Morales-Hojas Ramiro, Vieira Cristina P, Vieira Jorge
Molecular Evolution Laboratory, IBMC, University of Porto, Rua do Campo Alegre 823, 4150-180, Porto, Portugal.
J Mol Evol. 2006 Aug;63(2):262-73. doi: 10.1007/s00239-005-0213-1. Epub 2006 Jul 7.
We have used phylogenetic techniques to study the evolutionary history of the Penelope transposable element in the Drosophila virilis species group. Two divergent types of Penelope have been detected, one previously described, clade I, and a new one which we have termed clade III. The phylogeny of some copies of the Penelope clade I element was partially consistent with the species phylogeny of the D. montana subphylad, suggesting cospeciation and allowing the estimation of the evolutionary rate of Penelope. Divergence times of elements found in different species are younger than the age of the species, suggesting horizontal transfer events.
我们运用系统发育技术研究了果蝇属（Drosophila virilis）物种组中佩内洛普转座元件（Penelope transposable element）的进化史。已检测到两种不同类型的佩内洛普元件，一种是先前描述过的I类，另一种是我们命名的III类。I类佩内洛普元件的一些拷贝的系统发育与蒙大拿果蝇亚分支（D. montana subphylad）的物种系统发育部分一致，表明共同物种形成，并使得能够估计佩内洛普元件的进化速率。在不同物种中发现的元件的分歧时间比物种的年龄要小，这表明存在水平转移事件。
