Asexual reproduction occurs widely in plants and animals, particularly in insects. Aphid species usually reproduce by cyclic parthenogenesis, but many species include obligate asexual lineages. We recently showed that the leaf‐curl plum aphid, Brachycaudus helichrysi, actually encompasses two lineages, B . helichrysi H1 and H2. Ecological data suggest that these lineages have different life cycles. We conducted a large populat...