His research interests concerns the evolutionary genetics of sexual isolation in insect species, and other approaches to the study of speciation. Research projects involve analyses of the inheritance and geographic variation of courtship signals and preferences of Drosophila and crickets. Also, comparative genomic analyses of various species.

Parker, DJ, Zaborowska, J, Ritchie, MG & Vahed, K 2017, 'Paternity analysis of wild caught females shows the sperm package size and placement influence fertilisation success in the bushcricket Pholidoptera griseoaptera' Molecular Ecology. Vigoder, FM, Parker, DJ, Cook, N, Tournière, O, Sneddon, T & Ritchie, MG 2016, 'Inducing cold-sensitivity in the frigophilic fly Drosophila montana by RNAi' PLoS One, vol 11, no. 11, e0165724. DOI: 10.1371/journal.pone.0165724 Debelle, A, Ritchie, MG & Snook, RR 2016, 'Sexual selection and assortative mating: an experimental test' Journal of Evolutionary Biology, vol 29, no. 7, pp. 1307-1316. DOI: 10.1111/jeb.12855 Diao, W, Mousset, M, Horsburgh, GJ, Vermeulen, CJ, Johannes, F, van de Zande, L, Ritchie, MG, Schmitt, T & Beukeboom, LW 2016, 'Quantitative trait locus analysis of mating behavior and male sex pheromones in Nasonia wasps' G3: Genes, Genomes, Genetics, vol 6, no. 6, pp. 1549-1562. DOI: 10.1534/g3.116.029074 Parker, DJ, Ritchie, MG & Kankare, M 2016, 'Preparing for winter: the transcriptomic response associated with different day lengths in Drosophila montana' G3: Genes, Genomes, Genetics, vol 6, no. 5, pp. 1373-1381. DOI: 10.1534/g3.116.027870