MOLECULAR PHYLOGENETIC ANALYSES INDICATE THAT THE IXODES RICINUS COMPLEX IS A PARAPHYLETIC GROUP
MOLECULAR PHYLOGENETIC ANALYSES INDICATE THAT THE IXODES RICINUS COMPLEX IS A PARAPHYLETIC GROUP
复制标题
分子系统发育分析表明蓖麻混合群是一个并系群
作者：
Guang Xu;Q. Fang;J. E. Keirans;L. Durden
蓖麻硬蜱是一组分布在世界几乎所有地理区域的蜱类。莱姆疏螺旋体螺旋体主要由该复合体内的蜱类传播。据推测，世界各地的莱姆病媒介蜱密切相关，代表一个单系群。这意味着蜱蜱中莱姆病媒介的能力可能只进化了一次。为了检验这个假设，我们使用了分子系统发育方法。对来自蓖麻复合体中的 11 个物种和其他 16 个硬蜱物种的线粒体 16S 核糖体脱氧核糖核酸的两个片段进行了测序。使用贝叶斯方法进行的系统发育分析表明，蓖麻 I. ricinus 复合体不是一个单系类群，除非其中包含另外 3 个硬蜱物种。世界不同地区已知的莱姆病病原体的主要传播媒介并不是姊妹类群。这表明硬蜱获得传播疏螺旋体病病原体的能力可能有多个来源。
The Ixodes ricinus species complex is a group of ticks distributed in almost all geographic regions of the world. Lyme borreliosis spirochetes are primarily transmitted by tick species within this complex. It has been hypothesized that the Lyme vector ticks around the world are closely related and represent a monophyletic group. This implies that vector competence in ixodid ticks for Lyme agents might have evolved only once. To test this hypothesis, we used a molecular phylogenetic approach. Two fragments of mitochondrial 16S ribosomal deoxyribonucleic acid were sequenced from 11 species in the I. ricinus complex and from 16 other species of Ixodes. Phylogenetic analysis using Bayesian methodology indicated that the I. ricinus complex is not a monophyletic group unless 3 additional Ixodes species are included in it. The known major vectors of Lyme disease agents in different areas of the world are not sister taxa. This suggests that acquisition of the ability to transmit borreliosis agents in species of Ixodes may have multiple origins.
影响因子：
10.7
作者：
Yang, ZH;Rannala, B
通讯作者：
Rannala, B