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Related Experiment Video

Updated: Jul 9, 2026

Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy

Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy

Published on: June 25, 2013

Recombination rate and protein evolution in yeast.

Tim Connallon¹, L Lacey Knowles

¹Department of Ecology and Evolutionary Biology,Museum of Zoology, University of Michigan, Ann Arbor, MI 48109-1079, USA. tconnal@umich.edu

BMC Evolutionary Biology

|November 29, 2007

Summary

Recombination significantly reduces molecular evolution rates in yeast genes prone to slightly deleterious mutations. This highlights the long-term fitness advantages of sexual reproduction and purifying selection across the genome.

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Area of Science:

Evolutionary Biology
Genetics
Molecular Evolution

Background:

Recombination's role in adaptation is theoretically understood but empirically debated.
Genetic divergence patterns offer insights into recombination's long-term effects.
Distinguishing selection types complicates the study of recombination and divergence.

Purpose of the Study:

To investigate how recombination influences molecular evolution across different gene categories.
To assess the impact of recombination on slightly deleterious substitutions.
To test the benefits of sexual recombination in natural populations.

Main Methods:

Analysis of polymorphism and genomic data in Saccharomyces cerevisiae.
Inference of nearly-neutral evolution's importance in various gene types.
Correlation of recombination rates with molecular evolutionary rates.

Main Results:

Recombination substantially reduces molecular evolution in genes with high potential for deleterious substitutions.
Genes with limited opportunities for deleterious substitutions show less impact from recombination.
A clear link between recombination rate and reduced molecular evolution was observed.

Conclusions:

A gene's specific recombinational environment strongly influences genome-wide adaptation.
Sexual recombination provides significant long-term fitness benefits through enhanced purifying selection.
Recombination's impact on purifying selection is a key driver of adaptation.