A clearer understanding of the structure of pest populations in newly invaded areas is a key step towards their effective management. Here, we use Drosophila suzukii as a model to highlight how populations from separate geographical regions differ in their genetic and phenotypic traits, including those associated with their invasiveness. New X-linked data indicate the presence of at most three D. suzukii genetic clusters in Europe, while North American populations are characterised by a larger genetic diversity. We found a likely new colonisation event from America to Italy and demonstrate that reference genomes from Italian and Californian populations lay in highly distant clusters. Comparative genomics indicate that these two genomes bear the traces of distinct evolutionary forces and are genetically distant, having diversified long ago in their native Asian range. Phenotypic studies further indicate that European and North American populations have differences in hatch rate, generation time, and parasitoid susceptibility. The observed genotypic and phenotypic differences likely represent a small fraction of the features unique to each of the two populations. The results provide some new insights towards both fundamental and management studies on invasive pests, particularly when findings are transferred across populations found in different geographical regions

Rota Stabelli, O.; Ometto, L.; Tait, G.; Ghirotto, S.; Senza cognome, R.K.; Drago, F.; González, J.; Walton, V.M.; Anfora, G.; Rossi Stacconi, M.V. (2020). Distinct genotypes and phenotypes in European and American strains of Drosophila suzukii: implications for biology and management of an invasive organism. JOURNAL OF PEST SCIENCE, 93: 77-89. doi: 10.1007/s10340-019-01172-y handle: http://hdl.handle.net/10449/58300

Distinct genotypes and phenotypes in European and American strains of Drosophila suzukii: implications for biology and management of an invasive organism

Rota Stabelli, O.
Primo
;
Ometto, L.;Tait, G.;Senza cognome, Rupinder Kaur;Drago, F.;Anfora, G.;Rossi Stacconi, M. V.
Ultimo
2020-01-01

Abstract

A clearer understanding of the structure of pest populations in newly invaded areas is a key step towards their effective management. Here, we use Drosophila suzukii as a model to highlight how populations from separate geographical regions differ in their genetic and phenotypic traits, including those associated with their invasiveness. New X-linked data indicate the presence of at most three D. suzukii genetic clusters in Europe, while North American populations are characterised by a larger genetic diversity. We found a likely new colonisation event from America to Italy and demonstrate that reference genomes from Italian and Californian populations lay in highly distant clusters. Comparative genomics indicate that these two genomes bear the traces of distinct evolutionary forces and are genetically distant, having diversified long ago in their native Asian range. Phenotypic studies further indicate that European and North American populations have differences in hatch rate, generation time, and parasitoid susceptibility. The observed genotypic and phenotypic differences likely represent a small fraction of the features unique to each of the two populations. The results provide some new insights towards both fundamental and management studies on invasive pests, particularly when findings are transferred across populations found in different geographical regions
Invasive insect
Comparative genomics
Population genetics
Parasitoid
Life table
Intraspecifc variations
Drosophila suzukii
Settore AGR/11 - ENTOMOLOGIA GENERALE E APPLICATA
2020
Rota Stabelli, O.; Ometto, L.; Tait, G.; Ghirotto, S.; Senza cognome, R.K.; Drago, F.; González, J.; Walton, V.M.; Anfora, G.; Rossi Stacconi, M.V. (2020). Distinct genotypes and phenotypes in European and American strains of Drosophila suzukii: implications for biology and management of an invasive organism. JOURNAL OF PEST SCIENCE, 93: 77-89. doi: 10.1007/s10340-019-01172-y handle: http://hdl.handle.net/10449/58300
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