Developmental stability and enzyme heterozygosity in rainbow trout.

Area of Science:

• Developmental Biology
• Genetics
• Ecology

Background:

• Organisms possess genetically controlled developmental pathways to ensure species-specific morphology.
• Developmental buffering can be imprecise, leading to bilateral asymmetry.
• Fluctuating asymmetry, a measure of developmental instability, arises from deviations in precise development.

Purpose of the Study:

• To investigate the relationship between fluctuating asymmetry and heterozygosity in rainbow trout.
• To determine if increased heterozygosity correlates with enhanced developmental stability.

Main Methods:

• Assessed fluctuating asymmetry for five bilateral characters in rainbow trout.
• Analyzed heterozygosity at 13 polymorphic loci within the same population.

Main Results:

• A significant negative correlation was observed between heterozygosity and fluctuating asymmetry.
• Higher proportions of heterozygous loci were associated with lower proportions of asymmetric characters.

Conclusions:

• Increased heterozygosity in rainbow trout is linked to enhanced developmental stability.
• Genetic diversity may play a crucial role in buffering developmental perturbations.