L. A. Lavrenchenko, A. R. Gromov, A. A. Martynov, D. S. Kostin, V. A. Komarova, D. M. Krivonogov, E. V. Cherepanova
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引用次数: 0
摘要
摘要 在下诺夫哥罗德州西北部、弗拉基米尔州东部和下诺夫哥罗德州西南部、利佩茨克州南部和沃罗涅日州西北部的四个地段研究了普通田鼠Microtus arvalis s.str.和M. obscurus同种杂交区中几个遗传标记的引入模式。对三个分子遗传标记(cytb、tp53、SMCY11)和核型的支系变异性分析表明,"弗拉基米尔-下诺夫哥罗德"、"下诺夫哥罗德 "和 "沃罗涅日 "切片之间在结构上具有相似性。细胞克隆的宽度最大;SMCY11克隆的宽度最小;tp53克隆和染色体克隆在这一参数上处于中间位置。此外,在这些横断面上,cytb cline 的中心从其他三个 cline 的中心向东南偏移(进入 M. obscurus 的分布范围)。所揭示的线粒体基因组从 M. arvalis 向 M. obscurus 的非对称导入可能是由于 M. obscurus 入侵 M. arvalis 的分布区而形成的杂交区。利佩茨克 "横断面与上述三个横断面的不同之处在于,它的支系非常狭窄,中心几乎重合。利佩茨克 "横断面的这种特征显然是由于杂交区位于沃罗涅日河沿岸的这一地段造成的。根据所获得的结果,我们认为所研究的杂交区的结构主要是由其中心与当地物理屏障的重合(或不重合)决定的。
Structure of the Hybrid Zone between Allied Species of the Common Vole, Microtus arvalis and M. obscurus: Influence of Genetic Factors and Landscape-Geographical Conditions
Abstract
Patterns of introgression of several genetic markers across the hybrid zone between allied species of the common vole Microtus arvalis s. str. and M. obscurus was studied in four of its sections: in northwest Nizhny Novgorod oblast, east Vladimir and southwest Nizhny Novgorod oblasts, south Lipetsk oblast, and northwest Voronezh oblast. Analysis of the clinal variability for three molecular genetic markers (cytb, tp53, SMCY11) and for karyotypes showed a structural similarity between the “Vladimir–Nizhny Novgorod,” “Nizhny Novgorod,” and “Voronezh” sections. The maximum width was shown for the cytb cline; the minimum width was shown for the SMCY11 cline; the tp53 cline and chromosomal cline occupy an intermediate position for this parameter. Furthermore, in these transects, the center of the cline for the cytb is shifted southeastward (into the distribution range of M. obscurus) from the centers of three other clines. The revealed asymmetric introgression of mitochondrial genome from M. arvalis to M. obscurus may be explained by the fact that the hybrid zone was formed as a result of invasion of M. obscurus into the range of M. arvalis. The “Lipetsk” transect differs from the three above-mentioned transects in very narrow clines with nearly coinciding centers. Such characteristics of the “Lipetsk” transect are obviously caused by localization of the hybrid zone in this section along Voronezh River. The obtained results led us to suppose that the structure of the studied hybrid zone is determined mainly by coincidence (or noncoincidence) of its center with local physical barriers.
期刊介绍:
Russian Journal of Genetics is a journal intended to make significant contribution to the development of genetics. The journal publishes reviews and experimental papers in the areas of theoretical and applied genetics. It presents fundamental research on genetic processes at molecular, cell, organism, and population levels, including problems of the conservation and rational management of genetic resources and the functional genomics, evolutionary genomics and medical genetics.