Global epistasis makes adaptation predictable despite sequence-level stochasticity

Author:

Kryazhimskiy Sergey12,Rice Daniel P.12,Jerison Elizabeth R.32,Desai Michael M.132

Affiliation:

1. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.

2. FAS Center for Systems Biology, Harvard University, Cambridge, MA 02138, USA.

3. Department of Physics, Harvard University, Cambridge, MA 02138, USA.

Abstract

Clouding evolution's crystal ball Because of a sort of mutation buffering process, different starting mutations can tend to end up with similar overall affects on an organism's fitness. Kryazhimskiy et al. evolved lines of yeast, each originating from distinct single genotypes, under the same selective regimen. A subset of clones from these adapted populations was subjected to fitness assays and sequenced. Populations with lower initial fitness, adapted more rapidly than populations with higher initial fitness, so that in the end the fitness levels were similar. Science , this issue p. 1519

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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