10.5061/DRYAD.8931ZCRV0
Takami, Yasuoki
0000-0002-6507-2115
Kobe University
Dataset for Xia et al.: Reproductive isolation via divergent genital
morphology due to cascade reinforcement in Ohomopterus ground beetles
Dryad
dataset
2022
FOS: Biological sciences
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
19770014
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
22770019
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
24570024
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
16H04844
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
15207004
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
23370011
2022-10-10T00:00:00Z
2022-10-10T00:00:00Z
en
2908253912 bytes
4
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Secondary contact between incipient species and selection against
maladaptive hybridization can drive reinforcement between populations in
contact and result in reproductive character displacement (RCD). Resultant
divergence in mating traits within a species may generate downstream
reproductive isolation between populations with displaced and
non-displaced traits, referred to as the cascade reinforcement hypothesis.
We examined this hypothesis using three allopatric populations of the
ground beetle Carabus maiyasanus with a genital lock-and-key system. This
species shows RCD in male and female genital morphologies in populations
in contact with the sister species C. iwawakianus. In a reciprocal mating
experiment using three allopatric populations with differences in male and
female genital sizes, inseminationfailure increased as the difference in
genital size increased. Based on the reproductive isolation index,
insemination failure was the major postmating-prezygotic isolation
barrier, at least in one population pair with comparable total isolation
to those of other species pairs. By contrast, there was only incomplete
premating isolation among populations. These results suggest that RCD in
genital morphologies drives incipient allopatric speciation, supporting
the cascade reinforcement hypothesis. These findings provide insight into
the roles of interspecific interactions and subsequent trait
diversification in speciation processes.