Genetic associations of growth and lactation curve components in polled Hereford cattle

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dc.contributor.author Glaze, J.B. Jr.
dc.contributor.author Schalles, R.R.
dc.date 1999 en
dc.date.accessioned 2010-08-23T19:34:27Z
dc.date.available 2010-08-23T19:34:27Z
dc.date.issued 2010-08-23T19:34:27Z
dc.identifier.uri http://hdl.handle.net/2097/4712
dc.description.abstract Weight and milk production records of Polled Hereford cows born from 1967 to 1979 were used to fit growth and lactation curves. A multiple-trait, derivative-free, restricted maximum likelihood (MTDFREML) procedure, utilizing a full animal model, was used to estimate variances and covariances for the components of the growth and lactation curves. For the growth curve, W=A+B(1-e-kt) components A, B, and k each had moderate to high heritabilities ranging from .35 to .72. The genetic correlation between growth curve components A and B was positive (.42), whereas the genetic correlations between A and K (-.34) and between B and K (-.74) were negative. In the lactation curve, Yn=n/(aekm) heritabilities of components k and a were .15 and .40, respectively. The genetic correlation between these lactation curve components was -.78. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1999 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 99-339-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 831 en_US
dc.subject Beef en_US
dc.subject Growth curve en_US
dc.subject Lactation curve en_US
dc.subject Heritability en_US
dc.subject Genetic correlation en_US
dc.subject Polled Hereford en_US
dc.title Genetic associations of growth and lactation curve components in polled Hereford cattle en_US
dc.type Conference paper en_US
dc.date.published 1999 en_US
dc.citation.epage 72 en_US
dc.citation.spage 71 en_US
dc.description.conference Cattlemen's Day, 1999, Kansas State University, Manhattan, KS, March 5, 1999 en_US


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