The effect of the basin of the Gurgueia River (perennial river in the semiarid region of Brazil) on the dispersion and migration of Africanized bees (Apis mellifera) was evaluated using six microsatellite markers. Four municipalities located within (n = 53 colonies) and three outside the Gurgueia River Basin (n = 41 colonies) were sampled. Based on the number of alleles found (mean of 18.5 alleles per locus ±4.18), we concluded that there was high genetic diversity. Estimates of population differentiation (FST) were significant among different localities, except for the populations of Corrente, Cristino Castro, and Bertolínia, which are within the river basin. At a regional level, analysis of molecular variance (AMOVA) and Bayesian approaches corroborated this result, indicating greater connectivity among populations in the valley. For the remaining populations collected outside the valley, no defined pattern of population structure was observed.

中文翻译：

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巴西半干旱地区河谷非洲化蜜蜂的遗传结构

使用六个微卫星标记评估了古尔盖亚河流域（巴西半干旱地区的多年生河流）对非洲蜜蜂（Apis mellifera）的扩散和迁移的影响。对位于古尔盖亚河流域内的四个自治市（n = 53 个殖民地）和三个位于古尔盖亚河流域外的自治市（n = 41 个殖民地）进行了采样。根据发现的等位基因数量（每个基因座 18.5 个等位基因的平均值±4.18），我们得出结论，遗传多样性很高。除了河流流域内的科伦特、克里斯蒂诺·卡斯特罗和贝尔托利尼亚的人口外，不同地区的人口分化 (FST) 估计值很显着。在区域层面，分子方差分析 (AMOVA) 和贝叶斯方法证实了这一结果，表明山谷中种群之间的连通性更强。