Grupo de Biología y Control de Enfermedades Infecciosas - BCEI, Sede de Investigación Universitaria - SIU, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia.
Infect Genet Evol. 2012 Dec;12(8):1975-83. doi: 10.1016/j.meegid.2012.04.003. Epub 2012 May 24.
Rhodnius pallescens is considered the main vector of Chagas disease in Panama and a relevant secondary vector in northern Colombia. Previous data reported that this species presents cytogenetically heterogeneous populations, which are probably biogeographically segregated. To provide new information on the diversity of R. pallescens, we compared several populations from Colombia and Panama based on the morphometric analyses of wings, mitochondrial cytochrome b (cyt b) gene sequencing, and genomic DNA measurements. Although no differences in DNA amount were detected, significant differences in cyt b sequences as well as wing size and shape were identified among populations. The results obtained in this work indicate R. pallescens comprises two evolutionary lineages with genetic and morphological differences that could be explained by their geographic isolation in distinct ecological zones. These results provide new insight into R. pallescens population diversity and the underlying biological processes that shape its evolution.
棕尾𫛚被认为是巴拿马恰加斯病的主要传播媒介，也是哥伦比亚北部的一个重要次要传播媒介。先前的数据表明，该物种存在细胞遗传上的异质种群，这些种群可能在生物地理上是隔离的。为了提供棕尾𫛚多样性的新信息，我们比较了来自哥伦比亚和巴拿马的几个种群，这些种群是基于翅膀的形态分析、线粒体细胞色素 b（cyt b）基因测序和基因组 DNA 测量得出的。尽管没有检测到 DNA 数量的差异，但在 cyt b 序列以及翅膀大小和形状方面，种群之间存在显著差异。这项工作的结果表明，棕尾𫛚包含两个具有遗传和形态差异的进化谱系，这可以用它们在不同生态区的地理隔离来解释。这些结果为棕尾𫛚种群多样性以及塑造其进化的潜在生物学过程提供了新的见解。
