Download or read book Genetic Evaluation of Crossbred Dairy Cattle for Milk Production Feed Efficiency and Reproduction written by Frantz Supreme and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genomic and Genetic Evaluation of Feed Efficiency and Stillbirth in Dairy Cattle written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feed efficiency is an economically important trait in the dairy cattle industry, and feed costs accounts for more than 50% of total production costs. Prediction of genetic breeding value has been a focus of animal breeding since the beginning of the 20th century. Because of ongoing genetic selection for productivity and improvement in herd management, the efficiency of converting feed to milk in U.S. dairy cattle has doubled over the past 60 years due to dilution of maintenance. It is widely recognized that additional selection based on biological differences between individuals in feed efficiency is highly desirable. The emergence of high dimensional genomic data offers opportunities for selection and evaluation of feed efficiency directly through whole genome-enabled prediction. This thesis centers on genetic evaluation and prediction of traits related to feed efficiency in dairy cattle using whole genome molecular markers. We investigated various whole genome prediction approaches tailored to capturing total genetic variation, with the goal of enhancing predictive performance for feed efficiency and related traits. In particular, this thesis includes three studies. In the first study, a semi-supervised learning approach was introduced, and its prediction accuracy was assessed using residual feed intake (RFI) data. The second study compared an interaction model with within- and across-environment components using data from multiple environments to estimate genomic variances and assess the accuracy of genomic predictions for RFI and its component traits. The third study involved genetic evaluation of direct and maternal stillbirth rate, a trait that contributes to whole farm production efficiency, using data of Brown Swiss, Jersey, and Holstein bulls. Our results indicate that, while selection on feed efficiency in dairy cattle using whole genome molecular markers is promising, low accuracy of prediction remains an ongoing challenge due to the limited size of the reference population. Pooling data across countries or production systems is an option for increasing size of the reference population, but genotype by environment interactions and population stratification must be addressed. Ongoing collection of individual feed intake records is necessary to improve prediction accuracy, in terms of increasing the size of the reference population and ensuring that reference animals are closely related to the current selection candidates.

Download or read book Breeding for robustness in cattle written by Marija Klopcic and published by BRILL. This book was released on 2023-09-04 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has revealed unfavourable trends in e.g. fertility, udder health and locomotion in some major dairy cattle breeds due to a large increase in production and insufficient consideration of functional traits in the breeding goals. Such unfavourable trends in some functional traits increase costs. Additionally, the enlargement of herds leads to less available labour time per individual cow. This asks for cows that are easy to handle. At the same time, society is demanding a higher welfare standard of animals. These contradicting developments have increased the desire for so called more robust animals. Robustness can be defined as 'the ability to maintain homeostasis in commonly accepted and sustainable herds of the near future'; or 'the ability of the cow to function well in the environment she lives in as well as in a wide range of climates and production systems'. This book contains a series of articles (26) dealing with the concept of robustness, including aspects like evolution, genetics, environment, animal health and welfare, and integrity. Besides the major functional traits also the links to energy balance, hot climatic conditions, and the attitude and input of stakeholders towards robustness as part of the breeding program are discussed. This book is the first attempt to summarise the available knowledge concerning this topic in cattle, making this book unique. The contributions are from authors of 16 countries from all over the world. However, the focus is presently on farm animal level, while in future robustness of the whole production system may also require additional attention.

Download or read book Genetic Improvement of Dairy Cattle written by United States. Agricultural Research Service. Animal Husbandry Research Division and published by . This book was released on 1958 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breeding for Robustness in Cattle written by Marija Klopčič and published by Brill Wageningen Academic. This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has revealed unfavourable trends in e.g. fertility, udder health and locomotion in some major dairy cattle breeds due to a large increase in production and insufficient consideration of functional traits in the breeding goals. Such unfavourable trends in some functional traits increase costs. Additionally, the enlargement of herds leads to less available labour time per individual cow. This asks for cows that are easy to handle. At the same time, society is demanding a higher welfare standard of animals. These contradicting developments have increased the desire for so called more robust animals. Robustness can be defined as 'the ability to maintain homeostasis in commonly accepted and sustainable herds of the near future'; or 'the ability of the cow to function well in the environment she lives in as well as in a wide range of climates and production systems'. This book contains a series of articles (26) dealing with the concept of robustness, including aspects like evolution, genetics, environment, animal health and welfare, and integrity. Besides the major functional traits also the links to energy balance, hot climatic conditions, and the attitude and input of stakeholders towards robustness as part of the breeding program are discussed. This book is the first attempt to summarise the available knowledge concerning this topic in cattle, making this book unique. The contributions are from authors of 16 countries from all over the world. However, the focus is presently on farm animal level, while in future robustness of the whole production system may also require additional attention.

Download or read book Advances in Breeding of Dairy Cattle written by Julius Van der Werf and published by . This book was released on 2019 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluating Crossbred Dairy Cattle for Reproduction and Production Traits and Their Genetic Potential in Thailand written by Sompop Kassumma and published by . This book was released on 1985 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Aspects of Dairy Cattle Breeding written by Ivar Johansson and published by . This book was released on 1961 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the present time there is a call for information on breeding procedures which cannot always be supplied because decisive experiments are lacking. The purpose of this little volume is to give a survey of the present knowledge in regard to the genetic of economically important characters of dairy cattle and the methods for their improvement.

Download or read book Proceedings of the 6th World Congress on Genetics Applied to Livestock Production January 11 16 1998 written by and published by . This book was released on 1998 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 3rd World Congress on Genetics Applied to Livestock Production Introduction breeding programs for dairy and beef cattle sheep and goats water buffalo written by and published by . This book was released on 1986 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Evaluation of Crossbred Dairy Cattle Population in Tropical Condition written by Nadum Jalal Ismaiel and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Genetics of Cattle 2nd Edition written by Dorian Garrick and published by CABI. This book was released on 2014-11-28 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Sustainable Food Production written by Paul Christou and published by Springer. This book was released on 2012-12-05 with total page 1869 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gathering some 90 entries from the Encyclopedia of Sustainability Science and Technology, this book covers animal breeding and genetics for food, crop science and technology, ocean farming and sustainable aquaculture, transgenic livestock for food and more.

Download or read book Genetic Evaluation of Crossbred Dairy Cattle for Economic Traits written by Vijayakumar B. Shettar and published by . This book was released on 1991 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Evaluation of Crossbred Dairy Cattle for Economic Traits written by VASI REDDY TARA and published by . This book was released on 1991 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breeding and Improvement of Farm Animals written by Everett James Warwick and published by McGraw-Hill Science, Engineering & Mathematics. This book was released on 1979 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Location: Aggie West Library!

Download or read book Crossbreeding Bos Indicus and Bos Taurus for Milk Production in the Tropics written by E. P. Cunningham and published by Bernan Press(PA). This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: