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首页> 外文期刊>Journal of Medical Entomology >Spatial and temporal variation in kinship among Anopheles gambiae (Diptera : Culicidae) mosquitoes
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Spatial and temporal variation in kinship among Anopheles gambiae (Diptera : Culicidae) mosquitoes

机译：冈比亚按蚊（Diptera：Culicidae）蚊之间亲属的时空变化

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Genetic relatedness (kinship) among Anopheles gambiae Giles female mosquitoes was assessed using microsatellite loci in five locations across Africa and in nine samples taken between 1994 and 1999 in western Kenya. We assessed variation among samples in kinship as well as the effect of distance on kinship. Relatedness within populations was low, and differences among samples taken at various times from one locate and from different locales were minimal. Mosquitoes collected from the same compound were slightly more closely related than those collected from different compounds. Our results suggest that newly emerged female siblings move relatively short distances into a few nearby compounds for blood feeding, but that they lay eggs in a more distant location. Kinship decreased nonlinearly with increasing distance. The strongest relationship between kinship and distance was observed for mosquitoes collected 0-3 km apart (-0.014/km, P < 0.001). The effect of distance decreased with increasing distance between mosquitoes; at 7 km or more, the kinship/ distance slope approached zero and the intercept became negative, suggesting that beyond this range kinship does not decline with distance. This distance may thus represent the upper limit of the diameter of the basic reproductive unit. Nevertheless, the effect of distance on kinship is weak, reflecting extensive dispersal. Because females mate within days after emergence from larval habitats, where the likelihood of mating with a sibling is presumably highest, we propose a slight inbreeding effect.
机译：使用微卫星基因座在非洲的五个地区和1994年至1999年在肯尼亚西部采集的九个样本中评估了冈比亚按蚊吉尔斯雌蚊之间的遗传相关性（亲缘关系）。我们评估了血缘关系样本之间的差异以及距离对血缘关系的影响。群体内的相关性很低，并且在一个地点和不同地点在不同时间采集的样本之间的差异很小。与从不同化合物中收集的蚊子相比，从相同化合物中收集的蚊子的亲缘关系更为紧密。我们的研究结果表明，新近出现的雌性兄弟姐妹在相对较短的距离内移入附近的几个地方供血，但它们在更远的地方产卵。亲缘关系随着距离的增加而非线性降低。对于相距0-3 km的蚊子，亲属关系和距离之间的关系最强（-0.014 / km，P <0.001）。距离的影响随着蚊子之间距离的增加而降低;在7 km或更长的距离上，亲缘关系/距离斜率接近零，截距变为负值，这表明在此范围之外，亲缘关系不会随着距离而下降。因此，该距离可以代表基本生殖单元的直径的上限。然而，距离对亲属关系的影响微弱，反映了广泛的分散。由于雌性从幼虫栖息地出来后几天内就交配，那里与兄弟姐妹交配的可能性最高，因此我们建议进行近交。

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