Is there a g factor for fitness?

Area of Science:

• Evolutionary biology
• Quantitative genetics
• Behavioral genetics

Background:

• Biological fitness is directly observable, unlike the latent 'g' factor in psychometrics.
• Genetic variation in fitness is poorly understood due to limited data.
• An 'f' factor is proposed to explain positive correlations among fitness components.

Purpose of the Study:

• To investigate the existence and significance of an 'f' factor in genetic variation of fitness.
• To determine if 'f' factor variation contributes substantially to genetic variation within populations.
• To assess the impact of natural selection on 'f' factor variation.

Main Methods:

• Analysis of experimental data on fitness components in natural populations.
• Comparison of 'f' factor importance across populations with varying natural selection pressures.
• Theoretical consideration of 'f' factor dynamics under mutation, environmental change, and selection.

Main Results:

• Experimental data support the existence of 'f' factor variation in some natural populations.
• The importance of the 'f' factor is reduced in populations with strong natural selection.
• Natural selection tends to minimize variation in the 'f' factor.

Conclusions:

• The 'f' factor demonstrably influences genetic variation in biological fitness.
• Its quantitative impact varies depending on population history and selection pressures.
• Understanding the 'f' factor is crucial for a comprehensive view of fitness evolution.