Animals with recent shared ancestry frequently adapt in parallel to new but similar habitats, a process often underlined by repeated selection of the same genes. Yet, in contrast, few examples have demonstrated the significance of gene reuse in colonization of multiple disparate habitats. By analyzing 343 genomes of the widespread Asian honeybee, Apis cerana, we showed that multiple peripheral subspecies radiated from a central ancestral population and adapted independently to diverse habitats. We found strong evidence of gene reuse in the Leucokinin receptor (Lkr), which was repeatedly selected in almost all peripheral subspecies. Differential expression and RNA interference knockdown revealed the role of Lkr in influencing foraging labor division, suggesting that Lkr facilitates collective tendency for pollen/nectar collection as an adaptation to floral changes. Our results suggest that honeybees may accommodate diverse floral shifts during rapid radiation through fine-tuning individual foraging tendency, a seemingly complex process accomplished by gene reuse.
|State||Published - Dec 2020|
Bibliographical noteFunding Information:
The work was supported by the Program of Ministry of Science and Technology of China (2018FY100403), National Special Support Program for High-level Talents (Ten-Thousand Talents Program), National Natural Science Foundation of China (No. 31772493), and funding from the Beijing Advanced Innovation Center for Food Nutrition and Human Health through China Agricultural University grant to Xin Zhou. Sample collection was also supported by the NSF of China (no. 31470123) and Jilin Science and Technology Program (no. 20030561) to X.L. S.H.P. is thankful to the National Mission on Himalayan Studies (NMHS)–Almora, Ministry of Environment, Forest and Climate Change, Government of India, for providing financial assistance with reference no. GBPNI/NMHS-2017-18/MG-12 dated 26 February 2018.
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