Morphometric and molecular evidence of intraspecific biogeographical differentiation of Rhodnius pallescens (HEMIPTERA: REDUVIIDAE: RHODNIINI) from Colombia and Panama.
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.
Grupo de Biología y Control de Enfermedades Infecciosas - BCEI, Sede de Investigación Universitaria - SIU, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia. amgomezpa@gmail.com
Andrés
A
Gómez-Palacio
Nicolás
N
Jaramillo-O
Harling
H
Caro-Riaño
Sebastián
S
Diaz
Fernando A
FA
Monteiro
Ruben
R
Pérez
Francisco
F
Panzera
Omar
O
Triana
D000704:Analysis of Variance; D000818:Animals; D003105:Colombia; D045303:Cytochromes b / Q000235:genetics; D019143:Evolution, Molecular; D017344:Genes, Insect; D014644:Genetic Variation; D006239:Haplotypes; D007303:Insect Vectors / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics; D008297:Male; D010176:Panama; D010802:Phylogeny; D012239:Rhodnius / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics; D017422:Sequence Analysis, DNA; D014921:Wings, Animal / Q000033:anatomy & histology
D045303:Cytochromes b