西方蜜蜂三次走出亚洲及其适应性辐射

Dogantzis Kathleen A, Tiwari Tanushree, Conflitti Ida M, Dey Alivia, Patch Harland M, Muli Elliud M, Garnery Lionel, Whitfield Charles W, Stolle Eckart, Alqarni Abdulaziz S, Allsopp Michael H, Zayed Amro

Department of Biology, York University, 4700 Keele Street, Toronto, M3J 1P3 Ontario, Canada.

Department of Entomology, The Pennsylvania State University, State College, PA, USA.

Sci Adv. 2021 Dec 3;7(49):eabj2151. doi: 10.1126/sciadv.abj2151.

The origin of the western honey bee has been intensely debated. Addressing this knowledge gap is essential for understanding the evolution and genetics of one of the world’s most important pollinators. By analyzing 251 genomes from 18 native subspecies, we found support for an Asian origin of honey bees with at least three expansions leading to African and European lineages. The adaptive radiation of honey bees involved selection on a few genomic “hotspots.” We found 145 genes with independent signatures of selection across all bee lineages, and these genes were highly associated with worker traits. Our results indicate that a core set of genes associated with worker and colony traits facilitated the adaptive radiation of honey bees across their vast distribution.

西方蜜蜂的起源一直存在激烈争论。填补这一知识空白对于理解世界上最重要的传粉者之一的进化和遗传学至关重要。通过分析来自18个本地亚种的251个基因组，我们发现支持蜜蜂起源于亚洲，至少有三次扩张导致了非洲和欧洲谱系。蜜蜂的适应性辐射涉及对一些基因组“热点”的选择。我们在所有蜜蜂谱系中发现了145个具有独立选择特征的基因，这些基因与工蜂特征高度相关。我们的结果表明，一组与工蜂和蜂群特征相关的核心基因促进了蜜蜂在其广泛分布范围内的适应性辐射。