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首页> 外文期刊>Biology Bulletin Reviews >Correlation between Level of Chromosomal Aberrations and Demographic Parameters
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Correlation between Level of Chromosomal Aberrations and Demographic Parameters

机译：染色体畸变水平与人口统计学参数的相关性

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The correlation between the level of chromosomal abnormalities and demographic parameters has been studied using individuals from a local wildlife population of the bank vole (Clethrionomys glareolus) from a Middle Ural locality in the southern taigasubzone (57°15' N, 58°44' E). Variations in the rate of structural chromosomal aberrations, gaps, and changes in the number of chromosomes in the bone marrow cells of the bank vole has been examined using routine cytogenetic methods. The effect of demographic parameters, i.e., population density, age, sex, and reproductive status, has been estimated using log-linear analysis. It has been shown that the share of individuals with an elevated rate of cells that carry structural chromosomal abnormalitiesand gaps decreases with increases the population size. This pattern agrees with the standpoint that a lower rate of mutations in somatic cells enhances survival of organisms. This pattern can have established as a consequence of natural selection, whichinduces the rearrangement of the genetic structure in the population or as a byproduct of other processes in the population that accompanies the changes in its size. A high population density leads to an increase in the share of individuals that displayan elevated rate of cells with abnormal chromosome numbers among the yearling voles. A similar effect may result from an asymmetric interference competition between adults and yearling individuals. Our results demonstrate that the proportion of animals that display an elevated rate of somatic cells with structural chromosomal abnormalities and aberrant chromosome numbers considerably increases with age, which agrees with both the theoretical concepts and experimental data. Neither sex nor involvement inreproduction has any significant effect on the level of cytogenetic instability.
机译：染色体异常水平与人口统计学参数之间的相关性已使用来自南针叶林次大陆中部乌拉尔地区（北纬57°15'，东经58°44'）的当地田鼠（田鼠（Clethrionomys glareolus））的个体进行了研究。 ）。使用常规的细胞遗传学方法已经检查了田鼠骨髓细胞中结构染色体畸变率，缺口和染色体数目变化的变化。人口统计学参数的影响，即人口密度，年龄，性别和生殖状况，已使用对数线性分析进行了估计。研究表明，随着细胞数量的增加，携带结构性染色体异常和缺口的细胞比例升高的个体所占的比例下降。这种模式与这样的观点一致，即体细胞中较低的突变率可提高生物体的存活率。这种模式可能是自然选择的结果，自然选择会导致种群中遗传结构的重排，或者是种群大小变化所伴随的其他过程的副产品。高种群密度导致一岁田鼠中显示异常染色体数目的细胞比率升高的个体比例增加。成人和一岁个体之间的不对称干扰竞争可能会产生类似的效果。我们的结果表明，随着年龄的增长，显示出具有结构性染色体异常和染色体异常数目的体细胞比例升高的动物比例显着增加，这与理论概念和实验数据均相符。性别或生殖不参与都不会对细胞遗传学的不稳定性产生任何重大影响。

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