10.5061/DRYAD.3V321
Kropáčková, Lucie
Charles University
Piálek, Jaroslav
Institute of Vertebrate Biology
Gergelits, Václav
Institute of Molecular Genetics
Forejt, Jiří
Institute of Molecular Genetics
Reifová, Radka
Charles University
Data from: Maternal-fetal genomic conflict and speciation: no evidence for
hybrid placental dysplasia in crosses between two house mouse subspecies
Dryad
dataset
2015
Sexual selection & conflicts
2015-02-11T17:48:46Z
2015-02-11T17:48:46Z
en
https://doi.org/10.1111/jeb.12602
53479 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Interspecific hybridization between closely related mammalian species,
including various species of the genus Mus, is commonly associated with
abnormal growth of the placenta and hybrid fetuses, a phenomenon known as
hybrid placental dysplasia (HPD). The role of HPD in speciation is
anticipated but still poorly understood. Here we studied placental and
fetal growth in F1 crosses between four inbred mouse strains derived from
two house mouse subspecies, Mus musculus musculus and M. m. domesticus.
These subspecies are in the early stage of speciation and still hybridize
in nature. In accordance with the maternal-fetal genomic conflict
hypothesis we found different parental influences on placental and fetal
development, with placental weight most affected by the father's body
weight, and fetal weight by the mother's body weight. After removing
the effects of parents’ body weight, we did not find any significant
differences in fetal or placental weights between intra-subspecific and
inter-subspecific F1 crosses. Nevertheless, we found that the variability
in placental weight in inter-subspecific crosses is linked to the X
chromosome, similarly as for HPD in interspecific mouse crosses. Our
results suggest that maternal-fetal genomic conflict occurs in the house
mouse system, but has not yet diverged sufficiently to cause abnormalities
in placental and fetal growth in inter-subspecific crosses. HPD is thus
unlikely to contribute to speciation in the house mouse system. However,
we cannot rule out that it might have contributed to other speciation
events in the genus Mus, where differences in the levels of polyandry
exist between the species.
Kropackova-et-al-dataData on fetal and placental weights in F1 crosses and
backcrosses. X chromosome genotypes of backcross individuals.