Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Animal Science

First Advisor

Tom Baas

Second Advisor

Ken Stalder

Third Advisor

Ted Bailey

Abstract

A study was conducted to evaluate differences in performance, carcass traits, and tissue deposition rates among breeds of swine entered in the 2003 National Barrow Show Progeny Test. The test consisted of 362 barrow and gilt progeny from sires within each of the 8 breeds evaluated. Breeds tested were Berkshire (n = 158), Duroc (n = 76), Chester White (n = 53), Yorkshire (n= 31), Spotted (n = 15), Landrace (n = 15), Poland (n = 8), and Hampshire (n = 6). Due to small sample size, the Spotted, Landrace, Poland, and Hampshire breeds were combined in an All Other Breeds (AOB) category. Progeny were weighed and scanned beginning at a group mean body weight of approximately 64 kg., while off-test measurements were taken at approximately 109 kg. Deposition rates were estimated for 10th rib loin muscle area, 10th rib off-midline backfat, and intramuscular fat percentage of the longissimus dorsi.

DOI

https://doi.org/10.31274/rtd-180813-16609

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Bryce David Martin

Language

en

Proquest ID

AAI1454676

OCLC Number

263684437

ISBN

9780549686873

File Format

application/pdf

File Size

63 pages

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