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.
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.
- Myzus persicae
- chromosomal rearrangement
- gene amplification