Comparison of different traits to evaluate the growth of bulls

PŘIBYL, Josef, PŘIBYLOVÁ, Jana, KREJČOVÁ, Hana a MIELENZ, N. Comparison of different traits to evaluate the growth of bulls. Czech Journal of Animal Science, 2008, 53, 273-283. ISSN 1212-1819.
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The live weights at 400 days of age and gains from 100-400 days of age of performance-tested bulls were analysed at various monthly intervals. Estimates of variance components differed depending on the trait definition and model of analysis. Determinations of breeding values ranged from 0.64 to 0.94. Growth of animals according to daily gains in short consecutive intervals evaluation was preferred because more animals and more observations per animal were included in the evaluations, and the growth curve was separated into genetic and non-genetic parts. Simple evaluation of growth according to the final weight or daily gain in a long interval is not entirely correct, since environmental compensatory growth can occur.

OdděleníGenetika a šlechtění hospodářských zvířat