Abstract
We compared the random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) banding patterns obtained from four laboratory cultures representing three phytoseiid mite species (Typhlodromalus limonicus (Garman and McGregor), two cultures of Typhlodromalus manihoti (de Moraes) and Typhlodromalus tenuiscutus (McMurtry and de Moraes). The RAPD-PCR was conducted on the pooled DNA from five adult female mites. For each culture, three samples of five females were analysed with each of eight RAPD-PCR primers. Five of the eight primers could be used individually to distinguish the species. To quantify the within- and between-species variation, genetic distances were calculated based on the proportion of shared scorable bands. The within-species genetic distances (0.072-0.186) were much lower than the between-species genetic distances (0.407-0.656). We believe that this technique could be used effectively to identify other cryptic mite species.
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