HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kraeling, R. R. Articles by Young, E. P. Search for Related Content PubMed PubMed Citation Articles by Kraeling, R. R. Articles by Young, E. P.

Transferrin and Pre-Albumin Polymorphisms in Swine Selected for Backfat Thickness

U. S. Department of Agriculture 20705 and University of Maryland 20740

Abstract

Polyacrylamide gel electrophoresis was used to phenotype serum transferrins (Tf) and pre-albumins (Pa) in 84 sows, 44 boars and 538 progeny of Duroc and Yorkshire swine selected for backfat thickness for 11 and nine generations, respectively. Each breed group consisted of high-fat, low-fat and control lines. The parents and 401 progeny were probed for backfat thickness at 77.3 to 81.8 kilograms. The Duroc gene frequencies were Tf^A, 0.000; Tf^B, 0.996; Tf^C, 0.004; Pa^A, 0.49; Pa^B, 0.51. The Yorkshire gene frequencies were Tf^A, 0.45; Tf^B, 0.55; Tf^C, 0.00; Pa^A, 0.98; Pa^B, 0.02. The observed phenotypic distributions did not deviate from that expected by segregation analysis. There was no significant (P>.05) difference in backfat thickness between pre-albumin phenotypes in the Duroc group or between transferrin phenotypes in the Yorkshire group by a least squares analysis of variance.

¹ Animal Science Research Division, A.R.S., Beltsville, Maryland 20705.

² Animal Science Department, University of Maryland. College Park 20740.

³ The authors wish to express appreciation to Dr. F. K. Kristjansson for supplying reference samples of swine serum, and to Dr. H. O. Hetzer and Dr. C. A. Kiddy for their suggestions in preparing this manuscript.