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Related Experiment Videos

Divergent selection for postweaning feed conversion in Angus beef cattle: I. Mean comparisons.

M D Bishop1, M E Davis, W R Harvey

  • 1Anim. Sci. Dept., Ohio State University, Columbus 43210.

Journal of Animal Science
|November 1, 1991
PubMed
Summary

Selecting bulls based on feed conversion genetics influences progeny growth and fat deposition. High feed conversion progeny showed increased weight gain and subcutaneous fat, indicating a genetic link to body composition.

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Life cycle efficiency of beef production: IX. Relationship between residual feed intake of heifers and cow efficiency ratios based on harvest, carcass, and wholesale cut weight outputs.

Journal of animal science·2018

Area of Science:

  • Animal Science
  • Genetics
  • Beef Cattle Production

Background:

  • Feed conversion efficiency is a critical trait in beef cattle production.
  • Understanding the genetic basis of feed conversion can improve breeding strategies.
  • Previous research has explored factors influencing feed efficiency in livestock.

Purpose of the Study:

  • To investigate the genetic influence of sire feed conversion on progeny performance.
  • To evaluate the impact of sire selection for feed conversion on growth and carcass traits.
  • To determine if genetic differences in feed conversion correlate with body composition.

Main Methods:

  • Angus bull calves were tested for feed conversion (feed:gain) over 140 days.
  • High and low feed conversion sires were randomly mated to cows over multiple years.

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  • Progeny performance (growth, feed intake, carcass traits) was evaluated in four replicates.

    • Main Results:

    • High feed conversion progeny exhibited significantly greater daily weight gain (0.09 kg/d).
    • Progeny from high feed conversion sires had increased subcutaneous fat at post-test and slaughter.
    • No significant differences were observed in other carcass traits between progeny groups.

    Conclusions:

    • Genetic selection for feed conversion impacts progeny growth rate and body composition.
    • High feed conversion genetics are associated with increased fat deposition in Angus cattle.
    • Further research may explore specific genes influencing feed efficiency and carcass traits.