Heifers sired by bulls with either high or low expected progeny differences (EPDs) for marbling do not differ in age at puberty

E. G M Bergfeld, R. J. Rasby, Merlyn K Nielsen, J. E. Kinder

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Selection for carcass traits such as deposition of intramuscular fat (marbling), which is a primary trait used as an indicator of meat quality, may incur additional effects such as younger age at puberty. Therefore, a trial was conducted for 2 years to determine age of puberty for two groups of crossbred heifers (n = 124) sired by purebred Angus bulls selected for either low (Low, n = 6) or high (High, n = 6) expected progeny differences (EPDs) for marbling. Our working hypothesis was that age at puberty would be reduced in heifers sired by bulls with high EPDs for marbling in comparison to those heifers sired by bulls with low EPDs for marbling. Puberty was determined by collecting weekly blood samples and assaying for concentrations of progesterone. Mean age at puberty for heifers during the study did not differ (392 ± 5 and 387 ± 5 days, Low and High respectively). Of the 124 heifers, 79% reached puberty within the 145 days allotted for the study. We conclude that use of sires that produce daughters with increased ability to marble does not result in decreased age at puberty.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalAnimal Reproduction Science
Volume40
Issue number4
DOIs
StatePublished - Jan 1 1995

Fingerprint

marbling
puberty
Puberty
heifers
bulls
Calcium Carbonate
intramuscular fat
purebreds
Angus
carcass characteristics
Meat
meat quality
sires
Progesterone
progesterone
crossbreds
Fats
blood

Keywords

  • Cattle-puberty
  • Genetics
  • Marbling

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Endocrinology
  • Food Animals
  • Biotechnology
  • Genetics

Cite this

Heifers sired by bulls with either high or low expected progeny differences (EPDs) for marbling do not differ in age at puberty. / Bergfeld, E. G M; Rasby, R. J.; Nielsen, Merlyn K; Kinder, J. E.

In: Animal Reproduction Science, Vol. 40, No. 4, 01.01.1995, p. 253-259.

Research output: Contribution to journalArticle

Bergfeld, E. G M ; Rasby, R. J. ; Nielsen, Merlyn K ; Kinder, J. E. / Heifers sired by bulls with either high or low expected progeny differences (EPDs) for marbling do not differ in age at puberty. In: Animal Reproduction Science. 1995 ; Vol. 40, No. 4. pp. 253-259.
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