Multi-environment fitness landscapes of a tRNA gene.

ABSTRACT: A fitness landscape (FL) describes the genotype-fitness relationship in a given environment. To explain and predict evolution, it is imperative to measure the FL in multiple environments because the natural environment changes frequently. Using a high-throughput method that combines precise gene replacement with next-generation sequencing, we determine the in vivo FL of a yeast tRNA gene comprising over 23,000 genotypes in four environments. Although genotype-by-environment interaction is abundantly detected, its pattern is so simple that we can transform an existing FL to that in a new environment with fitness measures of only a few genotypes in the new environment. Under each environment, we observe prevalent, negatively biased epistasis between mutations. Epistasis-by-environment intera

SUBMITTER: Li C 

PROVIDER: S-EPMC5966336 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature