Cold tolerance in obligate and cyclical parthenogens of the peach‐potato aphid, Myzus persicae
Cold tolerance in obligate and cyclical parthenogens of the peach‐potato aphid, Myzus persicae
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桃蚜专性和周期性单性生殖的耐冷性
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
C. Vorburger
中科院分区：
文献类型：
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作者：
C. Vorburger
摘要。1。许多蚜虫形成周期性和专性孤雌生殖的混合种群。这是令人困惑的，因为在其他条件相同的情况下，由于两倍的性成本，专一性孤雌应该胜过周期性孤雌。然而，周期性孤雌生殖在秋季产生抗冻、滞育的卵，而专性孤雌生殖则在冬季处于活跃阶段。因此，抗冻性代表了冬季温度介导的有性繁殖的短期优势，这可能促进这种共存。
Abstract. 1. Many aphids form mixed populations of cyclical and obligate parthenogens. This is puzzling, because all else being equal, obligate parthenogens should outcompete cyclical parthenogens due to the two‐fold cost of sex. Yet cyclical parthenogens produce frost‐resistant, diapausing eggs in autumn, while obligate parthenogens spend the winter as active stages. Frost resistance thus represents a short‐term advantage to sexual reproduction mediated by winter temperatures, which may promote this coexistence.