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Excerpt from Proceedings of the 36th Southern Pasture and Forage Crop Improvement Conference: May 1-3, 1979, Beltsville, Maryland Since 1974, a powerful new technique for microbial genetic engineering, in vitro recombinant dna formation, has permitted the development of a new type of mutant strain. These recombinant dna strains must be regarded as mutants of the original parent, since their overall genetic composition is still more than 99% that of their progenitor. They differ from the earlier man - made mutants, however, in that the last to of the gene structure may contain additional types of genes, including some that might never be introduced by natural gene transfer processes. As a result, they may (1) exhibit metabolic capabilities that are qualitatively different from those of the unmutated parent; (2) offer qualitatively new types of human benefits, such as the production of eukaryotic gene products by prokaryotic microbial fermentations or development of more efficient and effective insect biolog ical control agents to protect the world's food crops in lieu of a number of non-selective and dangerous chemical insecticides. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.