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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BlackWell Publishing Ltd
2013
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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. |
format | Online Article Text |
id | pubmed-4352335 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | BlackWell Publishing Ltd |
record_format | MEDLINE/PubMed |
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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