利用最大似然估计原理，给出了构建系统发生树的模型和算法。
A model and an algorithm were provided for constructing phylogenetic tree based on the principle of maximum likelihood estimate.
它是提供使用全部基因组序列数据计算病毒物种系统发生树的第一个资源。
It is the first resource to provide phylogenetic trees of viral species computed using whole-genome sequence data.
目的建立风疹病毒包膜糖蛋白e1的克隆载体；研究e1基因变异情况，并对其序列进行系统发生树分析。
Objectives to construct the cloning vector of glycoprotein E1 gene of rubella virus, to study the mutation of glycoprotein E1 gene, and to analyze the sequence of E1 gene by the phylogenetic tree.
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