Heterozygosis in Evolution and in Plant Breeding PDF Download
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Author: Edward Murray East
Publisher:
ISBN:
Category : Heterozygosis
Languages : en
Pages : 82
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Book Description
Author: Edward Murray East
Publisher:
ISBN:
Category : Heterozygosis
Languages : en
Pages : 82
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Book Description
Author: Edward Murray East
Publisher: Forgotten Books
ISBN: 9780265824818
Category : Science
Languages : en
Pages : 70
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Book Description
Excerpt from Heterozygosis in Evolution and in Plant Breeding When a biologist begins any line of genetic work with either plants or animals he generally has occasion to differentiate his stock into. More or less pure types by in-and-in breeding. Frequently In the case of animals, and nearly always ln the case of plants that are naturally cross-fertilized, he finds there is a loss of vigor, usually unaccompanied by pathological symptoms. This loss of vigor is generally expressed by a decrease In the size of the individual, but it may be shown by a slight decrease in fertility. The phenomenon, although it probably occurs in all great groups reproducing sexually, is not general, however, for in many animals and in plants that are normally self-fertilized it is unnoticeable. If after obtaining his pure stocks the experimenter has occasion to cross strains that differ in character, he Often finds that the reverse phenomenon occurs. The vigor of the hybrid is greater than that of either parent. These manifestations have been noticed for over a century by plant breeders and for probably two thousand years or more by animal hybridizers. Until the end of the nineteenth century\ the interpretation of the phenomena, if, indeed, that which is Only a paraphrased statement of the facts can be called an interpreta tion, was that deterioration both morphological and physiological is the direct result Of inbreeding, and therefore occasional crossing of genetically distinct blood lines is a necessary requisite to vigor in every sexually propagated species. Seven years ago an extended series Of investigations was started at the Connecticut Agricultural Experiment Station having as their primary object an interpretation of these facts in keeping with the more extended knowledge comprised in modern biology. This paper presents a full account Of the views that the writers have come to hold through the data gathered in these experiments, although it has not been thought necessary or advisable to confuse the arguments by overloading it with all of the data in their posses. 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.
Author: I. Michael Lerner
Publisher: Forgotten Books
ISBN: 9781391652634
Category : Science
Languages : en
Pages : 152
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Book Description
Excerpt from Genetic Homeostasis Other types Of evidence, which contribute to the problem but which will be considered here in less detail include. 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.
Author: Sewall Wright
Publisher: University of Chicago Press
ISBN: 9780226910512
Category : Science
Languages : en
Pages : 636
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Book Description
Vol. 3.
Author: United States. Bureau of Plant Industry
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 596
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Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 598
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Book Description
Author: Edward Murray East
Publisher:
ISBN:
Category : Horticulture
Languages : en
Pages : 902
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Book Description
Author: Geoffrey S. Ginsburg
Publisher: Academic Press
ISBN: 0123822270
Category : Science
Languages : en
Pages : 1343
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Book Description
Genomic and Personalized Medicine, Second Edition - winner of a 2013 Highly Commended BMA Medical Book Award for Medicine - is a major discussion of the structure, history, and applications of the field, as it emerges from the campus and lab into clinical action. As with the first edition, leading experts review the development of the new science, the current opportunities for genome-based analysis in healthcare, and the potential of genomic medicine in future healthcare. The inclusion of the latest information on diagnostic testing, population screening, disease susceptability, and pharmacogenomics makes this work an ideal companion for the many stakeholders of genomic and personalized medicine. With advancing knowledge of the genome across and outside protein-coding regions of DNA, new comprehension of genomic variation and frequencies across populations, the elucidation of advanced strategic approaches to genomic study, and above all in the elaboration of next-generation sequencing, genomic medicine has begun to achieve the much-vaunted transformative health outcomes of the Human Genome Project, almost a decade after its official completion in April 2003. Highly Commended 2013 BMA Medical Book Award for Medicine More than 100 chapters, from leading researchers, review the many impacts of genomic discoveries in clinical action, including 63 chapters new to this edition Discusses state-of-the-art genome technologies, including population screening, novel diagnostics, and gene-based therapeutics Wide and inclusive discussion encompasses the formidable ethical, legal, regulatory and social challenges related to the evolving practice of genomic medicine Clearly and beautifully illustrated with 280 color figures, and many thousands of references for further reading and deeper analysis
Author: U.S. Bureau of plant industry
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 84
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Book Description
Author: George Christopher Williams
Publisher: Princeton University Press
ISBN: 0691185506
Category : Science
Languages : en
Pages : 335
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Book Description
Biological evolution is a fact—but the many conflicting theories of evolution remain controversial even today. When Adaptation and Natural Selection was first published in 1966, it struck a powerful blow against those who argued for the concept of group selection—the idea that evolution acts to select entire species rather than individuals. Williams’s famous work in favor of simple Darwinism over group selection has become a classic of science literature, valued for its thorough and convincing argument and its relevance to many fields outside of biology. Now with a new foreword by Richard Dawkins, Adaptation and Natural Selection is an essential text for understanding the nature of scientific debate.
