THE IMPORTANCE OF CYTOPLASMIC MALE KILLING ELEMENTS IN NATURAL-POPULATIONS OF THE 2 SPOT LADYBIRD, ADALIA-BIPUNCTATA (LINNAEUS) (COLEOPTERA, COCCINELLIDAE)
THE IMPORTANCE OF CYTOPLASMIC MALE KILLING ELEMENTS IN NATURAL-POPULATIONS OF THE 2 SPOT LADYBIRD, ADALIA-BIPUNCTATA (LINNAEUS) (COLEOPTERA, COCCINELLIDAE)
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DOI：
10.1111/j.1095-8312.1993.tb00898.x
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发表时间：
1993-06-01
影响因子：
1.9
通讯作者：
WALKER, LE
中科院分区：
文献类型：
--
作者：
HURST, GDD;MAJERUS, MEN;WALKER, LE
双斑瓢虫是一种多态的细胞质遗传因子，在胚胎发生期间通过影响雄性后代的死亡来产生偏向雌性的性别比。在剑桥人群中对这种元素的水平进行了评估。在接受测试的82只雌性中，有6只显示出偏向女性的性别比例和较低的卵孵化率，这与这种元素的存在相一致。通过收集剑桥地区的蛹来评估种群性别比。人口性别比为1.15：1，偏向女性，与1：1有显著差异，与基于人口性别比要素观测水平的模型的预测一致。
Adalia bipunctata, the two spot ladybird, is polymorphic for a cytoplasmically inherited element which produces female-biased sex ratios by effecting the death of male offspring during embryogenesis. The levels of this element were assessed in Cambridge populations. Six out of 82 females tested showed both a female-biased sex ratio and low egg hatch rates consistent with the presence of this element. Population sex ratios were assessed by collecting pupae from the Cambridge area. The population sex ratio was found to be 1.15: 1, female biased, significantly different from 1:1, and consistent with predictions based on a model incorporating the observed level of the sex ratio element in the population.