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With the advent of genetic engineering, "designer" crops might interbreed with natural populations. Could such romances lead to the evolution of "superweeds", as some have suggested? But haven't crops had sex with wild plants in the past? Has such gene swapping occurred without consequences? And if consequences have indeed occurred, what lessons can be gleaned for engineered crops?In Dangerous Liaisons? Norman Ellstrand examines these and other questions. He begins with basic information about the natural hybridization process. He then describes what we now know about hybridization between the world's most important crops-such as wheat, rice, maize, and soybeans-and their wild relatives. Such hybridization, Ellstrand explains, is not rare, and has occasionally had a substantial impact. In some cases, the result was problematic weeds. In others, crop genes have diluted natural diversity to the point that wild populations of certain rare species were absorbed into the gene pool of the more common crop, essentially bringing the wild species to the brink of extinction.Ellstrand concludes with a look to the future. Will engineered crops pose a greater threat than traditional crops? If so, can gene flow and hybridization be managed to control the escape of engineered genes? This book will appeal to academics, policy makers, students, and all with an interest in environmental issues.

The Colour Book and its interactive learning CD-ROM is the first ever learner-focused resource for hair colour. This long-awaited guide offers comprehensive coverage of all Level 2 and 3 colour theory, techniques and applications as well as key health and safety and consultation information. Packed full of examples and full-colour illustrations, The Colour Book is not only a fascinating read but takes the fear out of hair colouring to equip students and aspiring colourists with the confidence and know-how to achieve Women Healing from Abuse : Meditations for Finding Peace ebook pdf great looking colour results. Readers will enjoy Tracey Lloyd's friendly writing style and find The Colour Book an easy-to-follow and indispensable practical handbook. CD-ROM Thomson Learning has teamed up with L'Oreal Professionnel, the world's number one in hair colour, to produce the first ever interactive learning hairdressing CD-ROM and textbook package.

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Author: Norman C. Ellstrand
Number of Pages: 264 pages
Published Date: 09 Mar 2005
Publisher: JOHNS HOPKINS UNIVERSITY PRESS
Publication Country: Baltimore, MD, United States
Language: English
ISBN: 9780801881909
Download Link: Click Here
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