Abstract
Sequences of a part of the mitochondrial cytochrome oxidase subunit I (COI) gene were analyzed in four Japanese Panonychus species to determine their phylogenetic relationships. Neighbor-Joining and maximum likelihood analysis resulted in a high bootstrap support of the relationships within the genus Panonychus. In contrast with a previous study based on ribosomal DNA data, the COI phylogeny suggested that P. mori was more distantly related to P. citri than to P. ulmi. This study shows for the first time that P. osmanthi is closely related to P. citri. Intraspecific variation analysis shows that the genetic distance between two local populations of P. mori is higher than between P. citri and P. osmanthi.
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