Evidence of additive genetic variation for major milk proteins in dairy cows: A meta‐analysis

In the past, there have been reports of genetic parameters for milk proteins in various dairy cattle populations. The high variability among genetic parameter estimates has been caused by this. This study aimed to use a random‐effects meta‐analysis model to compile published estimates of genetic par...

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Bibliographic Details
Published in:Journal of animal breeding and genetics (1986) 2024-07, Vol.141 (4), p.379-389
Main Author: Ghavi Hossein‐Zadeh, Navid
Format: Article
Language:English
Subjects:
Animal fat
Animal populations
Casein
Cattle
Correlation
Cow's milk
Dairy cattle
dairy cow
Estimates
Genetic diversity
genetic parameter estimates
Genetic variability
Heritability
Lactalbumin
Lactoglobulin
Meta-analysis
Milk
Parameter estimation
Proteins
Sums
systematic review
Whey
Whey protein
β-Lactoglobulin
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Summary:In the past, there have been reports of genetic parameters for milk proteins in various dairy cattle populations. The high variability among genetic parameter estimates has been caused by this. This study aimed to use a random‐effects meta‐analysis model to compile published estimates of genetic parameter for major milk proteins of α‐lactalbumin, β‐lactoglobulin, sum of whey proteins, casein, αs1‐casein, αs2‐casein, β‐casein, and κ‐casein in dairy cows. The study used a total of 140 heritability and 256 genetic correlation estimates from 23 papers published between 2004 and 2022. The estimated range of milk protein heritability is from 0.284 (for α‐lactalbumin in milk) to 0.596 (for sum of whey proteins). The genetic correlation estimates between casein and milk yield, milk fat and protein percentages were −0.461, 0.693, and 0.976, respectively (p 
ISSN:0931-2668
1439-0388
DOI:10.1111/jbg.12850