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首页> 外文期刊>Journal of Medical Entomology >Amplified fragment length polymorphism used to investigate genetic variability of the stable fly (Diptera: Muscidae) across North America.
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Amplified fragment length polymorphism used to investigate genetic variability of the stable fly (Diptera: Muscidae) across North America.

机译：扩增的片段长度多态性用于研究整个北美稳定蝇（双翅目：蝇科）的遗传变异性。

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摘要

The stable fly, Stomoxys calcitrans (L.), is a cosmopolitan pest of livestock and humans. The pestiferous nature and painful bite cause stress to cattle and other animals. The stress and resulting avoidance behaviors manifest as reductions in weight gain or milk production in cattle; estimated annual economic loss in the United States exceeds US$2 billion. Understanding the population genetics of stable flies could provide information on their population dynamics, origins of outbreaks, and geographical patterns of insecticide resistance, resulting in a tactical advantage for developing management strategies. Previous studies, mostly on a local scale, reported a high level of gene flow between locations. Here, we report results wherein amplified fragment length polymorphism was used to determine genetic diversity of stable fly samples consisting of 11-40 individuals from 12 locations representing the United States, Canada, and Panama. The Analysis of Molecular Variance showed that the majority of genetic diversity was within groups; very little was among groups. The FST and GST values were low (<0.4), Nm values high (>1.0). The tests of neutrality suggested population expansion, and no genetic differentiation was found between locations. These results show that stable flies have a high level of gene flow on a continental scale, with limited isolation owing to distance or geographical barriers.
机译：稳定的蝇Stomoxys calcitrans（L.），是家畜和人类的世界性害虫。害虫的性质和痛苦的叮咬会给牛和其他动物造成压力。压力和避免的行为表现为牛体重增加或产奶量减少;据估计，美国每年的经济损失超过20亿美元。了解稳定蝇的种群遗传学可以提供有关其种群动态，暴发起源以及抗药性地理分布的信息，从而为制定管理策略提供战术优势。以前的研究，大多是在局部研究中，报告了不同地点之间的高水平基因流动。在这里，我们报告结果，其中扩增的片段长度多态性用于确定由来自美国，加拿大和巴拿马的12个地区的11-40个个体组成的稳定果蝇样品的遗传多样性。分子差异分析表明，大多数遗传多样性都在群体内;人群中很少。 F ST 和G ST 值低（<0.4），Nm值高（> 1.0）。中立性测试表明人口正在增加，并且在两个地点之间未发现遗传分化。这些结果表明，稳定的果蝇在大陆范围内具有高水平的基因流动，由于距离或地理障碍，隔离程度有限。

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