Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-São José do Rio Preto, São José do Rio Preto, São Paulo, Brazil.
Laboratório de Parasitologia, Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-Araraquara, Araraquara, São Paulo, Brazil.
Am J Trop Med Hyg. 2019 Apr;100(4):911-913. doi: 10.4269/ajtmh.17-0813.
Triatomines are vectors of , the etiologic agent of Chagas disease. Although the evolutionary process in triatomine is considered as disruptive, cryptic speciation and homoploid hybridization also are possible modes of speciation. Several analyses suggested as a product of hybridization between and . Thus, we analyzed genetic characteristics (chromosomal analysis, genetic distance for the mitochondrial ND1 gene, and the pattern of bands of internal transcribed spacer [ITS]-1) of these species, with emphasis on the phenomenon of homoploid hybridization. All species showed the same cytogenetic characteristics, low genetic distance for ND1 gene, and the same pattern of ITS-1 bands. We consider that these genetic characteristics, together with the large chromatic polymorphism and the viability of experimental crosses possibly are due to the processes of introgression that these species suffered during the process of homoploid hybridization.
锥蝽是克氏锥虫的传播媒介，克氏锥虫是恰加斯病的病原体。尽管在锥蝽的进化过程中被认为是破坏性的，但隐种形成和同倍杂交也可能是物种形成的模式。有几项分析表明，是 和 之间杂交的产物。因此，我们分析了这些物种的遗传特征（染色体分析、线粒体 ND1 基因的遗传距离以及内部转录间隔区 [ITS]-1 的带型），重点研究了同倍杂交的现象。所有物种均表现出相同的细胞遗传特征、低 ND1 基因遗传距离和相同的 ITS-1 带型。我们认为，这些遗传特征，以及大的染色质多态性和实验杂交的可行性，可能是由于这些物种在同倍杂交过程中经历了基因渗入过程。
