Data from: Chromosomal rearrangements do not seem to affect the gene flow in hybrid zones between karyotypic races of the common shrew (Sorex araneus)

Chromosomal rearrangements are proposed to promote genetic differentiation
between chromosomally differentiated taxa and therefore promote
speciation. Due to their remarkable karyotypic polymorphism, the shrews of
the Sorex araneus group were used to investigate the impact of chromosomal
rearrangements on gene flow. Five intraspecific chromosomal hybrid zones
characterized by different levels of karyotypic complexity were studied
using 16 microsatellites markers. We observed low levels of genetic
differentiation even in the hybrid zones with the highest karyotypic
complexity. No evidence of restricted gene flow between differently
rearranged chromosomes was observed. Contrary to what was observed at the
interspecific level, the effect of chromosomal rearrangements on gene flow
was undetectable within the S. araneus species.