三、群体分化和归属分析软件Structure
Structure是一种基于模型分类方法来推断群体结构的小型软件,它可于互联网上直接下载(链接网址为http://pritch.bsd.uchicago.edu/structure.htmL)。Structure软件具有多方面的功能,它可以展现群体的结构,还可在有群体混合时区分开不同的遗传群体,并对每个个体所属的群体进行判别。另外,它还可识别移民个体和混血个体(亲代来自于不同亚群)。例如,我们假设一个大的群体中包含有K个亚群(可已知或未知),其中每个群体都有其自身特点,如各基因座等位基因频率会互不相同。而对于任何一个给定的个体,我们可用该软件来计算这个给定的个体分配到不同亚群中的概率(特别是如果该个体属于混血个体,则可得到将其分配到两个或两个以上的联合群体的概率)。
(饶绍奇 左晓宇 黄 珂 范安苏 伟扬袁满琼)
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