基于CoI序列对鹀亚科分子系统发育关系研究

Molecular Phylogenetic Analysis of Some Emberizinae Species Based on Mitochondrial Gene CoI Sequences

以线粒体DNA的CoI基因全序列作为分子标记,对鹀亚科19种鸟类系统发生关系进行了分析.结果显示:全序列中含有保守位点810个,可变位点403个,简约信息位点269个.采用邻接法、最大简约法分别构建系统发生树,结果表明:铁爪鹀(Calcarius lapponicus)在鹀亚科中首先分化出来;蓝鹀(Latoucheornis siemsseni)和黄喉鹀(Emberiza elegans)亲缘关系较近,认为蓝鹀是鹀属(Emberiza)类群的一个种,不支持将它单列为一个属;小鹀(Emberiza pallasi)与红颈苇鹀(Emberiza yessoensis)之间具有较近的亲缘关系,形成姐妹关系.

Based on the mitochondrial CoI gene sequences, Phylogenetic relationships of 19 Embefizinae species were analyzed. The results showed that the conserved sites were 810, the variable sites were 403, and parsimony information sites were 269. Identical tree topologies were made by the methods of neighbor-joining （NJ） and maximum parsimony （MP）. Results indicated that Calcarius lapponicus was diverged first from Emberizinae, that there was closer relationship between Latoucheornis siemsseni and Emberiza elegans, and that Latoucheornis siemsseni belonged to one species of Emberiza instead of classifying it into a separate species. Emberiza pallasi was also closely related to Emberiza yessoensis, they are sister groups.