Carcass merit traits: development of EPDS for Warner-Bratzler shear force and DNA marker validation

Kansas Agricultural Experiment Station Research Reports, Dec 2001

Warner-Bratzler shear force data on strip loin steaks were obtained on 761 steers from contemporary groups of progeny from the most popular 38 Simmental sires, and 133 steers from nine Simbrah sires. The range for Warner-Bratzler shear force EPDs for the Simmental sires was from -0.51 lb (more tender) to +0.48 lb (less tender). The range in EPDs for the Simbrah sires was from -0.73 to +0.73 lb. In addition, DNA analyses and screening have been completed for 11 quantitative trait loci on several Simmental and Simbrah sires. Information from this project should allow cattle producers to improve carcass traits, tenderness, and other palatability traits through classical genetic selection or through DNA marker-assisted selection.

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Carcass merit traits: development of EPDS for Warner-Bratzler shear force and DNA marker validation

Kansas Agricultural Experiment Station Research Reports Carcass merit traits: development of EPDS for Warner-Bratzler shear force and DNA marker validation E.J. Pollak 0 E.A. Westcott 0 Pollak , E.J.; Lipsey, R.J.; Westcott, E.A.; Dikeman, Michael E.; and Stroda, Sally L. (2001) "Carcass merit Recommended Citation traits: development of EPDS for Warner-Bratzler shear force and DNA marker validation," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss. 1. https://doi.org/10.4148/2378-5977.1714 See next page for additional authors Follow this and additional works at: https://newprairiepress.org/kaesrr Part of the Other Animal Sciences Commons This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright 2001 Kansas State University Agricultural Experiment Station and Cooperative Extension Service. Contents of this publication may be freely reproduced for educational purposes. All other rights reserved. Brand names appearing in this publication are for product identification purposes only. No endorsement is intended, nor is criticism implied of similar products not mentioned. K-State Research and Extension is an equal opportunity provider and employer. Carcass merit traits: development of EPDS for Warner-Bratzler shear force and DNA marker validation Abstract Warner-Bratzler shear force data on strip loin steaks were obtained on 761 steers from contemporary groups of progeny from the most popular 38 Simmental sires, and 133 steers from nine Simbrah sires. The range for Warner-Bratzler shear force EPDs for the Simmental sires was from -0.51 lb (more tender) to +0.48 lb (less tender). The range in EPDs for the Simbrah sires was from -0.73 to +0.73 lb. In addition, DNA analyses and screening have been completed for 11 quantitative trait loci on several Simmental and Simbrah sires. Information from this project should allow cattle producers to improve carcass traits, tenderness, and other palatability traits through classical genetic selection or through DNA markerassisted selection. Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 License. Authors E.J. Pollak, R.J. Lipsey, E.A. Westcott, Michael E. Dikeman, and Sally L. Stroda This research report is available in Kansas Agricultural Experiment Station Research Reports: https://newprairiepress.org/kaesrr/vol0/iss1/311 Summary Warner-Bratzler shear force data on strip loin steaks were obtained on 761 steers from contemporary groups of progeny from the most popular 38 Simmental sires, and 133 steers from nine Simbrah sires. The range for Warner-Bratzler shear force EPDs for the Simmental sires was from -0.51 lb (more tender) to +0.48 lb (less tender). The range in EPDs for the Simbrah sires was from -0.73 to +0.73 lb. In addition, DNA analyses and screening have been completed for 11 quantitative trait loci on several Simmental and Simbrah sires. Information from this project should allow cattle producers to improve carcass traits, tenderness, and other palatability traits through classical genetic selection or through DNA marker-assisted selection. Introduction The Carcass Merit Project is described in the preceding article. The specific objective reported here was to measure longissimus muscle (strip loin steak) Warner-Bratzler shear force and to calculate EPDs based on 761 progeny from 38 Simmental sires and 133 progeny from nine Simbrah sires. Experimental Procedures Strip loin steaks were obtained from 761 progeny of the 38 most widely used Simmental sires and 133 progeny from nine of the most widely used Simbrah sires, both mated to commercial cows. Steaks were retrieved at the time of carcass data collection. One or more reference sires was used in each test herd. BIF guidelines for sire evaluation were followed. Steaks were vacuum packaged and aged at 33-37°F until 14 days postmortem. They were cooked in a Blodgett oven at 325°F to an endpoint temperature of 158°F. Eight ½-inch cores were removed and sheared on an Instron Universal Testing Machine using the Warner-Bratzler shear device. Researchers at Cornell University conducted the genetic evaluations and calculations of EPDs, using a heritability estimate of 30% for Warner-Bratzler shear force. Preliminary Results Table 1 lists Simmental and Simbrah sires that had seven or more progeny evaluated, their sire and maternal grandsire, their EPDs, the EPD accuracy, and the number of progeny slaughtered. The most tender Simmental sire had an EPD for Warner-Bratzler shear force of -0.51 lb and the least tender sire had an EPD of +0.48 lb. The most tender Simbrah sire had an EPD of -0.73 lb and the least tender, +0.73 lb. The accuracies are relatively low for some of the sires because of small progeny numbers. The differences in the accuracy values are somewhat analog (...truncated)


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E.J. Pollak, R.J. Lipsey, E.A. Westcott, Michael E. Dikeman, Sally L. Stroda. Carcass merit traits: development of EPDS for Warner-Bratzler shear force and DNA marker validation, Kansas Agricultural Experiment Station Research Reports, 2001, Issue 1,