10.5061/DRYAD.RT1NP
Power, Daniel J.
Australian National University
Holman, Luke
Australian National University
Data from: Assessing the alignment of sexual and natural selection using
radio-mutagenized seed beetles
Dryad
dataset
2015
Mutagenesis
Callosobruchus maculatus
2015-03-20T20:47:23Z
2015-03-20T20:47:23Z
en
https://doi.org/10.1111/jeb.12625
2879 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
A major unsolved question in evolutionary biology concerns the
relationship between natural and sexual selection. Sexual selection might
augment natural selection, e.g. if mutations that harm female fecundity
also reduce male mating success. Conversely, sexual selection might favor
traits that impair naturally-selected fitness components. We induced
detrimental mutations in Callosobruchus maculatus beetles using X-ray
irradiation, and then experimentally measured the effect of pre-copulatory
sexual selection on offspring number and survival rate. Sexual selection
treatment had a negative effect on egg-to-adult survivorship, though the
number of progeny reaching adulthood was unaffected, perhaps because eggs
and juveniles that failed to develop lessened competition on the
survivors. We hypothesize that the negative effect of sexual selection
arose because sexually competitive males transmitted a smaller nuptial
gift, or carried alleles that conferred reduced survival. Although we
found no evidence that sexual selection on males can purge alleles that
are detrimental to naturally-selected fitness components, such benefits
might exist in other environmental or genetic contexts.
For Dryad - Power and Holman 2015 - mutagenesis and sexual selectionEach
row describes fitness measurements on one female (n=78 females).
Treatment: The sexual selection treatment (present/absent). Replicate: The
replicate of the experiment (replicate 1 used beetles from the M2 stock,
rep 2 from the M3 stock). Columns 3-5 give the number of eggs that eclosed
into adults, the number of eggs that we checked for survival, and the
proportion of eggs reaching adulthood (i.e. the ratio columns 3 and 4).
Columns 6-8 give the number of sons and daughters produced, and the sum of
these (i.e. total progeny production). The last column gives the
copulation duration.