Geoff Simm. This clearly written book outlines the principles and practice behind the recent advances in livestock improvement. The dramatic improvement in dairy cattle, beef cattle and sheep has been made possible through the use of performance recording and selection, especially when this employs techniques such as artificial insemination and BLUP (Best Linear Unbiased Prediction). Geoff Simm describes the origin of today's livestock breeds and the scientific principles of livestock improvement, the basic principles of genetics and the applications of these principles of genetics and the applications of these principles to practical livestock farming. The book ends with a discussion of the role of the new reproductive technologies and molecular genetics, and explores the ethical implications involved. There is a glossary of technical terms. Dr. Geoff Simm leads the Breeding Section in the Scottish Agricultural College's Genetics and Behavioral Sciences Dept. 24 color photos, 50 line drawings, approx. 300 pgs, Hardcover