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Discrimination of Reproductive Forms of Thrips tabaci (Thysanoptera: Thripidae) by PCR With Sequence Specific Primers

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In agriculture, although it is important to identify species of pest insects, the morphological identification is often difficult. DNA genotyping is useful for the identification of species in morphologically indiscriminable species. Thrips tabaci (Lindeman) can be divided into two reproductive forms (arrhenotoky and thelytoky, each of which different in pesticide resistance) but morphological discrimination is not possible. Here, we establish a simple method to discriminate the strains based on their mitochondrial DNA sequences. Phylogenetic analysis including the T. tabaci and congeneric species provided ancestor sequences of each strain of T. tabaci. Based on the ancestor sequences, we developed a primer set that include strain specific primers on sense strand and common primer on anti sense strand. Using this primer set, the strains of 196 individuals of T. tabaci were successfully assigned to each of genotypic forms. As the phylogeny and ancestor sequences were based on worldwide samples, this method will work well on most populations around the world.

Keywords: PCR-SSP; Thrips tabaci; mitochondrial DNA; phylogeny; reproductive form

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/EC11320

Publication date: April 1, 2012

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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