Culex pipiens in London Underground tunnels:: differentiation between surface and subterranean populations

被引:158
作者
Byrne, K [1 ]
Nichols, RA [1 ]
机构
[1] Univ London Queen Mary & Westfield Coll, London E1 4NS, England
基金
英国生物技术与生命科学研究理事会;
关键词
Culex pipiens; population structure; reproductive isolation;
D O I
10.1038/sj.hdy.6884120
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 [生物信息与计算生物学]; 0713 [生态学];
摘要
Genetic variation was quantified between surface-dwelling populations of Culex pipiens and the so-called molestus form found in the London Underground (the Underground) railway system. The molestus form is a commercially important biting nuisance and in the southern part of its range is also a disease vector. The surface and subterranean populations were genetically distinct, with no evidence of gene flow between closely adjacent populations of the different forms, whereas there was little differentiation between the different populations of each form. The substantially reduced heterozygosity in the Underground populations and the allelic composition suggest that colonization of the Underground has occurred once or very few times. Breeding experiments show compatibility between the Underground populations but not with those breeding above ground. There is evidence of greater gene flow and a mixing of molestus and pipiens traits in the south of the species range. This paper considers the processes that may allow establishment of reproductive isolation in the north of the species range but not in the south.
引用
收藏
页码:7 / 15
页数:9
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