10.5061/DRYAD.M2J85
Parsons, Kevin J.
University of Glasgow
Concannon, Moira
University of Massachusetts Amherst
Navon, Dina
University of Massachusetts Amherst
Wang, Jason
University of Massachusetts Amherst
Ea, Ilene
University of Massachusetts Amherst
Groveas, Kiran
University of Massachusetts Amherst
Campbell, Calum
University of Glasgow
Albertson, R. Craig
University of Massachusetts Amherst
Data from: Foraging environment determines the genetic architecture and
evolutionary potential of trophic morphology in cichlid fishes
Dryad
dataset
2016
Tropheops
Haplochromus
QTL
Genetic assimilation
National Science Foundation
https://ror.org/021nxhr62
IOS-1054909
2016-10-18T15:14:19Z
2016-10-18T15:14:19Z
en
https://doi.org/10.1111/mec.13801
472308 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Phenotypic plasticity allows organisms to change their phenotype in
response to shifts in the environment. While a central topic in current
discussions of evolutionary potential, a comprehensive understanding of
the genetic underpinnings of plasticity is lacking in systems undergoing
adaptive diversification. Here, we investigate the genetic basis of
phenotypic plasticity in a textbook adaptive radiation, Lake Malawi
cichlid fishes. Specifically, we crossed two divergent species to generate
an F3 hybrid mapping population. At early juvenile stages, hybrid families
were split and reared in alternate foraging environments that mimicked
benthic/scraping or limnetic/sucking modes of feeding. These alternate
treatments produced a variation in morphology that was broadly similar to
the major axis of divergence among Malawi cichlids, providing support for
the flexible stem theory of adaptive radiation. Next, we found that the
genetic architecture of several morphological traits was highly sensitive
to the environment. In particular, of 22 significant quantitative trait
loci (QTL), only one was shared between the environments. In addition, we
identified QTL acting across environments with alternate alleles being
differentially sensitive to the environment. Thus, our data suggest that
while plasticity is largely determined by loci specific to a given
environment, it may also be influenced by loci operating across
environments. Finally, our mapping data provide evidence for the evolution
of plasticity via genetic assimilation at an important regulatory locus,
ptch1. In all, our data address long-standing discussions about the
genetic basis and evolution of plasticity. They also underscore the
importance of the environment in affecting developmental outcomes, genetic
architectures, morphological diversity and evolutionary potential.
LateralAllometryRemovedF3impFormatLateral landmarks with allometry
removedventralallometrycorrectedLMsVentral landmarks with allometry
removedAll_F3_phenotypesAll traits from F3 hybrid cichlids, including the
genetic map.
la
Lake Malawi