Wang Jian-Feng, Jiang Li-Yun, Qiao Ge-Xia
Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, No. 1 Beichen West Road, Chaoyang District, Beijing 100101, P.R. China.
Zookeys. 2011(122):1-17. doi: 10.3897/zookeys.122.1256. Epub 2011 Aug 11.
Aphids of the subtribe Aphidina are found mainly in the North Temperate Zone. The relative lack of diagnostic morphological characteristics has hindered the identification of species in this group. However, DNA-based taxonomic methods can clarify species relationships within this group. Sequence variation in a partial segment of the mitochondrial COI gene was highly effective for identifying species within Aphidina. Thirty-six species of Aphidina were identified in a neighbor-joining tree. Mean intraspecific sequence divergence in Aphidina was 0.52%, with a range of 0.00% to 2.95%, and the divergences of most species were less than 1%. Mean interspecific divergence within previously recognized genera or morphologically similar species groups was 6.80%, with a range of 0.68% to 11.40%, with variation mainly in the range of 3.50% to 8.00%. Possible reasons for anomalous levels of mean nucleotide divergence within or between some taxa are discussed.
蚜亚族的蚜虫主要分布在北温带。相对缺乏诊断性的形态特征阻碍了该类群物种的鉴定。然而，基于DNA的分类方法可以厘清该类群内的物种关系。线粒体COI基因部分片段的序列变异对鉴定蚜亚族内的物种非常有效。在邻接树上鉴定出了36种蚜亚族蚜虫。蚜亚族内种内序列平均分歧度为0.52%，范围为0.00%至2.95%，大多数物种的分歧度小于1%。在先前认可的属或形态相似的物种组内，种间平均分歧度为6.80%，范围为0.68%至11.40%，变异主要在3.50%至8.00%之间。讨论了一些分类单元内部或之间平均核苷酸分歧度异常水平的可能原因。
