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A1-3 chromosomal translocations in Italian populations of the peach potato aphid Myzus persicae (Sulzer) not linked to esterase-based insecticide resistance

  • Marco Rivi (a1), Valentina Monti (a1), Emanuele Mazzoni (a2), Stefano Cassanelli (a1), Michela Panini (a2), Matteo Anaclerio (a2), Manuela Cigolini (a2), Bruna Corradetti (a3), Davide Bizzaro (a3), Mauro Mandrioli (a1) and Gian Carlo Manicardi (a1)...


Esterase-based resistance in the peach-potato aphid, Myzus persicae (Sulzer), is generally due to one of two alternative amplified carboxylesterase genes, E4 or FE4 (fast E4). The E4 amplified form is distributed worldwide and it is correlated with a particular translocation between autosomes 1 and 3, whereas the FE4 form, which has hitherto not been found to be associated with chromosomal rearrangements, is typical of the Mediterranean regions. In this study, we present for the first time cytogenetic and molecular data on some M. persicae parthenogenetic lineages, which clearly show a chromosomal A1-3 translocation associated with esterase FE4 genes and unrelated to high levels of esterase-based resistance.


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