Degree Type

Thesis

Date of Award

2009

Degree Name

Master of Science

Department

Animal Science

First Advisor

Anna K. Johnson

Abstract

The objectives of these studies were to determine the effect of selection for reduced residual feed intake (RFI) on activity, lesion scores and temperament in gilts. Purebred Yorkshire gilts were utilized (n=192). Half were from a line that had been selected for five generations for reduced RFI (LRFI) and half were from a randomly bred line, which served as a control (CRFI). On the day of placement there were no differences between the lines regarding general activity, however LRFI gilts had lower lesion scores. Over the trial, the LRFI gilts had lower overall activity, but lesions were not different between lines. The LRFI gilts scored lower during an initial temperament score. While both lines' temperament scores decreased over the trial, CRFI gilts had a greater percentage decrease and scored lower than the LRFI gilts by the end. Selection for reduced RFI reduced activity and did not detrimentally affect temperament.

DOI

https://doi.org/10.31274/etd-180810-3049

Copyright Owner

Larry J. Sadler

Language

en

Date Available

2012-04-29

File Format

application/pdf

File Size

89 pages

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