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Population genetic structure of Bemisia tabaci (Hemiptera: Aleyrodidae) utilizing microsatellite markers

机译:利用微卫星标记分析烟粉虱的遗传种群结构(Hemiptera:aleyrodidae)

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摘要

We aimed to characterize the population genetic structure within and among five Bemisia tabaci (Gennadius) populations collected from different host plants and geographic regions by using microssatelites as a molecular marker. Each population was represented by 19 specimens. The host plants and geographic origins of these populations were described as follows: Pop 1: Squash Barreiras (BA); Pop 2: Cotton Barreiras (BA); Pop 3: Soybean Campinas (SP); Pop 4: Tomato Cruz das Almas (BA); and Pop 5: Soybean Rondonópolis (MT). Six polymorphic loci were observed, which discriminated 31 different alleles in the studied populations, with a mean number of alleles per population of 3.30 (2.67 - 4.00). Using Fisher's Exact test, it was observed that at least three populations were in Hardy-Weinberg equilibrium for most of the studied loci (six). The dendrogram (UPGMA) separated populations into groups mainly related to the geographic origin of the samples. Only population 5 differed from the others at a 0.15 distance (74.5% group consistency). The most similar populations were 1 and 2, with a 0.01 distance (65.3%). This is in agreement with their geographic origins and it was not consistent with host specificity. The results suggest considerable gene flow (7.3%) among all whitefly populations and indicate that a better understanding of the gene flow in populations of B. tabaci associated with different hosts is required for the management of this insect.
机译:我们旨在通过使用微卫星作为分子标记来表征从不同寄主植物和地理区域收集的五个烟粉虱(Gennadius)种群内部和之中的种群遗传结构。每个人口代表19个标本。这些种群的寄主植物和地理起源描述如下:Pop 1:南瓜Barreiras(BA);流行音乐2:棉花巴雷拉斯(BA);流行三:大豆坎皮纳斯(SP);流行四:番茄克鲁兹达斯阿尔玛斯(BA);流行音乐5:大豆Rondonópolis(MT)。观察到六个多态性基因座,其在研究的群体中区分出31个不同的等位基因,每群体的平均等位基因数量为3.30(2.67-4.00)。使用Fisher精确检验,对于大多数研究位点(六个),观察到至少三个种群处于Hardy-Weinberg平衡状态。树状图(UPGMA)将种群分为主要与样品的地理起源有关的组。只有总体5与其他群体的距离相差0.15(组一致性为74.5%)。最相似的人口是1和2,距离为0.01(65.3%)。这与它们的地理起源是一致的,并且与宿主的特异性不一致。结果表明在所有粉虱种群中有相当大的基因流(7.3%),并表明需要更好地了解与不同寄主相关的烟粉虱种群中的基因流,以管理该昆虫。

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