Differences among Beefmaster sires in their offspring in birth, growth and carcass traits
Date
2002
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Texas A&M University
Abstract
The Beefmaster Breeders United, in cooperation with Texas A&M University, coordinated an effort to evaluate the birth, growth and carcass traits of the progeny of Beefmaster sires. Traits evaluated were birth weight, weaning weight, yearling weight, final weight, hot carcass weight, longissimus muscle area (ribeye area), internal fat percentage (KPH), USDA yield grade, marbling score, USDA quality grade and Warner-Bratzler shear force values for the postmortem aging period of 14 days. Angus cows were randomly bred by artificial insemination to 15 different Beefmaster sires over a four-year period. The first calvings were in spring of 1998 and the last calves were born in spring of 2001. A total of 258 calves have been evaluated for birth weight and growth traits, but carcass traits are reported for only a total of 179 in this study, because the calves born in 2001 will not be slaughtered until later this year. The average birth weight, weaning weight, yearling weight, and final weight were 37.38 ± 0.26 kg, 220.40 ± 1.68 kg, 398.57 ± 7.03 kg, and 471.46 ± 8.89 kg, respectively. The carcass traits averaged 290.38 ± 2.36 kg, 74.175 ± .624 cm², 2.51 ± 0.04 %, 525.90 ± 6.91, 3.22 ± 0.06, respectively, for hot carcass weight, longissimus muscle area (ribeye area), internal fat percentage (KPH), marbling score, yield grade as calculated according to the USDA yield grade equation. The average Warner-Bratzler shear force value across all the carcasses was 2.92 ± 0.05 kg.
Description
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Includes bibliographical references (leaves 87-92).
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references (leaves 87-92).
Issued also on microfiche from Lange Micrographics.
Keywords
animal science., Major animal science.