Genetic similarity, breeding distribution range and sexual selection.

Area of Science:

• Evolutionary biology
• Population genetics
• Ornithology

Background:

• Genetic variability is crucial for species adaptation and long-term survival.
• Factors influencing genetic diversity in wild populations are complex and interconnected.
• Sexual selection can impact genetic diversity through mechanisms like differential reproductive success and mutation rates.

Purpose of the Study:

• To investigate the relationship between genetic variability and ecological/behavioral factors in bird species.
• To determine if breeding distribution range, population size, and sexual selection predict genetic variation.
• To analyze genetic variability using band sharing coefficients from minisatellite markers.

Main Methods:

• Studied 62 bird species from the Western Palearctic.
• Estimated genetic variability using band sharing coefficients from minisatellite markers.
• Correlated genetic variability with breeding distribution range, population size, subspecies richness, polygyny, and extra-pair paternity.

Main Results:

• Found significant interspecific variation in genetic variability (band sharing coefficients).
• Restricted breeding distributions and large population sizes were associated with lower genetic variability (higher band sharing).
• Higher subspecies richness correlated with greater genetic variability (lower band sharing), while increased polygyny and extra-pair paternity correlated with lower genetic variability (higher band sharing).

Conclusions:

• Breeding distribution range, population size, and sexual selection intensity are significant predictors of genetic variability in bird populations.
• Ecological and mating system characteristics play a key role in shaping contemporary genetic diversity.
• Understanding these factors is essential for conservation efforts and predicting species' adaptive potential.