Differences in extent of genetic introgression between sympatric Culex pipiens and Culex quinquefasciatus (Diptera: Culicidae) in California and South Africa
Differences in extent of genetic introgression between sympatric Culex pipiens and Culex quinquefasciatus (Diptera: Culicidae) in California and South Africa
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DOI：
10.1603/0022-2585-40.1.36
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发表时间：
2003-01-01
影响因子：
2.1
通讯作者：
Coetzee, M
中科院分区：
文献类型：
--
作者：
Cornel, AJ;McAbee, RD;Coetzee, M
通过比较尖音库蚊种群的5个形态特征、12个酶电泳图谱和Wolbachia pipientis感染率，对尖音库蚊种群进行了分析。在加州和南非的复杂。在南非，男性阴茎体DV/D比，男性下颚须指数，分支的虹吸刚毛，酶位点Mdhp-1，和W pipientis感染率被证明是高度诊断分离Cidex quinquefasciatus从Cx。pipiens表型在约翰内斯堡，同域成员的Cx。在Ao、6-Pgdh、Mdh-2和Pgm等酶位点上观察到显著的Wahlund效应。在加州，所有的Cx。pipiens复合体在所有多态性位点上均处于哈代温伯格平衡。此外，在加州，所有人群的尖音线虫感染率相似，形态上也相同（除了极北和极南的DV/D比值）。这些发现表明，在南非，Cx。pipiens和Cx. quinquefasciatus仍然是遗传上不同的种群，并表现为独立的物种。相反，在加州，Cx之间存在相当大的遗传渐渗。pipiens和Cx. quinquefasciatus，它们表现为一个单一的物种。
Comparisons of five morphological characters, 12 enzyme electrophoresis profiles, and Wolbachia pipientis infection rates were used to characterize populations of members of the Culex pipiens L. complex in California and South Africa. In South Africa, male phallosome DV/D ratio, male maxillary palp index, branching of siphonal seta la, the enzyme locus Mdhp-1, and W pipientis infection rates proved highly diagnostic for separating Cidex quinquefasciatus from Cx. pipiens phenotypes. In Johannesburg, where sympatric members of the Cx. pipiens complex were analyzed as one population, a significant Wahlund Effect was observed in the enzyme loci such as Ao, 6-Pgdh, Mdh-2, and Pgm. In California, all populations of the Cx. pipiens complex were in Hardy Weinberg equilibrium at all polymorphic enzyme loci examined. Additionally, in California, all populations had similar W pipientis infection rates and appeared morphologically identical (except for DV/D ratio, in extreme north and south). These findings indicate that in South Africa, Cx. pipiens and Cx. quinquefasciatus remain as genetically distinct populations and behave as separate species. Conversely, in California, there is considerable genetic introgression between Cx. pipiens and Cx. quinquefasciatus, and they behave as a single species.