Nuclear rDNA-based molecular clock of the evolution of Triatominae (Hemiptera: Reduviidae), vectors of Chagas disease
Nuclear rDNA-based molecular clock of the evolution of Triatominae (Hemiptera: Reduviidae), vectors of Chagas disease
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DOI：
10.1590/s0074-02762000000400020
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发表时间：
2000-07-01
影响因子：
2.8
通讯作者：
Mas-Coma, S
中科院分区：
文献类型：
--
作者：
Bargues, MD;Marcilla, A;Mas-Coma, S
锥蝽虫谱系的进化历史和分化时间是根据这些 reduviids 核糖体 DNA 的小亚基 SSU (18S) 和第二内部转录间隔区 (ITS-2) 的核苷酸序列推断的分子钟来估计的。锥蝽亚科和一般原嘴半翅目的 18S rDNA 分子钟频率似乎为每 1 亿年 1.8%（我的）。锥蝽亚科中的 ITS-2 分子钟速率估计为每 Imy 0.4-1% 左右，表明 ITS-2 的进化速度比 18S rDNA 快 23-55 倍。关于锥蝽亚科进化的推断时间数据与当前关于其进化历史的假设非常吻合，但建议重新考虑北美物种复合体的当前分类法。
The evolutionary history and times of divergence of triatomine bug lineages are estimated from molecular clocks inferred from nucleotide sequences of the small subunit SSU (18S) and the second internal transcribed spacer (ITS-2) of the nuclear ribosomal DNA of these reduviids. The 18S rDNA molecular clock rate in Triatominae, and Prosorrhynchan Hemiptera in general, appears to be of 1.8% per 100 million years (my). The ITS-2 molecular clock rate in Triatominae is estimated to be around 0.4-1% per I my, indicating that ITS-2 evolves 23-55 times faster than 18S rDNA. Inferred chronological data about the evolution of Triatominae fit well with current hypotheses on their evolutionary histories, but suggest reconsideration of the current taxonomy of North American species complexes.