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Related Concept Videos

Types of Selection01:46

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Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
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Related Experiment Video

Updated: May 3, 2026

Author Spotlight: Improving Beef Cattle Nutrition and Production with a Focus on Feed Efficiency and Meat Quality Traits Through Advanced Biochemical and Molecular Assays
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Bioeconomic model and selection indices in Aberdeen Angus cattle.

G S Campos1, J Braccini Neto, R P Oaigen

  • 1Department of Animal Production, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.

Journal of Animal Breeding and Genetics = Zeitschrift Fur Tierzuchtung Und Zuchtungsbiologie
|January 21, 2014
PubMed
Summary

This study developed a bioeconomic model for the Brazilian Aberdeen Angus breeding program, identifying number of calves weaned as the most profitable trait. Proposed selection indices aim to increase overall herd profitability for breeders.

Keywords:
Beef cattleeconomic weightproductionreproductionselection objectives

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Area of Science:

  • Animal Science
  • Agricultural Economics
  • Quantitative Genetics

Background:

  • Economic values for biological traits are crucial for optimizing breeding programs in full-cycle beef production systems.
  • The Brazilian Aberdeen Angus genetic breeding programme (PROMEBO) requires robust tools to assess trait profitability and guide selection strategies.

Purpose of the Study:

  • To develop a bioeconomic model for calculating economic values of biological traits.
  • To propose selection indices for the PROMEBO program based on economic impact.
  • To evaluate the influence of trait performance changes on production system profitability.

Main Methods:

  • A bioeconomic model was constructed to determine economic values for key biological traits.
  • Trait performance values were increased by 1% to simulate impact on profit.
  • Selection indices were formulated for weaning and 18-month stages, incorporating various traits.

Main Results:

  • Economic value for Number of Calves Weaned (NCW) was R$ 6.65/cow/year; Slaughter Weight (SW) was R$ 1.43/cow/year.
  • The weaning selection index prioritized body weight (44.77%), early maturing (30.36%), conformation (14.24%), and muscle development (10.63%).
  • The 18-month selection index heavily emphasized body weight (77.61%), followed by early maturing (11.09%) and conformation (4.99%).

Conclusions:

  • Number of Calves Weaned (NCW) has the highest economic impact, while Slaughter Weight (SW) also positively influences system economics.
  • The proposed selection indices provide a data-driven approach for breeders to enhance profitability.
  • Implementing these indices can lead to more efficient genetic improvement in Aberdeen Angus cattle.