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Title: Data from: Is sex advantageous in adverse environments? A test of the abandon-ship hypothesis      
keywords:
Adaptation
Reproduction: strategies
Sex: allocation
Plant
evolution of sex
herbivory
plant defense
type:
Article
description:
Understanding the evolution and maintenance of sexual reproduction remains a long-standing challenge in evolutionary biology. Stress often induces sexual reproduction in facultatively sexual species (those species capable of both sexual and asexual reproduction). The abandon-ship hypothesis predicts higher allocation to sex under stress to allow low-fitness individuals to recombine their genotype, potentially increasing offspring fitness. However, effective tests of the abandon-ship hypothesis, particularly in multicellular organisms, are lacking. Here we test the abandon-ship hypothesis, using cyanogenic and acyanogenic defense phenotypes of the short-lived perennial herb Trifolium repens. Cyanogenesis provides an effective defense against herbivores and is under relatively simple genetic control (plants dominant for cyanogenesis at two alleles express the defended phenotype). Thus, maladapted individuals can acquire adaptive defense alleles for their offspring in a single episode of sexual reproduction. Plants were grown under high- and low-herbivory treatments (plants were exposed to herbivorous snails) and a control treatment (no herbivory). Herbivores reduced growth and fitness in all treated plants, but herbivory induced higher sexual allocation only in maladapted (acyanogenic) individuals. Overall, our results support the abandon-ship hypothesis.
ID:
oai:datadryad.org:10255/dryad.52110
accesstypes:
download
landingPage: http://hdl.handle.net/10255/dryad.52110
authentication:
none
authorization:
none
ID:
doi:10.5061/dryad.nn27f
Griffiths JG, Bonser SP (2013) Is sex advantageous in adverse environments? A test of the abandon-ship hypothesis. The American Naturalist 182(6): 718-725.
http://hdl.handle.net/10255/dryad.52110
amNat-54028
setID:
hdl_10255_3
recNum:
74
setName:
Main
dateReleased:
05-31-2017
issueDate:
20131009
accessionDate:
07-19-2013
dateCreated:
07-19-2013
abbreviation:
Dryad
ID:
SCR:005910
name:
Dryad Digital Repository
homepage: http://www.datadryad.org
ID:
SCR:005910
name:
Dryad Data Repository

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