Impact of Contemporary Group Assignment on Sire Means in Feed Efficiency Testing

dc.contributor.author Strohbehn, Daryl
dc.contributor.author Dahlke, Garland
dc.date 2018-08-25T22:28:46.000
dc.date.accessioned 2020-06-29T23:31:44Z
dc.date.available 2020-06-29T23:31:44Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2009
dc.date.issued 2009-01-01
dc.description.abstract <p>Designating correct contemporary groupings is important in reporting performance traits in beef cattle performance programs. An analysis of 166 bulls over a three-year period showed that grouping all cattle into one contemporary group each year lead to major errors in evaluating sires for their average feed intake, feed conversion and residual feed intake (RFI). Under this grouping strategy, sire progeny averages were estimated incorrectly; 58% of sire averages for dry matter intake were off by .5 lbs daily or more, 25% were off by .5 lbs or more in feed conversion and 67% were off by .5 lb or more for RFI. Also 25%, 29% and 33% were estimated with the wrong sign for dry matter intake, feed:gain ratio and RFI, respectively, which means sire progeny averages either received a positive sign for the trait rather than negative, or vice versa.</p>
dc.identifier archive/lib.dr.iastate.edu/ans_air/vol655/iss1/21/
dc.identifier.articleid 1438
dc.identifier.contextkey 3390269
dc.identifier.doi https://doi.org/10.31274/ans_air-180814-531
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ans_air/vol655/iss1/21
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/8570
dc.language.iso en
dc.relation.ispartofseries Animal Science Research Reports
dc.relation.ispartofseries ASL R2398
dc.source.bitstream archive/lib.dr.iastate.edu/ans_air/vol655/iss1/21/R2398.pdf|||Fri Jan 14 22:31:14 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Animal Sciences
dc.subject.disciplines Beef Science
dc.subject.keywords ASL R2398
dc.title Impact of Contemporary Group Assignment on Sire Means in Feed Efficiency Testing
dc.type article
dc.type.genre beef
dspace.entity.type Publication
relation.isJournalIssueOfPublication 3d9dfb75-1750-45f7-a559-dc2c94d08a2e
relation.isSeriesOfPublication 7f3839b7-b833-4418-a6fa-adda2b23950a
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