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Author: James E. Russell Publisher: ISBN: Category : Cattle Languages : en Pages : 178
Book Description
Theory of genetics; Contribution of science to cattle breeding; Life, a driving compelling force; Cells form living things; The process of sexual reproduction; Types of heredity; Mendelian theories; Summary of genetic principles; The art of breeding dairy cattle; The acquisition of skills; Arts are skills; Breeders who have succeeded; The farm, herd, orchard, and home of vernon; The overbrook dairy and breeding establishment; Development of the golden family; Development of a pure-bred strain through mixter faithful; Personal experiences and suggestions.
Author: James E. Russell Publisher: ISBN: Category : Cattle Languages : en Pages : 178
Book Description
Theory of genetics; Contribution of science to cattle breeding; Life, a driving compelling force; Cells form living things; The process of sexual reproduction; Types of heredity; Mendelian theories; Summary of genetic principles; The art of breeding dairy cattle; The acquisition of skills; Arts are skills; Breeders who have succeeded; The farm, herd, orchard, and home of vernon; The overbrook dairy and breeding establishment; Development of the golden family; Development of a pure-bred strain through mixter faithful; Personal experiences and suggestions.
Author: Ivar Johansson Publisher: ISBN: Category : Nature Languages : en Pages : 280
Book Description
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.
Author: Various Publisher: Johnston Press ISBN: 1446536025 Category : Technology & Engineering Languages : en Pages : 74
Book Description
This book contains classic material dating back to the 1900s and before. The content has been carefully selected for its interest and relevance to a modern audience.
Author: John Hinks Publisher: Farming Press Limited ISBN: Category : Technology & Engineering Languages : en Pages : 120
Book Description
The historical background. Specification of objectives. Factors determining genetic responses to selective breeding. Herd foundation. Female selection. Male selection. Implementation of breeding programmes.
Author: Marija Klopcic Publisher: BRILL ISBN: 9086866573 Category : Technology & Engineering Languages : en Pages : 281
Book Description
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.
Author: James E. Russell
Author: James E. Russell
Author: Ivar Johansson
Author: Various
Author: Thomas P. Fairchild
Author: John Whittemore Gowen
Author: Julius Van der Werf
Author: James E. Russell
Author: John Hinks
Author: Marija Klopcic
Author: Julius Van der Werf