10.5061/DRYAD.3T8T4
Messina, Frank J.
Utah State University
Gompert, Zachariah
Utah State University
Data from: Evolution of host acceptance and its reversibility in a seed beetle
Dryad
dataset
2017
2017-10-05T00:00:00Z
2017-10-05T00:00:00Z
en
https://doi.org/10.1111/een.12352
13975 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Adapting to a low-quality plant may require modification of an
insect's digestive physiology, oviposition behaviour, or other
host-use traits. If colonising a marginal host entails a cost, a decay in
adaptation would be expected after selection is relaxed, i.e. if
populations on a novel host are reverted to their high-quality ancestral
host. 2. Replicate lines of the seed beetle Callosobruchus maculatus (F.)
rapidly adapted to lentil seeds; larval survival rose from approximately 1
to ≥ 90%, and oviposition on lentil increased more than two-fold. This
study compared egg-laying behaviour in lines that either remained on
lentil or were reverted to the ancestral host, mung bean, for 22–62
generations. 3. Consistent with the trade-off hypothesis, females from two
reverted sublines showed decreased oviposition on lentil (estimated as
lifetime fecundity), but host acceptance in a third subline was unchanged.
In a short-term assay, acceptance of lentil by newly emerged females was
lower in each reverted subline than in the corresponding non-reverted one.
Because effective population sizes (determined from genome resequencing)
were large throughout the experiment, this decline in host acceptance is
unlikely to be explained solely by genetic drift. 4. Variation among
replicates in the magnitude of the reversion effect was also observed in a
previous study of larval survival. However, the pattern of variation for
survival was not congruent with the pattern of variation for host
acceptance in this study. Thus, genes mediating improved performance on
lentil appear to be largely independent of those responsible for increased
oviposition.
Experimental host accepance dataThis compressed directory contains the csv
data files from the host acceptance experiments. Data from the lifetime
host acceptance assays are labelled with the generation number and host.
These include columns with the line number, subline (R=reverted, NR=not
reverted) and number of eggs laid. The SINGLESEEDASSAY.csv file contains
the data from the short term assay. Here columns give the line, subline,
host, and counts for the number of beetles that laid (LAID?=Y) versus
didn't lay (LAID?=N) an egg during the assay.Data.tar.gzR script for
liftetime fecundity assaysThis R script contains the code used to conduct
the Bayesian analyses of lifetime fecundity. It requires JAGS and
rjags.estBeetlePref.RR script for single seed assaysThis R script contains
the code used to conduct the Bayesian analyses of short-term host
acceptance. It requires JAGS and rjags.estBeetleBin.RJAGS model, lifetime
fecundityJAGS model block for the lifetime fecundity analyses.prefmodJAGS
model, short-term host acceptanceJAGS model block for the short-term host
acceptance analyses.binmod