Title page for ETD etd-11172012-040109

Type of Document Master's Thesis
Author Meacham, Nancy S.
URN etd-11172012-040109
Title Heritability estimates for calving date in Simmental cattle
Degree Master of Science
Department Animal Science
Advisory Committee
Advisor Name Title
Notter, David R. Committee Chair
Beal, W. E. Committee Member
Gerken, H. J. Jr. Committee Member
Marlowe, Thomas J. Committee Member
Pearson, Ronald E. Committee Member
  • Simmental cattle
Date of Defense 1987-05-15
Availability restricted

Variation among sires in daughters' reproductive performance was analyzed using data on 4,360 cows from nine herds obtained from the American Simmental Association. Cows were required to have at least 50% Simmental breeding, to have calved first at 2 yr of age and to have been born and subsequently calved in the same herd and season. Traits analyzed included first and second calving dates, first calving interval and the percentage of cows that returned to calve in the same season as 3-yr-olds. Data were adjusted for effects of percentage Simmental and I first—ca1f calving ease score.

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