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SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII

The handicap principle predicts that sexual traits are more susceptible to inbreeding depression than nonsexual traits. However, this hypothesis has received little testing and results are inconsistent. We used 11 generations of full-sibling mating to test the effect of inbreeding on sexual and nons...

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Autores principales: Bellamy, Lawrence, Chapman, Nadine, Fowler, Kevin, Pomiankowski, Andrew
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BlackWell Publishing Ltd 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4352335/
https://www.ncbi.nlm.nih.gov/pubmed/24033174
http://dx.doi.org/10.1111/evo.12135
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author Bellamy, Lawrence
Chapman, Nadine
Fowler, Kevin
Pomiankowski, Andrew
author_facet Bellamy, Lawrence
Chapman, Nadine
Fowler, Kevin
Pomiankowski, Andrew
author_sort Bellamy, Lawrence
collection PubMed
description The handicap principle predicts that sexual traits are more susceptible to inbreeding depression than nonsexual traits. However, this hypothesis has received little testing and results are inconsistent. We used 11 generations of full-sibling mating to test the effect of inbreeding on sexual and nonsexual traits in the stalk-eyed fly Diasemopsis meigenii. Consistent with the theoretical predictions, the male sexual trait (eyespan) decreased more than nonsexual traits (female eyespan and male wing length), even after controlling for body size variation. In addition, male eyespan was a reliable predictor of line extinction, unlike other nonsexual traits. After 11 generations, inbred lines were crossed to generate inbred and outbred families. All morphological traits were larger in outbred individuals than inbred individuals. This heterosis was greater in male eyespan than in male wing length, but not female eyespan. The elevated response in male eyespan to genetic stress mirrored the result found using environmental stress during larval development and suggests that common mechanisms underlie the patterns observed. Overall, these results support the hypothesis that male sexual traits suffer more from inbreeding depression than nonsexual traits and are in line with predictions based on the handicap principle.
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spelling pubmed-43523352015-03-27 SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII Bellamy, Lawrence Chapman, Nadine Fowler, Kevin Pomiankowski, Andrew Evolution Original Articles The handicap principle predicts that sexual traits are more susceptible to inbreeding depression than nonsexual traits. However, this hypothesis has received little testing and results are inconsistent. We used 11 generations of full-sibling mating to test the effect of inbreeding on sexual and nonsexual traits in the stalk-eyed fly Diasemopsis meigenii. Consistent with the theoretical predictions, the male sexual trait (eyespan) decreased more than nonsexual traits (female eyespan and male wing length), even after controlling for body size variation. In addition, male eyespan was a reliable predictor of line extinction, unlike other nonsexual traits. After 11 generations, inbred lines were crossed to generate inbred and outbred families. All morphological traits were larger in outbred individuals than inbred individuals. This heterosis was greater in male eyespan than in male wing length, but not female eyespan. The elevated response in male eyespan to genetic stress mirrored the result found using environmental stress during larval development and suggests that common mechanisms underlie the patterns observed. Overall, these results support the hypothesis that male sexual traits suffer more from inbreeding depression than nonsexual traits and are in line with predictions based on the handicap principle. BlackWell Publishing Ltd 2013-09 2013-05-22 /pmc/articles/PMC4352335/ /pubmed/24033174 http://dx.doi.org/10.1111/evo.12135 Text en © 2013 The Author(s). Evolution © 2013 The Society for the Study of Evolution.
spellingShingle Original Articles
Bellamy, Lawrence
Chapman, Nadine
Fowler, Kevin
Pomiankowski, Andrew
SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII
title SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII
title_full SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII
title_fullStr SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII
title_full_unstemmed SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII
title_short SEXUAL TRAITS ARE SENSITIVE TO GENETIC STRESS AND PREDICT EXTINCTION RISK IN THE STALK-EYED FLY, DIASEMOPSIS MEIGENII
title_sort sexual traits are sensitive to genetic stress and predict extinction risk in the stalk-eyed fly, diasemopsis meigenii
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4352335/
https://www.ncbi.nlm.nih.gov/pubmed/24033174
http://dx.doi.org/10.1111/evo.12135
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