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 Wilson, D. E. Articles by Willham, R. L. Search for Related Content PubMed PubMed Citation Articles by Wilson, D. E. Articles by Willham, R. L.

Within-Herd Phenotypic, Genetic and Environmental Trend Lines for Beef Cattle Breeders¹

Iowa State University, Ames 50011

Abstract

Computational procedures were developed to compute within-herd phenotypic, genetic and environmental trend lines on a breed-wide basis by using best linear unbiased estimates of fixed effects and predictors of random sire and dam genetic effects. Procedures were demonstrated by using weaning weight performance records from 20 herds participating in the American Angus Herd Improvement Program. Current evaluation procedures used by several beef breed associations make it possible to provide such information to breeders on a routine basis, along with within-herd breeding values. The within-herd genetic trends are relative to the national genetic evaluation base. Procedures are summarized in addition to presentation of within-herd trend lines for four of the 20 herds, demonstrating the utility of such information to breeders, along with a discussion of several alternative presentation formats.

¹ Journal Paper No. J-12169 of the Iowa Agr. and Home Econ. Exp. Sta., Ames, Project No. 2000. This research was funded in part by a grant from the Amer. Angus Assoc., St. Joseph, MO.