Genome-wide sequence data show no evidence of hybridization and introgression among pollinator wasps associated with a community of Panamanian strangler figs

The specificity of pollinator host choice influences opportunities for reproductive isolation in their host plants. Similarly, host plants can influence opportunities for reproductive isolation in their pollinators. For example, in the fig and fig wasp mutualism, offspring of fig pollinator wasps mate inside the inflorescence that the mothers pollinate. Although often host specific, multiple fig pollinator species are sometimes associated with the same fig species, potentially enabling hybridization between wasp species. Here we study the 19 pollinator species (Pegoscapus spp.) associated with an entire community of 16 Panamanian strangler fig species (Ficus subgenus Urostigma, section Americanae) to determine whether the previously documented history of pollinator host switching and current host sharing predicts genetic admixture among the pollinator species, as has been observed in their host figs. Specifically, we use genome-wide ultraconserved element (UCE) loci to estimate phylogen...传粉者的宿主选择特异性，会影响其宿主植物的生殖隔离机会；反之，宿主植物同样也会对传粉者的生殖隔离机会产生影响。以榕属植物与榕小蜂的互利共生体系为例，榕小蜂传粉者的后代会在母代所传粉的花序内完成交配。尽管多数传粉者具有宿主专一性，但有时多种榕小蜂传粉者会与同一种榕树相关联，这为不同蜂种间的杂交提供了潜在可能。本研究聚焦于巴拿马地区16种绞榕（Ficus subgenus Urostigma, section Americanae）的整个群落所关联的19种传粉者（Pegoscapus属物种），旨在验证此前所记录的传粉者宿主切换历史与当前宿主共享现象，是否正如在宿主榕树中所观察到的那样，预示着传粉者物种间存在遗传渐渗。具体而言，我们将利用全基因组超保守元件（UCE）位点来估算系统发育。