Inheritance of Vertebral Number in Sticklebacks
Author Information
Author(s): Jussi S. Alho, Tuomas Leinonen, Juha Merilä
Primary Institution: University of Helsinki
Hypothesis
What are the genetic and environmental influences on the number of vertebrae in three-spined sticklebacks?
Conclusion
The study found that the number of vertebrae in three-spined sticklebacks is heritable, and that variation in vertebral number is positively associated with variation in body size, although this correlation is non-genetic.
Supporting Evidence
- The heritability of vertebral number was estimated to be 0.36.
- Body size was found to be moderately heritable with a heritability estimate of 0.42.
- There was no significant genetic correlation between body size and vertebral number.
Takeaway
This study shows that how many bones a stickleback fish has in its back can be passed down from parent to child, and that more bones can mean a bigger fish, but this isn't always because of genes.
Methodology
The study used a paternal half-sib design and animal model analysis to estimate heritability and causal components of variance in vertebral number.
Potential Biases
Potential bias from not fully accounting for maternal effects and environmental factors.
Limitations
The study may not account for all environmental influences on vertebral number due to controlled laboratory conditions.
Participant Demographics
The fish were collected from the Baltic Sea near Helsinki, Finland.
Statistical Information
P-Value
0.001
Confidence Interval
95% HPDI: 0.104–0.603 for vertebral number heritability
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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