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Rapid response to selection for increased esterase activity on small populations of an apomictic clone of Myzus persicae

Abstract

It is generally thought that apomictic asexual reproduction produces offspring identical to the parent. In this paper we report changes that occur within a generation by selection on less than 25 offspring of an atypical strain of the aphid Myzus persicae starting from a single parthenogenetic mother. These changes consist of variations in the amount of a particular esterase (E4). The amount of this enzyme has already been shown to be correlated with levels of resistance to insecticides in different strains of this aphid1, and it has also been shown that E4 binds and hydrolyses the activated form of the insecticide parathion2. Recombination between homologous chromosomes has been eliminated as the source of variation and it appears that gene amplification might be one explanation of this phenomenon. It is conceivable that this phenomenon is associated with rapid evolutionary events such as the evolution of resistance to insecticides.

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Bunting, S., Van Emden, H. Rapid response to selection for increased esterase activity on small populations of an apomictic clone of Myzus persicae. Nature 285, 502–503 (1980). https://doi.org/10.1038/285502a0

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