scholarly journals Polymorphisms in the growth hormone and insulin-like growth factor 1 genes are associated with milk production, somatic cell count, and survival in Holstein-Friesian dairy cattle

2010 ◽  
Vol 1 (1) ◽  
pp. 212-212
Author(s):  
M.P. Mullen ◽  
S.M. Waters ◽  
D.J. Howard ◽  
C.O. Lynch ◽  
M.G. Diskin ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Growth Factor ◽  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Somatic Cell Count ◽  
Insulin Like Growth Factor ◽  
Holstein Friesian

scholarly journals Estimation of Inheritabilities from Holstein-Friesian Test Day Data in Hungary

2007 ◽  
pp. 23-25
Author(s):  
Szilárd Márkus ◽  
László Bognár ◽  
István Fazekas ◽  
Béla Béri ◽  
István Komlósi
Keyword(s):  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Somatic Cell Count ◽  
Protein Production ◽  
Holstein Friesian ◽  
Regression Test ◽  
Main Disadvantage ◽  
Computational Requirement

Recently, test day models (TDM) began to be increasingly used for the genetic evaluation of dairy cattle. The main advantage of the TDM compared with the 305 days lactation yield models is that more effects can be used in the evaluation. Therefore, the TDM is more accurate than the lactation models. The main disadvantage is the increased computational requirement, but this can be offset by improvements in computer capabilities.The topic of this paper is the use of a fix regression test day model to estimate the inheritabilities of test day data from Hungarian Holstein-Friesian dairy cattle. The inheritability was 0.26 for milk production, 0.2 for fat production, 0.24 for protein production and 0.06 for the somatic cell count.

scholarly journals Polymorphisms in bovine immune genes and their associations with somatic cell count and milk production in dairy cattle

BMC Genetics ◽  
2010 ◽  
Vol 11 (1) ◽  
pp. 99 ◽  
Author(s):  
Christine Beecher ◽  
Mairead Daly ◽  
Stuart Childs ◽  
Donagh P Berry ◽  
David A Magee ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Somatic Cell Count ◽  
Immune Genes

scholarly journals Efficacy of clinoptilolite supplementation on milk yield and somatic cell count

2014 ◽  
pp. 4242-4248 ◽  
Author(s):  
Deniz Alic Ural
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Somatic Cell Count ◽  
Basal Diet ◽  
Soy Flour ◽  
Control Group ◽  
Mean Values ◽  
Holstein Friesian ◽  
Barley Grains

ABSTRACTObjective. To determine the efficiency of clinoptilolite supplements on milk production and somatic cell count (SCC). Materials and methods. 80 Holstein–Friesian cows were used, between 2 and 4 years of age ad between their first and third lactation. Two groups made up of 40 animals were constituted, and one of the following treatments were assigned randomly: Control group (n=40) with a basal diet, and experimental group (Clinoptilolite; n=40) with a basal diet + 3% (p/p) of clinoptilolite. The basal diet consisted of corn, hay, sunflower flour, barley grains, wheat bran and soy flour. The experiment lasted 16 weeks (February to June 2013) and began 4 weeks before the expected delivery date. 2560 milk samples were taken (morning and evening), and the farm was visited twice a week. Results. The mean values for the control group and the clinoptilolite group were 30.63±0.851 and 33.66±0.756, respectively. Milk prouction for the clinoptilolite group was higher than that of the control group (p<0.01). SCC for the control and clinoptilolite groups was 5.06±0.045 and 4.79±0.011, respectively (p<0.01). Conclusions. Supplementing with 3% (p/p) clinoptilolite in dairy cows increases milk production and decreases somatic cell count.

Inbreeding and inbreeding depression in Irish Holstein-Friesian cattle

2007 ◽  
Vol 2007 ◽  
pp. 63-63
Author(s):  
S. Mc Parland ◽  
J.F. Kearney ◽  
M. Rath ◽  
D.P. Berry
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Inbreeding Depression ◽  
Milk Fat ◽  
Somatic Cell Count ◽  
Protein Production ◽  
Holstein Friesian ◽  
Related Individuals ◽  
Friesian Cattle

Inbreeding occurs when related individuals are mated to each other. Inbreeding reduces milk production, and impairs health, fertility and survival; a phenomenon known as inbreeding depression. Smith et al. (1998) reported losses in milk yield of 27 kg per 1% increase in inbreeding in US Holsteins. The objective of this study was to investigate the level of inbreeding in Irish Holstein-Friesian cattle and to quantify its effect on milk, fat and protein production and somatic cell count.

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