Egorova A V, Ratner V A, Iudanin A Ia
Department of Cytology and Genetics, Novosibirsk State University, Novosibirsk, 630090 Russia.
Genetika. 2003 Apr;39(4):540-9.
Computer simulation of the population dynamics of the genomic patterns of polygenes, transposable elements (TEs), and origin identity labels (OILs) in the course of negative selection for an additive quantitative trait has been performed. It was demonstrated that active polygene alleles disappear very rapidly, whereas the patterns of TEs and OILs continue their evolution determined by strict selective inbreeding and gene drift. Dendrograms of the patterns of polygenes, TEs, and OILs were constructed for all generations. It was demonstrated that the final consensus pattern of OILs consists of the fragments of the original patterns, which contain neither active polygene alleles nor modifier or marker TEs. Neutral TE copies were present in the final pattern, as should be expected in the case of gene drift. Inbreeding coefficient increased steadily but by generation 100 reached values higher than 0.9. All other parameters and initial conditions being the same, the responses to negative and positive selections were asymmetric.
对加性数量性状进行负选择过程中多基因、转座元件(TEs)和起源身份标签(OILs)的基因组模式的群体动态进行了计算机模拟。结果表明,活跃的多基因等位基因消失得非常迅速,而TEs和OILs的模式则继续由严格的选择近亲繁殖和基因漂变决定其进化。构建了所有世代的多基因、TEs和OILs模式的树状图。结果表明,OILs的最终共识模式由原始模式的片段组成,这些片段既不包含活跃的多基因等位基因,也不包含修饰或标记TEs。正如在基因漂变情况下所预期的那样,最终模式中存在中性TE拷贝。近亲繁殖系数稳步增加,但到第100代时达到高于0.9的值。在所有其他参数和初始条件相同的情况下,对负选择和正选择的反应是不对称的。