Current Contents

4. Short-term Changes in the Mean: The Breeders' Equation

• Single-generation Response: The Breeders' Equation
  • Response is the Change in Mean Breeding Value
  • The importance of linearity
  • Response under More General Parent-offspring Regressions
  • The Selection Intensity
  • The Robertson-Price Identity
  • Correcting for Reproductive Differences: Effective Selection Differentials
• Expanding the Basic Breeders' Equation
  • Accuracy
  • Stratified Mass Selection
  • Adjustments for Non-overlapping Generations
  • Maximizing Response Under the Breeders' Equation
  • Maximizing the Economic Rate of Response
  • Prelude to the multivariate breeders' equation
• Truncation Selection
  • Selection intensities and differentials under truncation selection
  • Correcting the selection intensity for finite sample
• Response with Discrete Traits: Binary Characters
  • The Threshold/Liability Model
  • Logistic Regressions and the Logistic Distribution
  • Direct Selection on the Threshold T
• Response with Discrete Traits: Poisson-Distirbuted Characters
• Summary: Limitations of the Breeders' Equation

PDF versions of a recent draft of this chapter are available. Feel free to use this for personal and/or class use until the book is available. Please note that these are copyrighted and that I would greatly appreciate feedback . Note that while the screen view can look funny in places, the printed output is fine.

• Chapter 4 PDF file ( v. 20 March 2007): (736K)

Programs

Home Pages: [ Volume One ] - [ Volume Two ] - [ What's new ] - [ Book]

Bruce Walsh. jbwalsh@u.arizona.edu . Comments welcome.