Genetic parameters for docility, weaning weight, yearling weight, and intramuscular fat percentage in Hereford cattle

Journal of Animal Science
J A Torres-Vázquez, M L Spangler

Abstract

Cattle behavior, including measures of docility, is important to beef cattle producers not only from a human safety perspective but also due to potential correlations to economically relevant traits. Field data from the American Hereford Association was used to estimate genetic parameters for chute score (CS; = 25,037), weaning weight (WW; = 24,908), yearling weight (YW; = 23,978), and intramuscular fat percentage (IMF; = 12,566). Single-trait and bivariate animal models were used to estimate heritabilities and genetic correlations. All models included fixed effects of sex and contemporary group, defined as herd-year-season, and direct genetic and residual components were included as random effects. For CS and WW, additional random effects of maternal genetic and maternal permanent environment were also fitted. For CS, WW, YW, and IMF, heritability estimates were 0.27 ± 0.02, 0.35 ± 0.03, 0.36 ± 0.02, and 0.27 ± 0.02, respectively. Genetic correlations between CS and WW, CS and YW, CS and IMF, WW and YW, WW and IMF, and YW and IMF were -0.12 ± 0.06, -0.10 ± 0.05, -0.08 ± 0.06, 0.47 ± 0.05, -0.19 ± 0.09, and -0.41 ± 0.05, respectively. Heritability estimates for all traits suggest that they would respond favorably to selection a...Continue Reading

References

Oct 17, 2006·Journal of Animal Science·D W BeckmanD J Garrick
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Nov 10, 2009·Journal of Animal Science·M D MacNeilS L Northcutt
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Nov 7, 2014·Frontiers in Genetics·Marie J HaskellSimon P Turner

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Citations

May 8, 2018·Journal of Dairy Science·Heather W NeaveMarina A G von Keyserlingk
Aug 21, 2018·Journal of Animal Science·José Antonio Torres-VázquezSamuel A Clark

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