Year: 2023
Type: article
Abstract: Variation is the raw material for evolution. Evolutionary potential is determined by the amount of genetic variation, but evolution can also alter the visibility of genetic variation to natural selection. Fluctuating environments are suggested to maintain genetic variation but they can also affect environmental variance, and thus, the visibility of genetic variation to natural selection. However, experimental studies testing these ideas are relatively scarce. In order to determine differences in evolutionary potential we quantified variance attributable to population, genotype and environment for populations of the bacterium Serratia marcescens. These populations had been experimentally evolved in constant and two fluctuating environments. We found that strains that evolved in fluctuating environments exhibited larger environmental variation suggesting that adaptation to fluctuations has decreased the visibility of genetic variation to selection. Abstract After a month long experimental evolution experiment in fluctuating and constant thermal environments Serratia marcescens clones were found to have evolved higher environmental variation in fluctuating environments than in constant environments.
Source: Journal of Evolutionary Biology
DOI: 10.1111/jeb.14178
Authors: Tarmo Ketola, Ilkka Kronholm
Institution: University of Jyväskylä
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $2,805
Funder: Academy of Finland
OpenAlex ID: W4367668716