In:
PLOS Biology, Public Library of Science (PLoS), Vol. 20, No. 1 ( 2022-1-10), p. e3001469-
Abstract:
Hybrid incompatibilities occur when interactions between opposite ancestry alleles at different loci reduce the fitness of hybrids. Most work on incompatibilities has focused on those that are “intrinsic,” meaning they affect viability and sterility in the laboratory. Theory predicts that ecological selection can also underlie hybrid incompatibilities, but tests of this hypothesis using sequence data are scarce. In this article, we compiled genetic data for F 2 hybrid crosses between divergent populations of threespine stickleback fish ( Gasterosteus aculeatus L.) that were born and raised in either the field (seminatural experimental ponds) or the laboratory (aquaria). Because selection against incompatibilities results in elevated ancestry heterozygosity, we tested the prediction that ancestry heterozygosity will be higher in pond-raised fish compared to those raised in aquaria. We found that ancestry heterozygosity was elevated by approximately 3% in crosses raised in ponds compared to those raised in aquaria. Additional analyses support a phenotypic basis for incompatibility and suggest that environment-specific single-locus heterozygote advantage is not the cause of selection on ancestry heterozygosity. Our study provides evidence that, in stickleback, a coarse—albeit indirect—signal of environment-dependent hybrid incompatibility is reliably detectable and suggests that extrinsic incompatibilities can evolve before intrinsic incompatibilities.
Type of Medium:
Online Resource
ISSN:
1545-7885
DOI:
10.1371/journal.pbio.3001469
DOI:
10.1371/journal.pbio.3001469.g001
DOI:
10.1371/journal.pbio.3001469.g002
DOI:
10.1371/journal.pbio.3001469.t001
DOI:
10.1371/journal.pbio.3001469.s001
DOI:
10.1371/journal.pbio.3001469.s002
DOI:
10.1371/journal.pbio.3001469.s003
DOI:
10.1371/journal.pbio.3001469.s004
DOI:
10.1371/journal.pbio.3001469.s005
DOI:
10.1371/journal.pbio.3001469.s006
DOI:
10.1371/journal.pbio.3001469.s007
DOI:
10.1371/journal.pbio.3001469.s008
DOI:
10.1371/journal.pbio.3001469.s009
DOI:
10.1371/journal.pbio.3001469.s010
DOI:
10.1371/journal.pbio.3001469.s011
DOI:
10.1371/journal.pbio.3001469.s012
DOI:
10.1371/journal.pbio.3001469.s013
DOI:
10.1371/journal.pbio.3001469.r001
DOI:
10.1371/journal.pbio.3001469.r002
DOI:
10.1371/journal.pbio.3001469.r003
DOI:
10.1371/journal.pbio.3001469.r004
DOI:
10.1371/journal.pbio.3001469.r005
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2022
detail.hit.zdb_id:
2126773-X
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