Spontaneous mutations balance reproductive selective advantage and genetically determine longevity

Area of Science:

• Evolutionary biology
• Genetics
• Gerontology

Background:

• Species longevity is a complex trait influenced by various evolutionary and genetic factors.
• Understanding the determinants of lifespan is crucial for predicting species' responses to environmental changes.

Purpose of the Study:

• To propose a theoretical framework linking predation rates and mutation frequency to species' genetic longevity potential.
• To explain the evolutionary basis for the common lifespan observed in long-lived species.

Main Methods:

• Theoretical modeling approach.
• Analysis of selective advantages conferred by longevity-associated genotypes.
• Examination of mutation rates and their impact on lifespan.

Main Results:

• Genetic potential for longevity is theoretically determined by wild predation rates and spontaneous mutation frequency.
• A common lifespan arises from a balance between selective advantages for survival and the accumulation of life-limiting mutations.
• The frequency of life-limiting genes increases exponentially with age under uniform mutation rates.

Conclusions:

• Predation and mutation rates are key theoretical drivers of species' maximum lifespan.
• Evolutionary selection favors genotypes promoting survival, but mutation accumulation counteracts this.
• This model provides a basis for understanding the genetic architecture of aging and longevity across species.