Microsatellite markers reveal spatial genetic structure of Tetranychus urticae (Acari: Tetranychidae) populations along a latitudinal gradient in Europe
Microsatellite markers reveal spatial genetic structure of Tetranychus urticae (Acari: Tetranychidae) populations along a latitudinal gradient in Europe
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DOI：
10.1007/s10493-007-9068-z
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发表时间：
2007-04-01
影响因子：
2.2
通讯作者：
Navajas, Maria
中科院分区：
文献类型：
--
作者：
Carbonnelle, Sabine;Hance, Thierry;Navajas, Maria
沿着从法国南部到荷兰的南北欧横断面，对二斑叶螨种群的遗传结构进行了调查。在荨麻上的 6 个采样区采集了螨虫。 5 个位点的微卫星变异揭示了相当大的遗传变异，平均杂合度为 0.49。在分析的 18 个样本中，有 7 个群体发现了显着的杂合子缺陷，其中一个群体完全是单态性的。二斑叶螨种群表现出一定程度的遗传结构。首先，地区之间的遗传差异（F-ST 估计）对于所有比较都很重要。其次，分子方差分析 (AMOVA) 表明，局部性在解释等位基因频率方差方面存在影响，尽管较低 (9%)。地理距离是造成这种遗传结构的一个因素。讨论的结果与该物种的生物学特征和已知的迁徙模式有关。解决了相关农艺问题。
The genetic structure of populations of the two-spotted spider mite Tetranychus urticae was investigated along a south-north European transect spanning from southern France to The Netherlands. Mites were collected on Urtica dioica in 6 sampling zones. Microsatellite variation at 5 loci revealed considerable genetic variation with an average heterozygozity of 0.49. Significant heterozygote deficiency was found in 7 populations out of the 18 samples analyzed and one of them was completely monomorphic. Tetranychus urticae populations show some level of genetic structuring. First, genetic differentiation between localities (F-ST estimates) was significant for all comparisons. Second, the analysis of molecular variance, AMOVA, indicates that there is an effect, albeit low (9%), of the locality in accounting for allele frequency variance. Geographic distance emerges as a factor responsible for this genetic structure. The results are discussed in relation to the biological features of the species and the known patterns of migration. Related agronomical issues are addressed.