The study investigates the genetic load associated with self-incompatibility alleles in Arabidopsis species. It examines the impact of balancing selection on dominant and recessive S-alleles, revealing differences in the accumulation of deleterious mutations. The research combines phenotypic, genomic, and theoretical approaches to dissect patterns of linked genetic load across populations and species. Results suggest that while dominant S-alleles accumulate more fixed deleterious mutations, recessive S-alleles tend to accumulate more segregating mutations. This study sheds light on the evolutionary dynamics of new S-alleles and dominance modifiers within self-incompatibility systems.
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by Le veve,A., ... alle www.biorxiv.org 11-15-2023
https://www.biorxiv.org/content/10.1101/2023.11.12.566794v1Domande più approfondite