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The Heritability of Behavior: A Meta-analysis
Ned A Dochtermann1, Tori Schwab1, Monica Anderson Berdal1
1Department of Biological Sciences, North Dakota State University, Fargo, ND.
The Journal of Heredity
|May 23, 2019
Summary
This meta-analysis reveals that behavioral traits have an average heritability of 0.235, similar to other traits. Migratory behaviors are the most heritable, indicating genetic influence on population evolution.
Area of Science:
- Evolutionary Biology
- Behavioral Ecology
- Quantitative Genetics
Background:
- Heritability quantifies genetic contribution to phenotypic variation, crucial for understanding population adaptation.
- Labile traits like behavior are highly influenced by environmental factors, necessitating heritability estimation.
- Understanding genetic variation is key to predicting evolutionary responses to selection.
Purpose of the Study:
- To conduct a meta-analysis on the heritability of behavior across diverse taxa.
- To assess average behavioral heritability and identify factors influencing variation.
- To compare behavioral heritability with that of physiological and life history traits.
Main Methods:
- Phylogenetically controlled meta-analysis of published heritability estimates for behaviors.
- Examination of differences in heritability across taxa, behavioral classifications, and other biological factors.
- Statistical assessment of the influence of phylogeny on heritability estimates.
Main Results:
- The average heritability of behavior was estimated at 0.235, comparable to physiological and life history traits.
- Significant variation in heritability was observed among different types of behaviors, with migratory behaviors showing the highest heritability.
- No significant effect of phylogeny was detected on behavioral heritability estimates.
Conclusions:
- Behavioral traits are not unique in their degree of genetic influence compared to other trait types.
- Environmental factors and specific trait characteristics play a significant role in determining behavioral heritability.
- Further research is needed to identify the specific factors that contribute to low or high heritability in behavioral traits.
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