Host plants usually play a crucial role in the first step of speciation, leading to host-associated differentiation (HAD) among populations that use different host plants. Previous studies of eriophyoid mite species have revealed HAD using morphometric and molecular methods. In the present study, we tested the hypothesis that HAD occurred among different populations of the pink tea mite, Acaphylla theae and the purple tea mite, Calacarus carinatus from three tea-producing areas of China. These tea-producing areas grow recently radiated varieties of tea. Therefore, diversification within these phytophagous mites was expected. However, using a K2P comparison, calculation of pairwise FST, network analyses and AMOVA based on mitochondrial and nuclear markers, no association between genetic diversity and host plant species was detected. Moreover, a very low level of haplotype and nucleotide diversity and a lack of geographical structure were found. The absence of genetic differentiation among host-associated populations suggests that these two species are real generalists of different varieties of tea. The limited genetic diversity among the populations of these two species can be attributed to their recent colonization of tea, and to their passive spread by frequent human commercial activities.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 19 • No. 2