Genotype by region and season interactions on weaning weight in United States Angus cattle

Journal of Animal Science
J L WilliamsI Misztal

Abstract

The objective of this study was to determine if weaning weight performance is genetically consistent across different environments in the United States. The American Angus Association provided weight and pedigree data. Weaning weights observed in the Southeast (SoE) and Northwest (NW) were the focus of this study, as these regions are perceived as opposite extremes in climate. The 2 most represented calving seasons in each region were fall and winter in the SoE and winter and spring in the NW. The original data were edited to remove weaning weight records outside of 3 SD from the respective region-season mean, contemporary groups smaller than 20, and single-sire contemporary groups. The final dataset included 884,465 weaning weight records with 64,907 from fall-born calves in the SoE, 74,820 from winter-born calves in the SoE, 346,724 from winter-born calves in the NW and 398,014 from spring-born calves in the NW. Weaning weights of calves born in different region-season classes adjusted to 205 d of age were considered different but genetically correlated traits in a multivariate analysis. The sole fixed effect was weaning contemporary group and random effects included direct, maternal, maternal permanent environment, and a res...Continue Reading

References

Dec 1, 1984·Journal of Animal Science·M W TessO W Robison
Nov 7, 2006·Journal of Animal Science·S E SpeidelD J Garrick
Jul 5, 2007·Journal of Animal Science·R C WatermanM D MacNeil

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Citations

Mar 9, 2013·Tropical Animal Health and Production·Luis A Saavedra-JiménezAgustín Ruíz-Flores
Jan 13, 2016·Animal : an International Journal of Animal Bioscience·M M OliveiraF F Cardoso
Feb 1, 2018·Journal of Animal Science·Dennis J FennewaldWilliam R Lamberson
Nov 27, 2019·Journal of Animal Science·Jose S Delgadillo LiberonaDavid G Riley
Apr 6, 2017·Journal of Animal Science·D J FennewaldW R Lamberson

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