scholarly journals Analysis of the genetic architecture of energy balance and its major determinants dry matter intake and energy-corrected milk yield in primiparous Holstein cows

2019 ◽  
Vol 102 (4) ◽  
pp. 3241-3253 ◽  
Author(s):  
N. Krattenmacher ◽  
G. Thaller ◽  
J. Tetens
Keyword(s):  
Energy Balance ◽  
Milk Yield ◽  
Genetic Architecture ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Holstein Cows

Influence of Cracked, Coarse Ground or Fine Ground Corn on Digestion, Dry Matter Intake and Milk Yield in Holstein Cows

2009 ◽  
Vol 35 (2) ◽  
pp. 149-154 ◽  
Author(s):  
A. Plascencia ◽  
V. M. González-Vizcarra ◽  
M. A. López-Soto ◽  
D. May ◽  
L. C. Pujol ◽  
...  
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Holstein Cows ◽  
Ground Corn

scholarly journals Dry Matter Intake, Milk Yield and Composition, and Nitrogen Use in Holstein Cows Fed Soybean, Fish, or Corn Gluten Meals

1991 ◽  
Vol 74 (5) ◽  
pp. 1609-1622 ◽  
Author(s):  
J.E. Wohlt ◽  
S.L. Chmiel ◽  
P.K. Zajac ◽  
L. Backer ◽  
D.B. Blethen ◽  
...  
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Holstein Cows ◽  
Nitrogen Use ◽  
Corn Gluten

scholarly journals Correlation between Blood Biochemical Metabolites Milk Yield, Dry Matter Intake and Energy Balance in Dairy Cows during Early and Mid Lactation

2017 ◽  
Vol 5 (2) ◽  
pp. 26-30 ◽  
Author(s):  
Radojica Djoković ◽  
Vladimir Kurćubić ◽  
Zoran Ilić ◽  
Marko Cincović ◽  
Miroslav Lalović ◽  
...  
Keyword(s):  
Energy Balance ◽  
Dairy Cows ◽  
Milk Yield ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Blood Biochemical

Association of leptin polymorphisms with milk yield, dry matter intake, energy balance, luteal activity and serum leptin levels during lactation in HF dairy cows

2002 ◽  
Vol 2002 ◽  
pp. 45-45
Author(s):  
S.C. Liefers ◽  
R.F. Veerkamp ◽  
M.F.W. te Pas ◽  
C. Delavaud ◽  
Y. Chilliard ◽  
...  
Keyword(s):  
Energy Balance ◽  
Dairy Cows ◽  
Milk Yield ◽  
Dry Matter ◽  
Gene Locus ◽  
Genetic Correlations ◽  
Live Weight ◽  
Late Pregnancy ◽  
Dry Matter Intake ◽  
Plasma Leptin

Since evidence is present that genetic correlations between start of luteal activity and energy balance, milk yield and live weight exist (Veerkamp et al., 2000), it could be hypothesised that polymorphisms at the leptin gene locus might play a role. The first objective of this study was to associate plasma leptin levels during late pregnancy with genetic differences in the leptin gene. The second objective was to relate these polymorphisms with variations in energy balance, milk production, dry matter intake and fertility.

Multi-trait covariance functions to estimate genetic correlations between milk yield, dry-matter intake and live weight during lactation

1999 ◽  
Vol 24 ◽  
pp. 147-151 ◽  
Author(s):  
R. F. Veerkamp ◽  
R. Thompson
Keyword(s):  
Energy Balance ◽  
Milk Yield ◽  
Fixed Effects ◽  
Dry Matter ◽  
Genetic Correlations ◽  
Live Weight ◽  
Random Regression ◽  
Dry Matter Intake ◽  
Covariance Functions ◽  
High Level

AbstractEnergy balance is a function of dry-matter intake (DMI), live weight and milk yield over a certain time period. To investigate potential strategies to use genetic selection for the improvement of the negative energy balance, genetic co-variances were estimated among DMI, live weight and milk yield during the first 15 weeks of lactation (no.=628). Rather than estimating the full 45 by 45 matrix a random regression model was used to estimate a second order covariance functions for the additive genetic and permanent environmental effects. Fixed effects were test-day, a group effect and week in lactation. Estimates for the genetic covariance function demonstrated that a high level of milk yield is only moderately correlated with a high level of DMI (0.21) but very strongly correlated to an increase of intake (0.97) and a loss of live weight (-0.46) during the first 15 weeks of lactation. Levels of weight and intake were correlated strongly (0.81). Estimates for the genetic correlations between weeks 1 and 15 were 0.79, 0.34 and 0.83 for milk yield, DMI and live weight respectively. DMI during early lactation was negatively correlated with milk yield but DMI during the later weeks was positively correlated with milk yield. The implication is that when selection is for a linear combination of milk yield, DMI and live weight (i.e. energy balance or efficiency) the moment in lactation of measuring each trait on the cow is of importance

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