Queen-worker conflict over male production and the sex ratio in a facultatively polyandrous bumblebee, Bombus hypnorum:: the consequences of nest usurpation
Queen-worker conflict over male production and the sex ratio in a facultatively polyandrous bumblebee, Bombus hypnorum:: the consequences of nest usurpation
复制标题
DOI：
10.1046/j.0962-1083
复制
发表时间：
2001-10-01
影响因子：
4.9
通讯作者：
Tengö, J
中科院分区：
文献类型：
--
作者：
Paxton, RJ;Thorén, PA;Tengö, J
从理论上讲，社会性膜翅目同巢动物之间的进化冲突很可能出现在雄性繁殖和性别比例方面。对这些冲突的分析已成为研究亲缘选择在塑造膜翅目群体社会特征中的作用的一个重要焦点。我们利用微卫星分析了一种社会性膜翅目动物（原始社会性和单性的大黄蜂 Bombus hypnorum）的巢穴，以评估这些冲突。在我们的 14 个研究群体中，B. hypnorum 蜂王交配一到六次（算术平均值 2.5）。雄性通常占主导地位，是大多数后代的父亲，因此有效交配次数要低得多（1-3.13；调和平均值 1.26）。此外，微卫星分析还可以在大约一半的殖民地中检测到外星工蚁，这些工蚁不可能是蚁后的后代。同一殖民地的外星工人可能是姐妹。一妻多夫制和外来工人导致群体之间的社会遗传组织存在很大差异。遗传数据与以下观点一致：所有雄性（n = 233 名检查者）都是由蜂群的蜂王产生的。因此，雄性亲子关系与群体的社会遗传组织无关，这表明是蜂后，而不是工蜂，控制着雄性卵的产下。人口性别比（鲜重投资比）女性偏弱。没有检测到群体水平适应性性别比例偏差的证据。
Evolutionary conflicts among social hymenopteran nestmates are theoretically likely to arise over the production of males and the sex ratio. Analysis of these conflicts has become an important focus of research into the role of kin selection in shaping social traits of hymenopteran colonies. We employ microsatellite analysis of nestmates of one social hymenopteran, the primitively eusocial and monogynous bumblebee Bombus hypnorum, to evaluate these conflicts. In our 14 study colonies, B. hypnorum queens mated between one and six times (arithmetic mean 2.5). One male generally predominated, fathering most of the offspring, thus the effective number of matings was substantially lower (1-3.13; harmonic mean 1.26). In addition, microsatellite analysis allowed the detection of alien workers, those who could not have been the offspring of the queen, in approximately half the colonies. Alien workers within the same colony were probably sisters. Polyandry and alien workers resulted in high variation among colonies in their sociogenetic organization. Genetic data were consistent with the view that all males (n = 233 examined) were produced by a colony's queen. Male parentage was therefore independent of the sociogenetic organization of the colony, suggesting that the queen, and not the workers, was in control of the laying of male-destined eggs. The population-wide sex ratio (fresh weight investment ratio) was weakly female biased. No evidence for colony-level adaptive sex ratio biasing could be detected.