Abstract Detail
Botany 2015 Colloquium: Phylogenomics and the 1000 plants (1KP) initiative Hollister, Jesse D. [1]. The evolutionary consequences of losing sex in the evening primroses​. Sexual reproduction is widespread among eukaryotic species. Theory predicts that loss of recombination and segregation leads to a buildup of deleterious mutations in asexual species, perhaps increasing the extinction risk of asexual lineages. However, there have been few empirical tests of the evolutionary consequences of loss of sex. Here we examine the genomic consequences of repeated loss of sex in the genus Oenothera (evening primroses). Using both population genomic and phylogenetic methods, we show that loss of sex is associated with a genome wide increase in nonsynonymous mutations. We also use demographic and population genetic analysis to estimate the ages and modes of speciation in independent asexual lineages, providing a genome wide view of the time-dependent effects of loss of recombination and segretation. These results give an insight into the evolutionary consequences of loss of sexual reproduction. Log in to add this item to your schedule
1 - Stony Brook University, Ecology and Evolution, 650 Life Sciences , Stony Brook, NY, 11764, USA
Keywords: evening primrose asexual reproduction deleterious mutations Population Genomics phylogenomics.
Presentation Type: Colloquium Presentations Session: C1 Location: Salon 4/The Shaw Conference Centre Date: Monday, July 27th, 2015 Time: 11:45 AM Number: C1016 Abstract ID:576 Candidate for Awards:None |