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Relationship between Transferrin type and Productive Traits in Beef Steers^{1, 2,}

University of Saskatchewan, Saskatoon, Saskatchewan, Canada

Abstract

Blood serum transferrin types of 763 beef steers were determined by starch gel electrophoresis. Because the steers were on different feedlot treatments, their records were analyzed by the least squares method to estimate possible relationships between transferrin type and productive traits in beef steers. The analysis showed that there was neither a significant relationship between transferrin type and gain in the feedlot, nor between transferrin type and carcass characteristics.

Estimates of gene frequencies for different transferrin alleles in Hereford cattle based on serum types of 618 animals were 47.98, 11.97, 39.33 and 0.72% for Tf^A, Tf^D1, Tf^D2 and Tf^E, respectively. There were some discrepancies between the observed and expected frequencies among different types, but the differences were not significant.

¹ Financial support was provided by the National Research Council of Canada.

² The authors express appreciation to F. K. Kristjansson, Genetics Section, Animal Research Institute, Ottawa, for providing sera of standard transferrin types and to W. T. Magee, Michigan State University, East Lansing, for advice on statistical analysis of the data.

³ National Research Council of Canada Postdoctorate Fellow.

⁴ Permanent address: Department of Animal Scicences, College of Agriculture, University of Pahlavi, Shiraz, Iran.

⁵ Department of Animal Science.