Short communication: Multi-trait estimation of genetic parameters for milk protein composition in the Danish Holstein

Journal of Dairy Science
G GebreyesusA J Buitenhuis

Abstract

Genetic parameters were estimated for the major milk proteins using bivariate and multi-trait models based on genomic relationships between animals. The analyses included, apart from total protein percentage, αS1-casein (CN), αS2-CN, β-CN, κ-CN, α-lactalbumin, and β-lactoglobulin, as well as the posttranslational sub-forms of glycosylated κ-CN and αS1-CN-8P (phosphorylated). Standard errors of the estimates were used to compare the models. In total, 650 Danish Holstein cows across 4 parities and days in milk ranging from 9 to 481d were selected from 21 herds. The multi-trait model generally resulted in lower standard errors of heritability estimates, suggesting that genetic parameters can be estimated with high accuracy using multi-trait analyses with genomic relationships for scarcely recorded traits. The heritability estimates from the multi-trait model ranged from low (0.05 for β-CN) to high (0.78 for κ-CN). Genetic correlations between the milk proteins and the total milk protein percentage were generally low, suggesting the possibility to alter protein composition through selective breeding with little effect on total milk protein percentage.

References

Oct 24, 2008·Journal of Dairy Science·P M VanRaden
Feb 24, 2009·Journal of Dairy Science·G C B SchopenJ A M van Arendonk
Jul 7, 2011·Genetics, Selection, Evolution : GSE·Mario P L Calus, Roel F Veerkamp
Mar 3, 2012·G3 : Genes - Genomes - Genetics·Bryan HowieMatthew Stephens
Oct 2, 2012·Journal of Dairy Science·G BittanteA Cecchinato
Sep 10, 2014·Journal of Dairy Science·E BijlH Bovenhuis

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Citations

Feb 26, 2020·Animals : an Open Access Journal From MDPI·Lucio Flavio Macedo MotaAlessio Cecchinato
Jun 26, 2020·Animal : an International Journal of Animal Bioscience·J Lassen, G F Difford
Jul 19, 2020·Animals : an Open Access Journal From MDPI·Shymaa M El-KomyMohammed A El-Magd
May 31, 2019·Genetics, Selection, Evolution : GSE·Bart BuitenhuisNina A Poulsen
Aug 5, 2020·Journal of Dairy Science·C I V Manzanilla-PechJ Lassen
Jan 8, 2020·Animals : an Open Access Journal From MDPI·Fan YangYafei Cai
Mar 22, 2020·Journal of Dairy Science·Grum GebreyesusGoutam Sahana
Feb 29, 2020·Asian-Australasian Journal of Animal Sciences·Cong LiJuan J Loor

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