:2019-11-01
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