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The National Sheep Improvement Program: a review.

D E Wilson1, D G Morrical

  • 1Dept. of Anim. Sci., Iowa State University, Ames 50011.

Journal of Animal Science
|September 1, 1991
PubMed
Summary
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The National Sheep Improvement Program (NSIP) established uniform guidelines and a processing center for U.S. sheep producers. This program utilizes BLUP procedures for genetic evaluations of 12 economically important traits.

Area of Science:

  • Animal Science
  • Genetics
  • Agricultural Economics

Background:

  • The U.S. sheep industry lacked a unified genetic improvement program.
  • Need for standardized performance recording and genetic evaluation across diverse flocks.

Purpose of the Study:

  • To establish the National Sheep Improvement Program (NSIP) for U.S. sheep producers.
  • To define uniform performance guidelines and develop a centralized record processing system.
  • To implement genetic evaluations for economically important sheep traits.

Main Methods:

  • Defined 12 traits of economic importance: reproductive, growth, and wool traits.
  • Developed a records processing center with performance recording materials and software.
  • Utilized Best Linear Unbiased Prediction (BLUP) procedures for genetic evaluations.

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Main Results:

  • Completed a 3-year Phase I project by February 1990.
  • Enrolled both purebred and commercial sheep flocks.
  • Currently conducting within-flock genetic evaluations, with plans for across-flock evaluations.

Conclusions:

  • The NSIP provides a framework for systematic genetic improvement in the U.S. sheep industry.
  • Genetic merit is communicated through Expected Progeny Differences (EPDs).
  • The program aims to enhance productivity and economic value in sheep production.