Urbanelli S, Silvestrini F, Sabatinelli G, Raveloarifera F, Petrarca V, Bullini L
Department of Genetics and Molecular Biology, University of Rome La Sapienza, Italy.
J Med Entomol. 1995 Nov;32(6):778-86. doi: 10.1093/jmedent/32.6.778.
Morphological analysis of phallosome and multilocus electrophoresis were used to characterize populations of the Culex pipiens L. complex from Madagascar. Samples phenotypically and genetically corresponding to Cx. p. quinquefasciatus Say were found on the east and west coasts, whereas, on the high plateau, 1 sample was composed mostly of phenotypical Cx. p. pipiens L., genetically introgressed with quinquefasciatus at some loci (Hbdh, Aat-2, and Hk-1). A hybrid zone between the 2 taxa was detected on the plateau on a genetic basis, whereas at the morphological level a predominance of Cx. p. quinquefasciatus specimens and deficit of intermediates was observed. Accordingly, morphological analysis failed to describe satisfactorily the hybridization phenomena. Despite the high level of gene exchange, a complete mixing of the 2 gene pools apparently does not occur, possibly because of differential selective pressures in the climatically heterogeneous environment of the Madagascar plateau.
运用阳茎形态分析和多位点电泳技术对来自马达加斯加的尖音库蚊复合组种群进行特征描述。在东海岸和西海岸发现了表型和基因上与致倦库蚊相符的样本，而在高原地区，有1个样本主要由表型上的尖音库蚊组成，在某些基因座（Hbdh、Aat - 2和Hk - 1）上与致倦库蚊存在基因渐渗。在高原地区基于遗传基础检测到了这两个分类单元之间的杂交带，而在形态学水平上，观察到致倦库蚊标本占优势且中间类型缺乏。因此，形态学分析未能令人满意地描述杂交现象。尽管基因交换水平很高，但这两个基因库显然并未完全混合，这可能是由于马达加斯加高原气候异质环境中的差异选择压力所致。
