Stevens J R, Wall R, Wells J D
School of Biological Sciences, University of Exeter, Prince of Wales Road, Exeter EX4 4PS, UK.
Insect Mol Biol. 2002 Apr;11(2):141-8. doi: 10.1046/j.1365-2583.2002.00318.x.
Complementary nuclear (28S rRNA) and mitochondrial (COI + II) gene markers were sequenced from the blowflies, Lucilia cuprina and Lucilia sericata, from Europe, Africa, North America, Australasia and Hawaii. Populations of the two species were phylogenetically distinct at both genes, with one exception. Hawaiian L. cuprina possessed typical L. cuprina-type rRNA, but had L. sericata-type mitochondrial (COI + II) sequences. An explanation for this pattern is that Hawaiian flies are hybrids and comparison of observed levels of sequence divergence to possible introduction events, e.g. Polynesian colonization, suggests that Hawaiian L. cuprina may be evolving rapidly. Moreover, the monophyly of these flies also suggests that the L. sericata mtDNA haplotype was apparently fixed in Hawaiian L. cuprina by lineage sorting, indicating a population bottleneck in the evolutionary history of these island flies.
对来自欧洲、非洲、北美洲、澳大拉西亚和夏威夷的丽蝇科昆虫铜绿蝇（Lucilia cuprina）和丝光绿蝇（Lucilia sericata）的互补核基因（28S rRNA）和线粒体基因（COI + II）标记进行了测序。这两个物种的种群在这两个基因上在系统发育上都是不同的，但有一个例外。夏威夷的铜绿蝇拥有典型的铜绿蝇型rRNA，但具有丝光绿蝇型线粒体（COI + II）序列。对此模式的一种解释是，夏威夷的苍蝇是杂交种，将观察到的序列差异水平与可能的引入事件（例如波利尼西亚殖民）进行比较表明，夏威夷铜绿蝇可能正在快速进化。此外，这些苍蝇的单系性还表明，丝光绿蝇的线粒体DNA单倍型显然通过谱系分选在夏威夷铜绿蝇中固定下来，这表明这些岛屿苍蝇的进化历史中存在种群瓶颈。
