Temporal variation in genetic structure of a colonising species: Aedes albopictus in the United States.
Temporal variation in genetic structure of a colonising species: Aedes albopictus in the United States.
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定植物种遗传结构的时间变化：美国的白纹伊蚊。
DOI：
10.1038/hdy.1990.34
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发表时间：
1990
期刊：
影响因子：
3.8
通讯作者：
Sprenger,D
中科院分区：
文献类型：
--
作者：
Kambhampati,S;Black4th,WC;Rai,KS;Sprenger,D
医学上重要的蚊子白纹伊蚊最近已在美国多个地区定居。对 17 个种群的 10 个酶位点等位基因频率的时间变化进行了为期三年的调查，以确定自定殖事件以来变化的程度和方向。所有人群中大多数基因座的等位基因频率均检测到显着但非定向的变化。在早期样本中以低频率检测到的一些等位基因在后续样本中未发现。等位基因频率的方差保持不变。至少在两个位置，平均杂合度有所增加，这可能是由于基因流的原因。群体内部和群体之间的遗传变异水平没有显着变化。本研究结果表明，Ae 的育种结构。无论是在殖民后不久，还是在新栖息地经过几代之后，美国的白纹伊蚊与本地栖息地的白纹伊蚊并没有太大差异。我们认为，大量的始祖种群、基因流动和快速的种群扩张可以解释伊蚊目前的育种结构。白纹伊蚊。
The medically important mosquito, Aedes albopictus, has recently become established in several locations within the United States. A three-year survey of temporal variation in allele frequencies at ten enzymatic loci in 17 populations was undertaken to determine the extent and direction of change since the colonisation event. Significant, but non-directional, changes were detected in allele frequencies at most of the loci in all populations. Some alleles detected at low frequencies in earlier samples were not found in subsequent samples. Variance of allele frequencies remained unchanged. In at least two locations, there was an increase in mean heterozygosity, perhaps because of gene flow. There was no significant change in the levels of genetic variation within and among populations. The results from this study indicate that the breeding structure of Ae. albopictus in the US did not differ substantially from that in a native habitat, either soon after colonisation or after several generations in the new habitat. We suggest that a large founder population, gene flow and a rapid population expansion could explain the present breeding structure of Ae. albopictus.