随机交配

Generally, whether the panmixia ratio is large or small, the population reaches to equilibrium after 1-10 generations.

普通群体依据随机交配率大小的不同，趋近平衡的时间不同。

When the panmixia ratio vary from 0 to 1, its influence on the genotype frequency are lessening, as for inbreeding coefficient, it is constant.Ninth.

并且随机交配率从0到1对基因型频率影响的程度由大逐渐变小，近交系数对基因型频率影响的程度始终一样。9。

Mathematical model 3.7, 3.16 and 3.30 are the mathematical model of a equilibrium population, and they can be converted into mathematical models of panmixia population and nonequilibrium selfing population.

它可以转换为随机交配群体的数学模型和非平衡自交群体的数学模型。

When population are in noneequilibrium, if we know the genotype frequency of one generation of common population, the genotype frequency of the next or any generation can be calculated on the basis of the panmixia ratio and gene frequency directly.

群体在非平衡条件下，如果已知普通群体某一世代的基因型频率，根据随机交配率、基因频率可直接推算下一代或任一世代的基因型频率。

To date, the panmixia hypothesis has remained unchallenged: genetic studies realized on eel's mitochondrial DNA failed to detect any genetic structure; and a similar lack of structure was found using allozymes, with the exception of clinal variation imposed by selection.

到目前为止，随机交配假说尚未得到挑战：通过线粒体研究未发现鳗鲡存在遗传结构，而利用同工酶也得到缺乏遗传结构的相似观点，而因选择引起的渐变群变异是例外。

Theeffective size of populations under maximum negative or positive assortive mating is larger thanrandom mating of selected parents.

同质和异质选配情况下，群体有效大小较选择的亲本随机交配要大，特别是异质选配。因此，采用异质选配，可以使选育与保种有机地结合起来。

In a large, randomly mating population that is free of disturbing forces, allele and genotypic frequencies do not change and are related in a simple way.

在一个大的，随机交配的人口是免费的令人不安的力量，等位基因与基因型频率不改变，并在有关的一个简单的方法。

So level of random breading were high between different individuals in the populations.

种豚草的异交率分别为0.5123和0.6393，其种群内植株间随机交配程度较高。

Cows from lactation 1 to lactation 5 account for 20% of the total cow population respectively, and refresh 20%(4, 000) afterwards which are the progenies of the best 12, 000 cows and 10 sires.

基础群中第1胎到第5胎母牛的比例均为20％，以后母牛群每年更新20％（4，000头），由优秀的12，000头母牛和10头种公牛随机交配产生。

This result is consistent with the result come from PCRfingerprinting method. The results of the two methods indicate that maize, soybeanand castor-oil plant can act as refuges of Bt sensitive cotton bollworm as non-Btcotton; while sesame and peanut may not.

第三代棉铃虫的六个寄主种群间存在一定的遗传差异；其中，花生种群与其他种群间没有明显的基因交流，遗传分化比较明显；Bt棉上的棉铃虫与普通棉花、大豆、玉米上的棉铃虫敏感种群间基因交流频繁；而与花生、芝麻上的棉铃虫敏感种群间的基因流均不显著，说明它们间有可能不能进行随机交配。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。