International Journal of Acarology (2012) 38, 66-73

Bao-Jun Wang, Ming-Long Yuan, Dan-Dan Wei, Jin-Zhi Niu, Guo-Ye Nan and Jin-Jun Wang (2012)
High divergence levels of Panonychus citri populations on Rutaceae and Oleaceae as indicated by internal transcribed spacer 1 (ITS1) sequences
International Journal of Acarology 38 (1), 66-73
Abstract: The citrus red mite, Panonychus citri (McGregor) (Acari: Tetranychidae), has a worldwide distribution and is the most important citrus pest in many countries, including Japan, Spain and China. Apart from citrus, P. citri also feeds on other woody plants such as pear, peach and holly. To characterize the population genetic structure of citrus red mite in association with their host plants, the gene flow (Nm) and genetic differentiation among sympatric populations of P. citri (F _ST estimates) on different host plants were estimated using the ribosomal internal transcribed spacer 1 (ITS1) sequence. The results indicated that there were high levels of gene flow (Nm = infinite) among the populations from the same host genera and the same host family. Populations of P. citri displayed genetic differentiation and low levels of gene flow (Nm < 1) between the populations collected from Rutaceae and Oleaceae host plants. While the haplotype network presented a parallel pattern, there was no one central common haplotype. Pairwise F _ST indicated that in China, P. citri has differentiated into two groups, one of which was associated with sweet olive and the other with other host plants. The result of cytochrome oxidase subunit I analysis also supported this result, suggesting the possibility of sympatric host race formation in this species.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jin-Jun Wang

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Panonychus citri	Citrus (genus)