Long-term balancing selection for pathogen resistance maintains trans-species polymorphisms in a planktonic crustacean.

ABSTRACT: Balancing selection is an evolutionary process that maintains genetic polymorphisms at selected loci and strongly reduces the likelihood of allele fixation. When allelic polymorphisms that predate speciation events are maintained independently in the resulting lineages, a pattern of trans-species polymorphisms may occur. Trans-species polymorphisms have been identified for loci related to mating systems and the MHC, but they are generally rare. Trans-species polymorphisms in disease loci are believed to be a consequence of long-term host-parasite coevolution by balancing selection, the so-called Red Queen dynamics. Here we scan the genomes of three crustaceans with a divergence of over 15 million years and identify 11 genes containing identical-by-descent trans-species polymorphisms with t

SUBMITTER: Cornetti L 

PROVIDER: S-EPMC11193740 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature