Genetic diversity in field and commercial populations of Orius strigicollis (Poppius) (Heteroptera

Six microsatellite markers were developed for Orius strigicollis (Poppius), and their characteristics were analyzed using seven field and two commercial populations. The markers showed enough polymorphism to be suitable to elucidate genetic diversity, although null alleles were found on two loci and three loci were sex-linked. No linkage disequilibrium was detected except for a pair of two sex-linked loci. Allele frequencies between sexes in each population were not different in field populations. No genetic differentiation was found among populations collected in southern Kyushu, suggesting that this species has a large gene pool in the field. Allelic richness was significantly smaller in commercial populations than in field ones, possibly due to bottleneck effects and genetic drifts during mass-production procedures.