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Related Experiment Videos

Breed structure of Senepol cattle.

A R Williams1, H D Hupp, C E Thompson

  • 1Virgin Islands Agricultural Experiment Station, Kingshill.

The Journal of Heredity
|January 1, 1988
PubMed
Summary

Senepol cattle inbreeding levels remained low, averaging under 1.00%, and decreased with increased population size. Effective breeding programs and animal exchanges between farms maintained low inbreeding (F) and theoretical inbreeding (FT).

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Area of Science:

  • Animal Science
  • Genetics
  • Livestock Breeding

Background:

  • The Senepol breed's genetic structure is crucial for its sustainability and improvement.
  • Understanding inbreeding and coancestry is vital for managing small, isolated cattle populations.
  • Previous studies on Senepol genetics were limited in scope and population representation.

Purpose of the Study:

  • To establish the breed structure of Senepol cattle using historical breeding data.
  • To determine inbreeding coefficients (F) and coancestry relationships (rAB) within the Senepol population.
  • To analyze trends in inbreeding over time and their correlation with population size.

Main Methods:

  • Utilized comprehensive breeding records from two major Virgin Islands Senepol breeders (Annaly Farms and Castle Nugent Farm).
  • Calculated inbreeding (F), coancestry coefficients (rAB), and theoretical inbreeding (FT) from 1947 to 1984.
  • Examined data for family separation and analyzed the impact of population size on inbreeding trends.

Main Results:

  • Actual inbreeding (F) in the Senepol population was consistently low, averaging less than 1.00%.
  • Both inbreeding (F) and theoretical inbreeding (FT) decreased as population numbers increased.
  • Some evidence of family separation was observed within the Annaly Farms' dataset.

Conclusions:

  • The Senepol breed has maintained a low level of inbreeding through strategic breeding practices.
  • Population growth and inter-farm animal exchanges were key factors in managing genetic diversity.
  • The study confirms the effectiveness of the breeding programs in preventing excessive inbreeding.

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