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Genetic, phenotypic and environmental correlations among performance traits estimated from Limousin field data
Journal of Animal Science
|January 1, 1982
Summary
Genetic correlations among Limousin cattle growth traits were analyzed. Birth weight positively influenced most growth measures, but negatively impacted pre- and postweaning relative growth, indicating complex genetic relationships.
Area of Science:
- Animal Genetics
- Quantitative Genetics
- Beef Cattle Production
Background:
- Understanding genetic correlations is crucial for effective breeding programs in beef cattle.
- Performance traits in Limousin cattle are influenced by genetic, phenotypic, and environmental factors.
- Previous research has explored growth trait correlations, but specific relationships in Limousin populations require detailed analysis.
Purpose of the Study:
- To estimate genetic, phenotypic, and environmental correlations among key performance traits in North American Limousin cattle.
- To identify genetic relationships between birth weight and various measures of growth.
- To elucidate the genetic associations between pre- and postweaning relative growth and other performance indicators.
Main Methods:
- Utilized field records from the North American Limousin Foundation performance testing program.
- Analyzed three distinct data sets for correlation estimation.
- Calculated genetic, phenotypic, and environmental correlations for traits including birth weight, weaning weight, yearling weight, and relative growth.
Main Results:
- Birth weight exhibited a positive genetic correlation with most growth traits, except for pre- and postweaning relative growth.
- A small, negative genetic relationship was observed between preweaning relative growth and birth weight.
- Postweaning relative growth showed negative genetic associations with preweaning average daily gain and adjusted 205-day weight.
Conclusions:
- Genetic correlations among Limousin cattle growth traits are complex and vary depending on the specific measures used.
- Breeding strategies should consider the negative genetic associations between relative growth traits and traditional growth measures to optimize overall performance.
- The findings provide valuable insights for genetic selection aimed at improving growth efficiency in Limousin beef cattle.