Phenotypic and genetic variation of Triatoma costalimai (Hemiptera: Reduviidae)

Abstract INTRODUCTION: We aimed to study intraspecific variation in Triatoma costalimai, a potential vector of Chagas disease present in Brazil and Bolivia. METHODS: We analyzed phenotypic (connexivum color patterns, wing morphometrics) and genetic variation (16S mtDNA) of three Brazilian T. costalimai populations. We compared 16S sequences with those of putative Bolivian T. costalimai and its sister species, T. jatai. RESULTS: Brazilian populations had different connexivum color patterns and forewing shapes. A 16S mtDNA haplotype network showed a clear separation of Brazilian T. costalimai from both T. jatai and Bolivian T. costalimai. CONCLUSIONS: We report considerable variability in T. costalimai populations.

摘要 引言：本研究旨在探讨科斯塔利马锥蝽（Triatoma costalimai）的种内变异，该物种是巴西与玻利维亚境内的恰加斯病（Chagas disease）潜在传播媒介。方法：本研究对巴西境内的3个科斯塔利马锥蝽种群的表型（侧接缘色斑模式、翅形态测量）与遗传变异（16S线粒体DNA（16S mtDNA））进行了分析，并将测得的16S序列与推定的玻利维亚科斯塔利马锥蝽及其姊妹种贾泰锥蝽（T. jatai）的对应序列进行了比对。结果：巴西种群的侧接缘色斑模式与前翅形态均存在显著差异。16S线粒体DNA单倍型网络分析结果显示，巴西科斯塔利马锥蝽与贾泰锥蝽、玻利维亚科斯塔利马锥蝽均存在清晰的遗传分化。结论：本研究证实科斯塔利马锥蝽种群存在显著的种内变异。