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Related Experiment Video

Updated: May 19, 2026

A Quantitative Fitness Analysis Workflow
11:39

A Quantitative Fitness Analysis Workflow

Published on: August 13, 2012

A quantitative fitness analysis workflow.

A P Banks1, C Lawless, D A Lydall

  • 1Institute for Cell and Molecular Biosciences, Newcastle University Medical School.

Journal of Visualized Experiments : Jove
|August 22, 2012
PubMed
Summary
This summary is machine-generated.

Quantitative Fitness Analysis (QFA) is a high-throughput method for comparing microbial culture fitness. This workflow enables genome-wide screens for genetic interactions and drug sensitivities in yeast and bacteria.

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Area of Science:

  • Microbiology
  • Genetics
  • Computational Biology

Background:

  • Quantitative Fitness Analysis (QFA) is a workflow for comparing microbial culture fitness.
  • It is applicable to single cultures but most useful for genome-wide genetic interaction or drug screens.
  • QFA analyzes cell density from images to construct growth curves and derive fitness measures.

Purpose of the Study:

  • To present a specific QFA protocol for high-throughput screening of thousands of microbial cultures.
  • To demonstrate the adaptability of QFA for both automated and manual workflows.
  • To highlight QFA's utility for studying genetic interactions and drug sensitivities.

Main Methods:

  • Inoculating dilute microbial cultures onto solid agar plates.
  • Incubating plates and regularly photographing culture growth.
  • Analyzing images to quantify cell density, construct growth curves, and estimate fitness.

Main Results:

  • QFA provides quantitative fitness measures comparable to traditional methods but with significantly higher throughput.
  • The workflow captures complete growth curves, enabling precise estimation of doubling times.
  • Automated and manual protocols were developed, both compatible with QFA software.

Conclusions:

  • QFA is a versatile and high-throughput method for microbial fitness analysis.
  • It is suitable for genome-wide screens, drug sensitivity testing, and genetic interaction studies.
  • QFA is applicable to various microorganisms, including S. cerevisiae, S. pombe, and bacteria.