---
res:
  bibo_abstract:
  - Genetic incompatibilities contribute to reproductive isolation between many diverging
    populations, but it is still unclear to what extent they play a role if divergence
    happens with gene flow. In contact zones between the "Crab" and "Wave" ecotypes
    of the snail Littorina saxatilis, divergent selection forms strong barriers to
    gene flow, while the role of post‐zygotic barriers due to selection against hybrids
    remains unclear. High embryo abortion rates in this species could indicate the
    presence of such barriers. Post‐zygotic barriers might include genetic incompatibilities
    (e.g. Dobzhansky–Muller incompatibilities) but also maladaptation, both expected
    to be most pronounced in contact zones. In addition, embryo abortion might reflect
    physiological stress on females and embryos independent of any genetic stress.
    We examined all embryos of >500 females sampled outside and inside contact zones
    of three populations in Sweden. Females' clutch size ranged from 0 to 1,011 embryos
    (mean 130 ± 123), and abortion rates varied between 0% and 100% (mean 12%). We
    described female genotypes by using a hybrid index based on hundreds of SNPs differentiated
    between ecotypes with which we characterized female genotypes. We also calculated
    female SNP heterozygosity and inversion karyotype. Clutch size did not vary with
    female hybrid index, and abortion rates were only weakly related to hybrid index
    in two sites but not at all in a third site. No additional variation in abortion
    rate was explained by female SNP heterozygosity, but increased female inversion
    heterozygosity added slightly to increased abortion. Our results show only weak
    and probably biologically insignificant post‐zygotic barriers contributing to
    ecotype divergence, and the high and variable abortion rates were marginally,
    if at all, explained by hybrid index of females.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Kerstin
      foaf_name: Johannesson, Kerstin
      foaf_surname: Johannesson
  - foaf_Person:
      foaf_givenName: Zuzanna
      foaf_name: Zagrodzka, Zuzanna
      foaf_surname: Zagrodzka
  - foaf_Person:
      foaf_givenName: Rui
      foaf_name: Faria, Rui
      foaf_surname: Faria
  - foaf_Person:
      foaf_givenName: Anja M
      foaf_name: Westram, Anja M
      foaf_surname: Westram
      foaf_workInfoHomepage: http://www.librecat.org/personId=3C147470-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0003-1050-4969
  - foaf_Person:
      foaf_givenName: Roger K.
      foaf_name: Butlin, Roger K.
      foaf_surname: Butlin
  bibo_doi: 10.1111/jeb.13570
  bibo_issue: '3'
  bibo_volume: 33
  dct_date: 2020^xs_gYear
  dct_identifier:
  - UT:000500954800001
  dct_isPartOf:
  - http://id.crossref.org/issn/1010-061X
  - http://id.crossref.org/issn/1420-9101
  dct_language: eng
  dct_publisher: Wiley@
  dct_title: Is embryo abortion a post-zygotic barrier to gene flow between Littorina
    ecotypes?@
  fabio_hasPubmedId: '31724256'
...