Download or read book Heterozygosis in Evolution and in Plant Breeding Classic Reprint written by Edward Murray East and published by Forgotten Books. This book was released on 2017-10-27 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Heterozygosis in Evolution and in Plant Breeding written by Edward Murray East and published by . This book was released on 1912 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heterozygosis in Evolution and in Plant Breeding written by Edward Murray East and published by . This book was released on 1912 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HETEROZYGOSIS IN EVOLUTION I written by Edward M. (Edward Murray) 1879-19 East and published by . This book was released on 2016-08-26 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heterozygosis in Evolution and in Plant Breeding by E M East Assisted by H K Hayes written by Edward Murray EAST and published by . This book was released on 1912 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Genetics Classic Reprint written by John M. Coulte and published by Forgotten Books. This book was released on 2017-11-06 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Plant Genetics It should be realized that genetics is a natural out growth from the study of organic evolution. The con ception of evolution began as a speculation, but became scientific in connection with the work of lamarck and darwin. In such work the method used was that of Observation and inference. Facts were observed and an explanation was devised that would relate them. Resemblances and differences among species were noted, and it was inferred that these indicated degrees of relationship. It was assumed that closely related species must have had a comparatively recent common ancestry and that more distantly related species must have had a more remote common ancestry. Through comparisons of structure and of geographical distribution systems of phylogeny have been inferred, and an outline of the evolution of the plant and animal kingdoms has been the result. All of these conclusions are based upon comparison and inference. This method reached its extreme application in the work of darwin, whose observations included a range of forms and an extent of time unequaled by any pre ceding student oi evolution. It may be said that in darwin's work the method of comparison and infer ence reached the limit of its possibilities. The students of evolution were chiefly concerned With explaining the Changes that resulted in phylogeny. In other words. 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.
Download or read book The Relation of Certain Biological Principles to Plant Breeding Classic Reprint written by Edward M. East and published by Forgotten Books. This book was released on 2018-02-08 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Relation of Certain Biological Principles to Plant Breeding There will be given in the following pages a short outline of the current belief in the most important theories and principles of variation, evolution and heredity, with their practical applica tion to methods of breeding farm crops, which it is hoped will give the farmer an idea of the scope and present state of the problems. Should the reader be sufficiently interested to pursue the subject furthers, he should consult the annotated list of supplementary reading given at the end of this paper. 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.
Download or read book Cross Breeding and Hybridizing written by Liberty Hyde Bailey and published by Forgotten Books. This book was released on 2017-11-13 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Cross-Breeding and Hybridizing: The Philosophy of the Crossing of Plants, Considered With Reference to Their Improvement Under Cultivation; With a Brief Bibliography of the Subject Let me say, further, that crossing alone can accomplish comparatively little. The chief power in the evolution or progression of plants appears to be selec tion, or, as Darwin puts it, the law of preservation of favorable individual differences and variations, and the destruction of those which are injurious. Selection is the force which augments, develops and fixes types. Man must not only practice a judicious selection of parents from which the cross is to come, which is in reality but the exercise of a choice, but he must constantly select the best from among the crosses in order to maintain a high degree of usefulness and to make any advancement; and it sometimes happens that the selection is much more important to the cultivator than the crossing I do not wish to discourage the crossing of plants, but I do desire to dispell the charm which too often hangs about it. 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.
Download or read book Plant Cytogenetics Breeding and Evolution written by Bentlee Salinas and published by Scientific e-Resources. This book was released on 2018-12-21 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are about 300-315 thousand species of plants, of which the great majority, some 260-290 thousand, are seed plants. Green plants provide a substantial proportion of the world's molecular oxygen and are the basis of most of Earth's Ecologies, especially on land. Plants that produce grains, fruits and vegetables form humankind's basic foodstuffs, and have been domesticated for millennia. Plants play many roles in culture. They are used as ornaments and, until recently and in great variety, they have served as the source of most medicines and drugs. The scientific study of plants is known as botany, a branch of biology. Plant Cytogenetics, Breeding and Evolution Plant Cytogenetics comprises a topic of broad interest and increasing importance in plant science. In keeping with the exciting advances in plant genetics and genomics, we believe that a comprehensive and up-to-date reference on Plant Cytogenetics would be of great interest and value for researchers, instructors, and students with interests in genetics, plant biology, and plant genomics.
Download or read book Fundamentals of Plant Breeding 1914 written by John Merle Coulter and published by . This book was released on 2008-06-01 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work.
Download or read book PLANT BREEDING Classical to Modern written by P. M. Priyadarshan and published by Springer Nature. This book was released on 2019-11-09 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a detailed overview of both conventional and modern approaches to plant breeding. In 25 chapters, it explores various aspects of conventional and modern means of plant breeding, including: history, objective, activities, centres of origin, plant introduction, reproduction, incompatibility, sterility, biometrics, selection, hybridization, methods of breeding both self- and cross- pollinated crops, heterosis, synthetic varieties, induced mutations and polyploidy, distant hybridization, quality breeding, ideotype breeding, resistance breeding, breeding for stress resistance, G x E interactions, tissue culture, genetic engineering, molecular breeding, genomics, gene action and varietal release. The book’s content addresses the needs of students worldwide. Modern methods like molecular breeding and genomics are dealt with extensively so as to provide a firm foundation and equip readers to read further advanced books. Each chapter discusses the respective subject as comprehensively as possible, and includes a section on further reading at the end. Info-boxes highlight the latest advances, and care has been taken to include nearly all topics required under the curricula of MS programs. As such, the book provides a much-needed reference guide for MS students around the globe.
Download or read book Plant Breeding written by H.K. Jain and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Indian Society of Genetics and Plant Breeding was established in 1941 in recognition of the growing contribution of improved crop varieties to the country's agriculture. Scientific plant breeding had started inIndia soon after the rediscovery of Mendel's laws of heredity. The Indian Agricultural Research Institute set up in 1905 and a number of Agricultural Colleges in different parts of the country carried out some of the earliest work mostly inthe form of pure-line selections. In subsequent years, hybridization programmes in crops like wheat, rice, oilseeds, grain legumes, sugarcane and cotton yielded a large number of improved cultivars with significantly higher yields. A turning point came in the 1960s with the development of hybrids in several crops including inter-specific hybrids in cotton. And when new germplasm with dwarfing genes became available in wheat and rice from CIMMYT and IRRI, respectively,Indian plant breeders quickly incorporated these genes into the genetic background of the country's widely grown varieties with excellent grain quality and other desirable traits. This was to mark the beginning of modem agriculture in India as more and more varieties were developed, characterized by a high harvest index and response to modem farm inputs like the inorganic fertilizers . India's green revolution which has led to major surpluses offood grains and othercommodities like sugar and cotton has been made possible by the work of one of the largest groups of plant breeders working in a coordinated network.
Download or read book Plant Breeding in the Omics Era written by Rodomiro Ortiz Ríos and published by Springer. This book was released on 2015-09-16 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of plant breeding has grown rapidly in the last decade with breakthrough research in genetics and genomics, inbred development, population improvement, hybrids, clones, self-pollinated crops, polyploidy, transgenic breeding and more. This book discusses the latest developments in all these areas but explores the next generation of needs and discoveries including omics beyond genomics, cultivar seeds and intellectual and property rights. This book is a leading-edge publication of the latest results and forecasts important areas of future needs and applications.
Download or read book Plant Breeding written by Darbeshwar Roy and published by Alpha Science Int'l Ltd.. This book was released on 2000 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the experimental and analytical methodologies available for the genetical analysis of qualitative, quasi-quantitative and quantitative traits and its applications in practical plant breeding and evolution. Models for studying quantitative genetic variation following Birmingham and Edinburgh notations are described. The statistics used is simple and systematic so that the reader will have no difficulty in solving problems in plant genetics. It describes the genetic principles and provides breeding procedures underlying various breeding methods for manipulating qualitative, quasi-quantitative and quantitative traits. It takes into account the latest developments in breeding methodologies including dihaiploidy and apomixis, applications of tissue culture for plant breeding use, genetic engineering for production of transgenics and hybrids, and molecular marker technologies in the analysis of quantitative trait loci, marker assisted selection, evolution and conservation of genetic resources. This book will be useful for undergraduates, postgraduates, teachers and researchers working in the field of genetics and plant breeding.
Download or read book Genetics and Exploitation of Heterosis in Crops written by J. G. Coors and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the momentous contributions of hybrid crop varieties with worldwide experts. Topics include an overview, quantitative genetics, genetic diversity, biochemistry and molecular biology, methodologies, commercial strategies, and examples from numerous crops.
Download or read book Polyploid Population Genetics and Evolution From Theory to Practice written by Hans D. Daetwyler and published by Frontiers Media SA. This book was released on 2020-01-28 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety of Genetically Engineered Foods written by National Research Council and published by National Academies Press. This book was released on 2004-07-08 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assists policymakers in evaluating the appropriate scientific methods for detecting unintended changes in food and assessing the potential for adverse health effects from genetically modified products. In this book, the committee recommended that greater scrutiny should be given to foods containing new compounds or unusual amounts of naturally occurring substances, regardless of the method used to create them. The book offers a framework to guide federal agencies in selecting the route of safety assessment. It identifies and recommends several pre- and post-market approaches to guide the assessment of unintended compositional changes that could result from genetically modified foods and research avenues to fill the knowledge gaps.
