An Experimental Test of Adaptive Introgression in Locally Adapted Populations of Splash Pool Copepods.

ABSTRACT: As species struggle to keep pace with the rapidly warming climate, adaptive introgression of beneficial alleles from closely related species or populations provides a possible avenue for rapid adaptation. We investigate the potential for adaptive introgression in the copepod, Tigriopus californicus, by hybridizing two populations with divergent heat tolerance limits. We subjected hybrids to strong heat selection for 15 generations followed by whole-genome resequencing. Utilizing a hybridize evolve and resequence (HER) technique, we can identify loci responding to heat selection via a change in allele frequency. We successfully increased the heat tolerance (measured as LT50) in selected lines, which was coupled with higher frequencies of alleles from the southern (heat tolerant) population.

SUBMITTER: Griffiths JS 

PROVIDER: S-EPMC8042754 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature