ERA

Download the full-sized PDF of Effects of Selection for Low Residual Feed Intake on Meat Quality of Major Muscles from Angus, Charolais and Kinsella Composite CattleDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3251G02B

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Effects of Selection for Low Residual Feed Intake on Meat Quality of Major Muscles from Angus, Charolais and Kinsella Composite Cattle Open Access

Descriptions

Other title
Subject/Keyword
Residual feed intake
Trained panel
Feed efficiency
Consumer sensory analysis
Preference mapping
Generalized Procrustes Analysis
Meat quality
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Jiu, Zhiqiang
Supervisor and department
Wendy Wismer (Department of Agricultural, Food and Nutritional Science)
Heather Bruce (Department of Agricultural, Food and Nutritional Science)
Examining committee member and department
Lynn McMullen (Department of Agricultural, Food and Nutritional Science)
Wendy Wismer (Department of Agricultural, Food and Nutritional Science)
Heather Bruce (Department of Agricultural, Food and Nutritional Science)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization
Food Science and Technology
Date accepted
2017-08-29T11:47:15Z
Graduation date
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
Residual feed intake (RFI) is a measure of animal feeding efficiency. Selection of high feed efficient cattle using RFI does not affect production performance; low RFI animals consume less feed to reach a similar body weight gain as high RFI animals and thus are considered as feed efficient cattle. However, reducing production costs by selecting low RFI cattle will be beneficial only if beef quality of efficient animals is not adversely affected. Moreover, the response of different beef breeds or crossbred cattle to RFI selection may not be consistent. Therefore, the main objective of this research was to determine the effects of breed and RFI on carcass quality, objective meat quality and sensory palatability of five major beef muscles: m.longissimus lumborum (LL), m.longissimus thoracis (LT), m.triceps brachii (TB), m.semimembranosus (SM) and m.gluteus medius (GM). Twelve high and twelve low feed efficient Angus, Charolais and Kinsella Composite cattle were selected for this study. RFI selection had limited influence on performance traits, carcass quality, instrumental meat quality, sensory palatability assessed by a trained panel and a consumer panel, with some exceptions. RFI selection for feed efficient animals negatively affected consumer acceptability of ribeye steaks from Angus and Kinsella Composite and sensory quality of TB for all breeds. Moreover, the interaction between breed, RFI and postmortem aging showed that post-mortem aging did not improve tenderness of ribeye steaks from low RFI animals of any breed, thus breeding for feed efficient animals using RFI selection may affect meat quality and consumer preference of steaks from some beef muscles. Breed significantly affected most traits assessed in this study; steaks from Angus had better meat sensory quality assessed by both trained and consumer panels, while Charolais had better yield quality with greater hot carcass weight, carcass ribeye area and lean meat yield. The interaction between breed and RFI selection showed that the effects of RFI on meat quality was not consistent among breeds. Therefore, RFI may be a beneficial tool to reduce feed costs by selecting feed efficient animals, but it had possible adverse influence on quality and consumer preference of meat in some breeds.
Language
English
DOI
doi:10.7939/R3251G02B
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2017-08-29T17:47:16.473+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (PDF/X)
Mime type: application/pdf
File size: 3207463
Last modified: 2017:11:08 16:53:12-07:00
Filename: Jiu_Zhiqiang_201708_Master.pdf
Original checksum: ab8f281bb5834376cb06643ee81722fe
Activity of users you follow
User Activity Date