---
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 postzygotic barriers due to selection against hybrids
    remains unclear. High embryo abortion rates in this species could indicate the
    presence of such barriers. Postzygotic 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 1011
    embryos (mean 130±123) and abortion rates varied between 0 and100% (mean 12%).
    We described female genotypes by using a hybrid index based on hundreds of SNPs
    differentiated between ecotypes with which we characterised 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 postzygotic 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
      foaf_name: Butlin, Roger
      foaf_surname: Butlin
  bibo_doi: 10.5061/DRYAD.TB2RBNZWK
  dct_date: 2019^xs_gYear
  dct_publisher: Dryad@
  dct_title: 'Data from: Is embryo abortion a postzygotic barrier to gene flow between
    Littorina ecotypes?@'
...