Estimation of Genetic Parameters for the Protein Profile in Danish Holstein Milk

TY - CONF

T1 - Estimation of Genetic Parameters for the Protein Profile in Danish Holstein Milk

AU - Buitenhuis, Albert Johannes

AU - Poulsen, Nina Aagaard

AU - Larsen, Lotte Bach

N1 - Conference code: 10th

PY - 2014/8/17

Y1 - 2014/8/17

N2 - Seven protein traits were measured in bovine milk by LC-MS using samples from 370 animals: Protein%, casein (CN)%, κ-CN%, αs 1-CN%, αs 2-CN%, β-CN%, β-lactoglobulin (β-LG%) and α-lactalbumin (α-LA%). A genomic relationship matrix calculated based on the HD SNP information of these animals was used in the univariate and bivariate analysis of the protein traits. Hertitabilities ranged from 0.77 for κ-CN% to 0 for αs 1-CN% (SE: 0.13-0.21). The genetic correlation between β-CN and κ-CN was low (0.01 ± 0.53) whereas the genetic correlation of αs 2-CN with both β-CN and κ-CN was high (< -0.90). Furthermore α-LA% and β-LG% were highly correlated (0.71 ± 0.14) and had a low correlation to CN% (0.08 ± 0.25; -0.08 ± 0.30, respectively). In this study κ-CN% and the whey proteins showed a high heritability whereas αs 1-CN%, αs 2-CN% and β-CN% showed a low heritability in Danish Holstein cattle

AB - Seven protein traits were measured in bovine milk by LC-MS using samples from 370 animals: Protein%, casein (CN)%, κ-CN%, αs 1-CN%, αs 2-CN%, β-CN%, β-lactoglobulin (β-LG%) and α-lactalbumin (α-LA%). A genomic relationship matrix calculated based on the HD SNP information of these animals was used in the univariate and bivariate analysis of the protein traits. Hertitabilities ranged from 0.77 for κ-CN% to 0 for αs 1-CN% (SE: 0.13-0.21). The genetic correlation between β-CN and κ-CN was low (0.01 ± 0.53) whereas the genetic correlation of αs 2-CN with both β-CN and κ-CN was high (< -0.90). Furthermore α-LA% and β-LG% were highly correlated (0.71 ± 0.14) and had a low correlation to CN% (0.08 ± 0.25; -0.08 ± 0.30, respectively). In this study κ-CN% and the whey proteins showed a high heritability whereas αs 1-CN%, αs 2-CN% and β-CN% showed a low heritability in Danish Holstein cattle

KW - Dairy cattle

KW - Protein profile

KW - Genetic parameters

M3 - Paper

T2 - 10th World Congress on Genetics Applied to Livestock Production (WCGALP)

Y2 - 17 August 2014 through 22 August 2014

ER -