Queen-controlled sex ratios and worker reproduction in the bumble bee Bombus hypnorum, as revealed by microsatellites
Queen-controlled sex ratios and worker reproduction in the bumble bee Bombus hypnorum, as revealed by microsatellites
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DOI：
10.1046/j.1365-294x.2003.01840.x
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发表时间：
2003-06-01
影响因子：
4.9
通讯作者：
Schmid-Hempel, P
中科院分区：
文献类型：
--
作者：
Brown, MJF;Schmid-Hempel, R;Schmid-Hempel, P
社会性昆虫群体为研究不同遗传利益群体之间的冲突提供了模型系统。因此，他们提供了包容性适应理论的最佳测试。然而，关于哪一方的利益，这些冲突得到解决，仍然有很多未知数，部分原因是最近才出现的分子工具，需要检查这些冲突的结果。社会性昆虫群体中的两个关键冲突是过度控制生殖性比和雄性后代的产生。大多数研究只研究了其中的一种冲突，但实际上它们是同时发生的，并且可能相互影响。利用微卫星分析，结果的冲突，性别比例和雄性生产的大黄蜂，熊蜂hypnorum。对10个群体中的每一个群体的母蚁后、它们的配偶和雄性确定基因型。与其他关于该物种交配频率的报道相反，所有的蚁后都是单独交配的。种群性别比例与女王控制一致，表明女王正在赢得这场冲突。相比之下，工蜂生产的雄蜂数量占到了蚁后右翼殖民地的20%以上，这表明它们在竞争雄蜂生产方面更有效率。结合这些结果与以前的工作，这表明，工人繁殖是一个不稳定的性状，可能只会对皇后健身小成本。
Social insect colonies provide model systems for the examination of conflicts among parties with different genetic interests. As such, they have provided the best tests of inclusive fitness theory. However, much remains unknown about in which party's favour such conflicts are resolved, partly as a result of the only recent advent of the molecular tools needed to examine the outcome of these conflicts. Two key conflicts in social insect colonies are over control of the reproductive sex ratio and the production of male offspring. Most studies have examined only one of these conflicts but in reality they occur in tandem and may influence each other. Using microsatellite analyses, the outcome of conflict over sex ratios and male production was examined in the bumble bee, Bombus hypnorum . The genotypes were determined for mother queens, their mates and males for each of 10 colonies. In contrast to other reports of mating frequency in this species, all of the queens were singly mated. The population sex ratio was consistent with queen control, suggesting that queens are winning this conflict. In contrast, workers produced over 20% of all males in queen-right colonies, suggesting that they are more effective in competing over male-production. Combining these results with previous work, it is suggested that worker reproduction is a labile trait that may well impose only small costs on queen fitness.