Expected Progeny Difference (EPD)



The selection of the herd bull is one of the most important decisions the cattle breeder makes. A major advancement in the improvement of the beef industry has been the development of sire summaries. Sire summaries provide information on traits that are economically important to cattle producers. Each calf produced receives one-half of its genetic makeup from its sire, so we will learn how to use EPD's to select traits that are desirable and economically profitable based on real life ranch scenarios.

Lesson Time

One class period
55 Minutes

Industries / Subjects / Grades

Industries / Pathways
  • Agriculture & Natural Resources Agriculture & Natural Resources

Standards and Objectives


California Academic Content Standards (3)
California's 2008 CTE Standards (7)

Related Instructional Objectives (SWBAT...)

  • Be able to read and interpret a ranch scenario and understand how EPD's apply to terminal sire selection.
  • Evaluate a group of animals for desired qualities and discern among them for breeding selection.
  • Understand how to use animal performance data in the selection and management of production animals.
  • Apply appropriate problem-solving strategies and critical thinking skills to work-related issues and tasks.

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