Convergent and complementary selection shaped gains and losses of eusociality in sweat bees

 

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Bibliografiska uppgifter
Författarna: Jones, Beryl M., Rubin, Benjamin E. R., Dudchenko, Olga, Kingwell, Callum J., Traniello, Ian M., Wang, Z. Yan, Kapheim, Karen M., Wyman, Eli S., Adastra, Per A., Liu, Weijie, Parsons, Lance R., Jackson, S. RaElle, Goodwin, Katharine, Davidson, Shawn M., McBride, Matthew J., Webb, Andrew E., Omufwoko, Kennedy S., Van Dorp, Nikki, Fernández Otárola, Mauricio, Pham, Melanie, Omer, Arina D., Weisz, David, Schraiber, Joshua, Villanea, Fernando, Wcislo, William T., Paxton, Robert J., Hunt, Brendan G., Lieberman Aiden, Erez, Kocher, Sarah D.
Materialtyp: artículo original
Utgivningstid:2023
Beskrivning:Sweat bees have repeatedly gained and lost eusociality, a transition from individual to group reproduction. Here we generate chromosome-length genome assemblies for 17 species and identify genomic signatures of evolutionary trade-offs associated with transitions between social and solitary living. Both young genes and regulatory regions show enrichment for these molecular patterns. We also identify loci that show evidence of complementary signals of positive and relaxed selection linked specifically to the convergent gains and losses of eusociality in sweat bees. This includes two pleiotropic proteins that bind and transport juvenile hormone (JH)—a key regulator of insect development and reproduction. We find that one of these proteins is primarily expressed in subperineurial glial cells that form the insect blood–brain barrier and that brain levels of JH vary by sociality. Our findings are consistent with a role of JH in modulating social behaviour and suggest that eusocial evolution was facilitated by alteration of the proteins that bind and transport JH, revealing how an ancestral developmental hormone may have been co-opted during one of life’s major transitions. More broadly, our results highlight how evolutionary trade-offs have structured the molecular basis of eusociality in these bees and demonstrate how both directional selection and release from constraint can shape trait evolution.
Land:Kérwá
Organisation:Universidad de Costa Rica
Repositorio:Kérwá
Språk:Inglés
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/89563
Länkar:https://www.nature.com/articles/s41559-023-02001-3
https://hdl.handle.net/10669/89563
Nyckelord:Sweet bees
Eusociality
Genomic signature
Juvenile hormone
Trait evolution

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