Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Medicine and Health Sciences
A Genetic Evaluation Of Production Traits For Dairy Cattle In Thailand, Jureeratn Sanpote, Sayan Buaban
A Genetic Evaluation Of Production Traits For Dairy Cattle In Thailand, Jureeratn Sanpote, Sayan Buaban
The Thai Journal of Veterinary Medicine
A study of genetic parameters, breeding values, genetic and phenotypic trends, 305-day milk, fat and protein yields was carried out using 6,357 pedigree and milk records of Holstein Friesian crossbreds, recorded between 1990-2002, in the Master bull project database, Artificial Insemination Division. First lactations, with a lactation length of more than 150 days, were adjusted to a 305-day yield and Restricted, Maximum Likelihood (REML), estimated, variance components. Genetic parameters and breeding values were estimated using the Best Linear Unbiased Prediction (BLUP). The results showed that the average 305-day milk, fat and protein yields were 3,651.87 ± 904.97, 138.32± 39.98 and …
The Effects Of Baker's Yeast (Saccharomyces Cerevisiae) In Dairy Cow Diets On Milk Yield, Some Rumen Fluid Parameters And Blood Metabolites Of Dairy Cow Diets, Hüseyi̇n Nursoy, Erol Baytok
The Effects Of Baker's Yeast (Saccharomyces Cerevisiae) In Dairy Cow Diets On Milk Yield, Some Rumen Fluid Parameters And Blood Metabolites Of Dairy Cow Diets, Hüseyi̇n Nursoy, Erol Baytok
Turkish Journal of Veterinary & Animal Sciences
The objective of this study was to investigate the effects of baker's yeast as a protein source instead of soybean meal in dairy cow diets. Four dairy cows were utilized in a 4 x 4 Latin Square experiment. Diets included 0.0% (Control Diet), 6.6% (Diet 1), 13.2% (Diet 2), and 19.8% (Diet 3) baker's yeast containing 3.56 x 10^8 CFU/g. Forty percent of the dry matter intake of dairy cows was supplied from concentrate, and forage was offered ad libitum. The dry matter intake, milk yield, and composition of milk were similar. While the rumen NH_3-N level was significantly low …
Estimation Of Breeding Values For Dairy Cattle Using Test-Day Milk Yields, İbrahi̇m Kaya, Yavuz Akbaş, Can Uzmay
Estimation Of Breeding Values For Dairy Cattle Using Test-Day Milk Yields, İbrahi̇m Kaya, Yavuz Akbaş, Can Uzmay
Turkish Journal of Veterinary & Animal Sciences
The objectives of this study were to estimate genetic parameters and breeding values for test-day (TD) and 305-day milk yields, and to compare the results from TD and 305-day analyses. The data comprised 10,822 TD records from 1103 first lactations of Holstein cows from state farms in the western part of Turkey. Additive genetic, residual and permanent environmental variances, heritabilities and breeding values for 305-day and TD milk yields were estimated by the REML method using animal models. The heritability estimate (0.11) of TD milk yields was lower than the corresponding estimate (0.25) for 305-day milk yields. The product-moment correlations …