Utah State University, Department of Biology, Utah State University, Logan, UT 84322, USA.
Mol Phylogenet Evol. 2011 Aug;60(2):219-27. doi: 10.1016/j.ympev.2011.04.014. Epub 2011 Apr 24.
Melittobia, a polyphagous pupal parasitoid of many solitary bees and wasps, has a complex courtship display, the evolutionary history of which is poorly understood. The current phylogeny of this genus suggests the complexity of the courtship has increased over time. We test this hypothesis using Bayesian and Maximum likelihood techniques to construct a molecular phylogeny of Melittobia-the first for this genus using modern techniques--using two intergenic regions (Internal Transcribed Spacer regions 1 and 2) and Cytochrome Oxidase 1 (CO1), and reconstruct the ancestral state of each major node in the phylogeny for five behaviors coincidental to major shifts in display complexity. We show that species-groups identified solely on behavioral characters are reliable, although the relationships among groups are different than those previously hypothesized. We also show that behaviors traditionally used in the courtship studies do not support a hypothesis of increasing display complexity over time.
金小蜂，一种多种独居蜂和胡蜂的幼虫多寄生蜂，具有复杂的求偶展示行为，其进化历史知之甚少。本属的现有系统发育表明，求偶行为的复杂性随着时间的推移而增加。我们使用贝叶斯和最大似然技术来检验这一假设，构建了金小蜂的分子系统发育，这是该属首次使用现代技术，使用两个内含子区域（1 号和 2 号内部转录间隔区）和细胞色素氧化酶 1（CO1），并为系统发育中五个与展示复杂性重大转变同时发生的主要行为的每个主要节点重建了祖先状态。我们表明，仅根据行为特征确定的物种群是可靠的，尽管群体之间的关系与之前假设的不同。我们还表明，传统上用于求偶研究的行为并不能支持随着时间的推移展示复杂性增加的假设。
