Lewis Rebecca L, Beckenbach Andrew T, Mooers Arne Ø
Simon Fraser University, Burnaby, BC, Canada.
Mol Phylogenet Evol. 2005 Oct;37(1):15-24. doi: 10.1016/j.ympev.2005.02.018.
The relationships among the majority of the subgroups in the Drosophila melanogaster species group remain unresolved. We present a 2223basepair dataset for mitochondrial cytochrome oxidase I and cytochrome oxidase II for 43 species (including new data from 11 species), sampled to include the major subgroups. After a brief review of competing hypotheses for the ananassae, montium, suzukii, and takahashii subgroups, we combine the two genes based on a new use of the SH test and present KH and SH likelihood comparisons (Kishino and Hasegawa, 1989. J. Mol. Evol. 29, 170-179; Shimodaira and Hasegawa, 1999) to test the monophyly and placement of these subgroups within the larger species group. Although we find insignificant differences between the two suggested placements for the ananassae subgroup, the ananassae is sister to the rest of the subgroups in the melanogaster species group in every investigation. For the takahashii subgroup, although we cannot reject monophyly, the species are so closely related to the suzukii subgroup for these data that the two subgroups often form one clade. Finally, we present a Bayesian estimate of the phylogeny for both genes combined, utilizing a recently published method that allows for different models of evolution for different sites.
黑腹果蝇物种组中大多数亚组之间的关系仍未得到解决。我们提供了一个包含43个物种（包括11个物种的新数据）的线粒体细胞色素氧化酶I和细胞色素氧化酶II的2223碱基对数据集，这些物种的采样涵盖了主要亚组。在简要回顾了关于阿纳纳萨亚组、蒙蒂亚亚组、铃木亚组和高桥亚组的相互竞争的假说之后，我们基于SH检验的新应用将这两个基因合并，并进行了KH和SH似然性比较（Kishino和Hasegawa，1989年。《分子进化杂志》29卷，第170 - 179页；Shimodaira和Hasegawa，1999年），以检验这些亚组在更大的物种组中的单系性和位置。尽管我们发现阿纳纳萨亚组的两种建议位置之间差异不显著，但在每次调查中，阿纳纳萨亚组都是黑腹果蝇物种组中其他亚组的姐妹群。对于高桥亚组，尽管我们不能拒绝其单系性，但就这些数据而言，该亚组的物种与铃木亚组关系非常密切，以至于这两个亚组常常形成一个进化枝。最后，我们利用一种最近发表的方法，对合并后的两个基因进行了贝叶斯系统发育估计，该方法允许不同位点采用不同的进化模型。
