ГЕНЕТИЧЕСКИЙ ДРЕЙФ И ПОТОК ГЕНОВ В ПОПУЛЯЦИЯХ БОЛЬШОЙ ПЕСЧАНКИ

Acta Biomedica Scientifica

В. В. Сутягин¹ 

[1] РГУ «Талдыкорганская противочумная станция»

关键词: большая песчанка;    популяция;    генетический дрейф;    поток генов;   

DOI  :  10.29413/ABS.2018-3.4.22

学科分类：自然科学（综合）

来源: Scientific entre for Family Health and Human Reproduction Problems

【 摘 要 】

The article describes the additional evolutionary factors, apart from natural selection, which can influence the genetic structure of the  populations of the main carriers of the plague microbe – the great  gerbil. The influence of genetic drift on random fluctuation of alleles  is considered. With the help of a stochastic matrix, on the example  of the family group of gerbils consisting of four individuals, the  probabilities of the transition of allele frequencies from parents to  offspring are calculated. Based on the previously calculated size of  the neighborhood in gerbils, it is concluded that any large population  of great gerbils can be considered as small in terms of deviation of gene frequencies. In such small groups – parcels –  the drift of genes will be of great importance. In addition, the effect  of the gene flow on the genetic structure of the gerbil population on  the example of the simplest population model “continent-island” is  considered. The dynamics of changes in allelic frequencies for 100  generations has been calculated. It is shown that the allele  frequency during the 20-30 generations changes at the maximum  rate, and then slows as the equilibrium is approached. It is  concluded that different populations of gerbils should be considered  as separate historically formed structures, with different sequence of influence of external environmental factors on them.

【 授权许可】

CC BY