中文摘要：

根据LZ复杂性的原理,提出了序列间条件LZ复杂性的概念.基于条件LZ复杂性,定义了非空序列间的LZ复杂性距离.选取20种有胎盘哺乳动物,以它们的全线粒体基因组作为分子数据,计算两两之间的LZ复杂性距离,得出距离矩阵.根据计算出的LZ复杂性距离矩阵重构了20种有胎盘哺乳动物的系统进化树.基于LZ复杂性距离所得的系统进化树支持有胎盘哺乳动物中的灵长动物（Primates）、原蹄动物（Ferungulate）和啮齿动物（Rodents）三者之间灵长动物与原蹄动物之间亲缘关系更近一些的观点.

英文摘要：

According to the principle of LZ complexity, the concept of condition LZ complexity between two sequences was proposed. A LZ complexity distance measure between two nonnull sequences was defined based on the condition LZ complexity. Distance values between two sequences were calculated using the molecular data of complete mitochondrial genomes derived from 20 Eutherian animals, then the distance matrix was obtained. A phylogenetic tree was reconstructed under the sequence LZ complexity distance matrix. The phylogenetic tree, reconstructed based on LZ complexity distance, surpports the suggestion that among the three main groups of placental mammals, i.e. Primates, Ferungulates, and Rodents, the former two are more geneticall rated.