Chromosome inversions suppress genetic recombination and establish co-adapted gene complexes, or supergenes. The 2La inversion is a widespread polymorphism in the Anopheles gambiae species complex, the major African mosquito vectors of human malaria. Here we show that alleles of the 2La inversion are associated with natural malaria infection levels in wild-captured vectors from West and East Africa. Mosquitoes carrying the more-susceptible allele (2L+a) are also behaviorally less likely to be found inside houses. Vector control tools that target indoor-resting mosquitoes, such as bednets and insecticides, are currently the cornerstone of malaria control in Africa. Populations with high levels of the 2L+a allele may form reservoirs of persistent outdoor malaria transmission requiring novel measures for surveillance and control. The 2La inversion is a major and previously unappreciated component of the natural malaria transmission system in Africa, influencing both malaria susceptibility and vector behavior.

译文

染色体倒位抑制遗传重组并建立共同适应的基因复合物或超基因。2La反转是冈比亚按蚊物种复合体 (人类疟疾的主要非洲蚊子媒介) 中广泛存在的多态性。在这里,我们显示2La反转的等位基因与来自西非和东非的野生捕获载体中的自然疟疾感染水平有关。携带更敏感的等位基因 (2L a) 的蚊子在行为上也不太可能在房屋内被发现。针对室内静止蚊子的病媒控制工具,如蚊帐和杀虫剂,目前是非洲疟疾控制的基石。2L a等位基因水平高的人群可能会形成持续的室外疟疾传播库,需要采取新的监测和控制措施。2La倒置是非洲自然疟疾传播系统的主要且以前未被重视的组成部分,影响疟疾的易感性和媒介行为。

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