The fine-scale genetic structure of the two-spotted spider mite in a commercial greenhouse
The fine-scale genetic structure of the two-spotted spider mite in a commercial greenhouse
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DOI：
10.1007/s10493-008-9201-7
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发表时间：
2009-02
影响因子：
2.2
通讯作者：
R. Uesugi;Y. Kunimoto;M. Osakabe
中科院分区：
文献类型：
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作者：
R. Uesugi;Y. Kunimoto;M. Osakabe
利用7个微卫星标记对二斑叶螨的精细遗传结构进行了研究，以估计其在温室玫瑰树生境中的局部基因流。选择两个不同种群密度的玫瑰树床，在每个床中依次建立18个1.2m长的连续样方。杂合子缺乏是积极的样方内，这是最有可能的结果，因为螨通常形成小的繁殖菌落的Wahlund效应。低密度和频繁的近交也会加速繁殖群体间的遗传分化。样方种群在同一床层内具有短距离（2.4-3.6 m）的正自相关和明显的遗传渐变。这表明，即使种群密度大幅增加，基因流动也仅限于一个短范围。因此，大规模的传播，如空中传播的贡献很小，在温室基因流。
The fine-scale genetic structure ofTetranychus urticaeKoch was studied to estimate local gene flow within a rose tree habitat in a commercial greenhouse using seven microsatellite markers. Two beds of rose trees with different population densities were selected and 18 consecutive quadrats of 1.2 m length were sequentially established in each bed. Heterozygote deficiency was positive within quadrats, which was most likely a result of the Wahlund effect because the mites usually form small breeding colonies. Low population density and frequent inbreeding could also accelerate genetic differentiation among the breeding colonies. A short-range (2.4–3.6 m) positive autocorrelation and clear genetic cline among quadrat populations was detected within a bed. This suggests that gene flow was limited to a short range even if population density was substantially increased. Therefore, large-scale dispersal such as aerial dispersal contributed very little to gene flow in the greenhouse.