Author: Arden Ray HardiePublisher:
ISBN:
Category :
Languages : en
Pages : 142
Book Description
Genetic and Phenotypic Relationships Among Yields of Milk and Its Components in Dairy Cattle
Author: Arden Ray HardieThe Genetics of Cattle, 2nd Edition
Author: Dorian GarrickPublisher: CABI
ISBN: 1780642210
Category : Science
Languages : en
Pages : 642
Book Description
Since the time of domestication more than 10,000 years ago, cattle have played an increasingly crucial role in the development of human civilizations. Progress has been quite remarkable since the turn of the century; the sequencing of the bovine genome in 2009 launched new avenues for furthering our understanding of theoretical and practical aspects of cattle genetics. Covering a vast array of questions, this book reviews major topics from molecular and developmental genetics, disease resistance and immunogenetics to genetic improvement of dairy and beef breeds, addressing all current problems in the field. This second edition includes a new team of authors and completely new chapters on the genetics of fat production, nutrition, feed intake and efficiency, growth and body composition. Fully updated throughout, it provides a valuable resource on cattle genetics for researchers, breeders, veterinarians and postgraduate students.
Dairy Chemistry and Biochemistry
Author: P. F. FoxPublisher: Springer
ISBN: 3319148923
Category : Technology & Engineering
Languages : en
Pages : 598
Book Description
This book is the most comprehensive introductory text on the chemistry and biochemistry of milk. It provides a comprehensive description of the principal constituents of milk (water, lipids, proteins, lactose, salts, vitamins, indigenous enzymes) and of the chemical aspects of cheese and fermented milks and of various dairy processing operations. It also covers heat-induced changes in milk, the use of exogenous enzymes in dairy processing, principal physical properties of milk, bioactive compounds in milk and comparison of milk of different species. This book is designed to meet the needs of senior students and dairy scientists in general.
A Study of the Genetic Relationships of Solids-not-fat Production in Bovine Milk
Author: Marvin Lyle NelsonEffect of Herd Environment on the Genetic and Phenotypic Relationship Among Milk Yield, Fertility, and Somatic Cell Score in Holstein Cattle
Author: Héctor Juárez CastilloPublisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
Genetic and Phenotypic Relationships Between Certain Body Measurements and Milk Production in Dairy Cattle
Author: John Clark WilkGenetic Relationships for Milk and Fat Yields Between Brazilian and United States Holstein Cattle Populations
Author: Claudio Napolis CostaPublisher:
ISBN:
Category :
Languages : en
Pages : 394
Book Description
Genetic relationships between Brazilian and U.S.A. Holstein cattle populations were studies using firstlactation 305-d ME milk and fat records of 29,413 daughters of 705 sires in Brazil and 726,932 daughters of 701 sires in the U.S.A. There were 358 sires with daughter records in both countries. Data sets consisted of all herds and low and high herds stratified by within-year standar deviation for milk (HYSD) computed within counthin country. Components of (co) variance, heritability, and genetic correlations for milk and fat yields were estimated using three data groupings: all, low and high HYDS data sets form within-country and between-country bivariete and multivariate analyses, simutaneous milk and fat yields in both countries. A sire model was solved with a restricted Maximum Likelihood (REML) derivative-free algorithm. Heritabilies for milk and fat yields using all the data were smaller in Brazil (.26 and .23) than in the in the U.S.A. (.33 and .36). Genetic correlations between milk and fat were .79 in Brazil and .62 in the U.S.A. Sire and residual variances for milk yield in Brazil were 59% and 81% (all herds), 51% and 58% (low HYSD herds), and 59% and 101% (high HYSD herds) as large as those obtained for all the U.S.A. data. corresponding percentage values for fat yield were 39% and 65%, and 48%, and 41 and 80%, respectively. Genetic correlations obtained from biavariate analyses between countries ranged from .79 to .87 for milk yield and were .89 or .90 for fat yield. Parameter estimates using all data for bibariate and multivariate analyses were essentially the same. Correlated response from sire selection using the U.S.A. information increased with average HYSD Brazil: daughter response was greatest (.77 kg/kg for milk yield and .63 kg/kg for fat yield) based on information from U.S.A. half-sisters in low HYSD herds. Unequal daughter responses from unequal genetic (co) variances under restrictive Brazilian conditions support the presence of an interaction between genetype and environment, which affects the yield expectation of daughters of U.S.A. sires performing in Brazilian herd enrironments.
Advances in Breeding of Dairy Cattle
Author: Julius Van der WerfPublisher:
ISBN: 9781786762986
Category : Cattle
Languages : en
Pages : 659
Book Description
Fertility in the High Producing Dairy Cow
Author: M. G. DiskinPublisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 296
Book Description
Effect of Environment on Nutrient Requirements of Domestic Animals
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309031818
Category : Science
Languages : en
Pages : 169
Book Description