Pérez de Rosas Alicia R, Segura Elsa L, Fusco Octavio, Guiñazú Adolfo L Bareiro, García Beatriz A
Cátedra de Bioquímica y Biología Molecular, Facultad de Ciencias Médicas, INICSA (CONICET-Universidad Nacional de Córdoba), Ciudad Universitaria, Córdoba, Argentina.
Genetica. 2013 Mar;141(1-3):107-17. doi: 10.1007/s10709-013-9710-0. Epub 2013 Mar 7.
Fine scale patterns of genetic structure and dispersal in Triatoma infestans populations from Argentina was analysed. A total of 314 insects from 22 domestic and peridomestic sites from the locality of San Martín (Capayán department, Catamarca province) were typed for 10 polymorphic microsatellite loci. The results confirm subdivision of T. infestans populations with restricted dispersal among sampling sites and suggest inbreeding and/or stratification within the different domestic and peridomestic structures. Spatial correlation analysis showed that the scale of structuring is approximately of 400 m, indicating that active dispersal would occur within this distance range. It was detected difference in scale of structuring among sexes, with females dispersing over greater distances than males. This study suggests that insecticide treatment and surveillance should be extended within a radius of 400 m around the infested area, which would help to reduce the probability of reinfestation by covering an area of active dispersal. The inferences made from fine-scale spatial genetic structure analyses of T. infestans populations has demonstrated to be important for community-wide control programs, providing a complementary approach to help improve vector control strategies.
对来自阿根廷的侵扰锥猎蝽种群的精细遗传结构模式和扩散情况进行了分析。对来自圣马丁地区（卡塔马卡省卡帕扬县）22个家庭和周边地区的总共314只昆虫，针对10个多态性微卫星位点进行了分型。结果证实了侵扰锥猎蝽种群的细分，且采样地点之间的扩散受限，并表明在不同的家庭和周边结构中存在近亲繁殖和/或分层现象。空间相关性分析表明，结构尺度约为400米，这表明活跃扩散将在这个距离范围内发生。检测到两性之间的结构尺度存在差异，雌性的扩散距离比雄性更远。这项研究表明，应在受侵染区域周围400米半径范围内扩大杀虫剂处理和监测范围，这将有助于通过覆盖活跃扩散区域来降低再次侵染的概率。从侵扰锥猎蝽种群的精细尺度空间遗传结构分析得出的推论已证明对全社区控制计划很重要，为帮助改进病媒控制策略提供了一种补充方法。
