Host plant associations in the spider mite Tetranychus urticae (Acari: Tetranychidae): insights from molecular phylogeography

摘要: This article integrates studies on the genetic variation of T. urticae populations and interspecific several tetranychid species. It aims at obtaining insights into roles historical, geographical ecological factors in partitioning Two types molecular markers were used to determine whether patterns mites inhabiting different host plants can shed light existence plant associations. The ribosomal sequences second internal transcribed spacer (ITS2), which evolves through concerted evolution, are good indicators long-term isolation between reveal exceptional homogeneity a worldwide sampling urticae. mitochondrial cytochrome oxidase I (COI) do not disclose old divergences related this mite but rather suggest recent geographic colonization Allozyme fine scale gives some evidence associations case citrus trees. However, if any divergence exists, it probably prevails local only should be enough revealed by phylogenetic analysis COI sequences. phyletic constraint evolution feeding specificity family Tetranychidae is investigated based results provide support for hypothesis that an evolutionary trend towards polyphagy has occurred family. Overall, seems major characteristic its high potential. Polyphagy enhanced successful spread may have led connectivity worldwide.