( accession numbers : ay184425 - ay184440 ) . combined with other several full 12s rrna sequences of chinese water deer , montijac , water deer , cow , horse , goat and tragulus retrieved from genbank database , the whole set of sequences was utilized for downstream analysis based on theories and models in molecular phylogeny , whereas the secondary structure of 12s rrna was predicted and analyzed based on present small subunit of ribosome model 将上述序列与从genbank检索到的獐、麂、水鹿、牛、马、羊、鼷鹿的12srrna基因全序列一起，通过应用分子系统学理论与模型分析序列数据，以及对12srrna二级结构的分析，得出了以下主要结论： ( 1 )用最小进化方法( me )和邻接法( nj )对12srrna基因的全序列构建分子系统树的拓扑结构基本相同。
