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Book Synopsis Heterozygosis in Evolution and in Plant Breeding by : Edward Murray East
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:
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.
Book Synopsis Heterozygosis in Evolution and in Plant Breeding (Classic Reprint) by : Edward Murray East
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.
Book Synopsis Heterozygosis in Evolution and in Plant Breeding by : Edward Murray East
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:
Book Synopsis Heterozygosis in Evolution and in Plant Breeding, by E. M. East,... Assisted by H. K. Hayes,... by : Edward Murray EAST
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:
Book Synopsis HETEROZYGOSIS IN EVOLUTION & I by : Edward M. (Edward Murray) 1879-19 East
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:
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.
Book Synopsis Plant Breeding by : Darbeshwar Roy
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.
The application of new molecular technology has greatly increased our understanding of the role of chromosomal change in plant evolution. There is now a broad database on genome size variation within and among species and a wide array of nuclear and cytoplasmic genetic markers. There is a variety of literatures addressing this subject but much of it is scattered. This book created a contemporary synthesis or work in this area and addresses issues such as herogeneity, polyploidy, chromosomal rearrangements within species and phenotypic consequences of chromosome doubling.
Book Synopsis The Role of Chromosomal Change in Plant Evolution by : Donald A. Levin
Download or read book The Role of Chromosomal Change in Plant Evolution written by Donald A. Levin and published by Oxford University Press. This book was released on 2002-11-28 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of new molecular technology has greatly increased our understanding of the role of chromosomal change in plant evolution. There is now a broad database on genome size variation within and among species and a wide array of nuclear and cytoplasmic genetic markers. There is a variety of literatures addressing this subject but much of it is scattered. This book created a contemporary synthesis or work in this area and addresses issues such as herogeneity, polyploidy, chromosomal rearrangements within species and phenotypic consequences of chromosome doubling.
Perspectives in plant breeding. The evolution of cultivated plants. Plant introductions. Mode of reproduction in relation to plant-breeding methods. Variability in plants. Genes and qualitative characters. Genes and qualitative characters. Quantitative inheritance. Role of the environment in plant breeding. Selection in self-pollinated crops. Hybridization and gene combinations. Breeding self-pollinated crops by hybridization and pedigree selection. Bulk population method of breeding self-pollinated plants. The backcross method of breeding. Cross-pollinated crops. Control of cross-pollination. Selection in cross-pollinated crops. Inbreeding and heterosis. Hybrid varieties. Recurrent selection. Synthetic varieties. Autoploidy in plant breeding. Alloploidy.Aneuploids. Mutagens and crop improvement. Interspecific hybridization. Interspecific transfer of characters. Genetics of resistance to diseases and insects. Breeding for resistance to diseases and insects. Maintenance and distribution of varieties. Field-plot technique and experimental design.
Book Synopsis Introduction to Plant Breeding by : Fred N. Briggs
Download or read book Introduction to Plant Breeding written by Fred N. Briggs and published by . This book was released on 1967 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perspectives in plant breeding. The evolution of cultivated plants. Plant introductions. Mode of reproduction in relation to plant-breeding methods. Variability in plants. Genes and qualitative characters. Genes and qualitative characters. Quantitative inheritance. Role of the environment in plant breeding. Selection in self-pollinated crops. Hybridization and gene combinations. Breeding self-pollinated crops by hybridization and pedigree selection. Bulk population method of breeding self-pollinated plants. The backcross method of breeding. Cross-pollinated crops. Control of cross-pollination. Selection in cross-pollinated crops. Inbreeding and heterosis. Hybrid varieties. Recurrent selection. Synthetic varieties. Autoploidy in plant breeding. Alloploidy.Aneuploids. Mutagens and crop improvement. Interspecific hybridization. Interspecific transfer of characters. Genetics of resistance to diseases and insects. Breeding for resistance to diseases and insects. Maintenance and distribution of varieties. Field-plot technique and experimental design.
Book Synopsis Plant Evolution and the Origin of Crop Species by : James F. Hancock
Download or read book Plant Evolution and the Origin of Crop Species written by James F. Hancock and published by . This book was released on 1992 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
This book examines the causes of genetic diversity within and between populations, species formation and multiplication and the association of species in communities. It also discusses reproductive patterns in relation to the integrated control of breeding systems and chromosomes behaviour. The ideas presented link fields of biology usually treated separately, which are relevant to population genetic, cytogenetic , ecological and evolutionary studies.This revised edition includes significant advances in the fields of plant genetics and cytogenetics and a greater emphasis on long term evolutionary processes.
Book Synopsis Genetic and Evolutionary Diversity by : Dr Robert Callow
Download or read book Genetic and Evolutionary Diversity written by Dr Robert Callow and published by Taylor & Francis. This book was released on 2023-05-31 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the causes of genetic diversity within and between populations, species formation and multiplication and the association of species in communities. It also discusses reproductive patterns in relation to the integrated control of breeding systems and chromosomes behaviour. The ideas presented link fields of biology usually treated separately, which are relevant to population genetic, cytogenetic , ecological and evolutionary studies.This revised edition includes significant advances in the fields of plant genetics and cytogenetics and a greater emphasis on long term evolutionary processes.