Genetic parameters for fertility traits assessed in herds divergent in milk energy output in Holstein-Friesian, Brown Swiss, and Simmental cattle

Journal of Dairy Science
M Martinez-CastilleroA Cecchinato

Abstract

In this study, we aimed to investigate differences in the genetics of fertility traits (heritability of traits and correlations between traits in divergent environments) in dairy cows of different production levels defined on the basis of the herd-average daily milk energy output (herd-dMEO). Data were obtained from Holstein-Friesian (n = 37,359 for fertility traits, 381,334 for dMEO), Brown Swiss (n = 79,638 for fertility traits, 665,697 for dMEO), and Simmental cows (n = 63,048 for fertility traits, 448,445 for dMEO) reared in northeastern Italy. Fertility traits under study were interval from calving to first service, interval from first service to conception, days open, calving interval, calving rate, and nonreturn rate at d 56. We classified herds into low and high productivity based on the herd-average dMEO (inferred using mixed effects models). We estimated genetic parameters using Bayesian bivariate animal models, where expressions of a phenotype in the low and high dMEO herds were taken as being different-albeit correlated-traits. Fertility traits were more favorable in Simmental than in Holstein-Friesian cows, whereas for all traits, Holstein-Friesian had the highest estimates of intraherd heritability [ranging from 0...Continue Reading

References

Feb 5, 2000·Journal of Dairy Science·M J de Vries, R F Veerkamp
Jan 2, 2001·Journal of Dairy Science·C N CostaS R Searle
Mar 5, 2003·Journal of Dairy Science·P J BoettcherM M Schutz
Aug 19, 2005·Journal of Dairy Science·O González-Recio, R Alenda
Feb 16, 2015·Journal of Dairy Science·N A PoulsenL B Larsen
Nov 21, 2017·Journal of Dairy Science·Filippo MigliorChristine F Baes
Jul 8, 2019·Journal of Dairy Science·Kirsi MuuttorantaMartin H Lidauer

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Citations

Jan 19, 2021·Journal of Dairy Science·H Toledo-AlvaradoA I Vazquez
Jun 21, 2021·Journal of Dairy Science·Maria Martinez-CastilleroAlessio Cecchinato

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