10.5061/DRYAD.82D5F33
Brennan, Adrian C.
Durham University
Hiscock, Simon J.
University of Oxford
Abbott, Richard J.
University of St Andrews
Data from: Completing the hybridization triangle: the inheritance of
genetic incompatibilities during homoploid hybrid speciation in ragworts
(Senecio).
Dryad
dataset
2019
Genetic mapping
genetic incompatibility
Senecio aethnensis
Senecio squalidus
Homoploid hybrid speciation
transmission ratio distortion
Holocene
Genomic rearrangement
Senecio chrysanthemifolius
2019-01-07T22:07:07Z
2019-01-07T22:07:07Z
en
https://doi.org/10.1093/aobpla/ply078
258591 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
A new homoploid hybrid lineage needs to establish a degree of reproductive
isolation from its parent species if it is to persist as an independent
entity, but the role hybridization plays in this process is known in only
a handful of cases. The homoploid hybrid ragwort species, Senecio
squalidus, (Oxford ragwort) originated following the introduction of
hybrid plants to the UK approximately 320 years ago. The source of the
hybrid plants was from a naturally occurring hybrid zone between S.
aethnensis and S. chrysanthemifolius on Mount Etna, Sicily. Previous
studies of the parent species found evidence for multiple incompatibility
loci causing transmission ratio distortion of genetic markers in their
hybrid progeny. This study closes the hybridization triangle by reporting
a genetic mapping analysis of the remaining two paired cross combinations
between S. squalidus and its parents. Genetic maps produced from F2
mapping families were generally collinear but with half of the linkage
groups showing evidence of genomic reorganization between genetic maps.
The new maps produced from crosses between S. squalidus and each parent
showed multiple incompatibility loci distributed across the genome, some
of which co-locate with previously reported incompatibility loci between
the parents. These findings suggest that this young homoploid hybrid
species has inherited a unique combination of genomic rearrangements and
incompatibilities from its parents that contribute to its reproductive
isolation.
F2AScodominantgenotypesCodominant marker genotypes for an F2 Senecio
aethnensis x S. squalidus mapping familyF2CScodominantgenotypesCodominant
marker genotypes for an F2 Senecio chrysanthemifolius x S. squalidus
mapping familyF2ASdominantgenotypesDominant marker genotypes for an F2
Senecio aethnensis x S. squalidus mapping
familyF2CSdominantgenotypesDominant marker genotypes for an F2 Senecio
chrysanthemifolius x S. squalidus mapping familyF2genotypesnotesNotes
explaining the data files: F2AScodominantgenotypes, F2ASdominantgenotypes,
F2CScodominantgenotypes, and F2CSdominantgenotypesF2ASjoinmapJoinmap
formatted input file for an F2 S. aethnensis x S. squalidus mapping
familyF2CSjoinmapJoinmap formatted input file for an F2 S.
chrysanthemifolius x S. squalidus mapping familyF2joinmapnotesNotes for
F2ASjoinmap and F2CSjoinmap data filesF2ASmapGenetic linkage map for an F2
S. aethnensis x S. squalidus mapping familyF2CSmapGenetic linkage map for
an F2 S. chrysanthemifolius x S. squalidus mapping familyF2mapnotesNotes
for F2ASmap and F2CSmap data files
Sicily
UK
Italy