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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.

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1 - Stony Brook University, Ecology and Evolution, 650 Life Sciences , Stony Brook, NY, 11764, USA

evening primrose
asexual reproduction
deleterious mutations
Population Genomics

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

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