2016/04/21 by Diala Abu Awad, Awad, Diala Abu, Viet Chi Tran +3
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · Environmental Science · #Ecology and Vegetation Dynamics Studies #Evolution and Genetic Dynamics #FOS: Biological sciences #Plant and animal studies #Populations and Evolution (q-bio.PE)
paper · pdf · doi:10.48550/arxiv.1604.06358
openalex publication_date 2016/04/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
When predicting the fate and consequences of recurring deleterious mutations in self-fertilising populations most models developed make the assumption that populations have discrete non-overlapping generations. This makes them biologically irrelevant when considering perennial species with over-lapping generations and where mating occurs independently of the age group. Previous models studying the effect of perennial life-histories on the genetic properties of populations in the presence of self-fertilisation have done so considering age-dependent selection and have found that, contrary to empirical observations, perennial populations should exhibit lower levels of inbreeding depression. Here we propose a simple deterministic model in continuous time with selection at different fitness traits and feedback between population fitness and size. We find that a perennial life-history can result in high levels of inbreeding depression in spite of inbreeding, due to higher frequencies of heterozygous individuals at the adult stage. We also propose that there may be demographic advantages for self-fertilisation that are independent of reproductive success.