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 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 58 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 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 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 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.
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.
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:
Download or read book Plant Population Genetics Breeding and Genetic Resources written by A. H. D. Brown and published by Sinauer Associates, Incorporated. This book was released on 1990 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the International Symposium on Population Genetics and Germplasm Resources in Crop Improvement, held August 1988 at U. Cal., Davis. Twenty-one contributions are grouped into three broad sections which consider the kinds and amounts of genetic diversity found in plant species at the protein and DNA levels; the structure of genetic variation and the evolutionary processes that shape genetic diversity; and applications in forestry, crop improvement, and the conservation and use of crop genetic resources. Cloth edition (unseen), $60. Annotation copyrighted by Book News, Inc., Portland, OR
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.
Download or read book Dictionary of Plant Genetics and Molecular Biology written by Gurbachan Miglani and published by Routledge. This book was released on 2017-11-22 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Dictionary of Plant Genetics and Molecular Biology, more than 3,500 technical terms from the fields of plant genetics and molecular biology are defined for students, teachers, and researchers in universities, institutes, and agricultural research stations. An excellent educational tool that will save you time and effort, this dictionary brings together into a single source the meaning and origin of terms from the fields of classical genetics, molecular genetics, mutagenesis, population genetics, statistics, plant biotechnology, evolutionary genetics, plant breeding, and plant biotechnology.Finding and understanding the precise meaning of many terms in genetics is crucial to understanding the foundation of the subject matter. For reasons of space, the glossaries provided at the end of most textbooks are highly inadequate. There is, then, dire need for a dictionary of terms in a single volume. You?ll appreciate the helpful approaches and features of Dictionary of Plant Genetics and Molecular Biology, including: no terms that are of limited use, very general, or self-explanatory cross references for effective access to the materials and economy of space alternate names of terms, denoted with “Also referred to as . . .” or “Also known as . . .” multiple definitions for terms defined by different authors or for terms with different meanings in different contexts authors who coined, described, or contributed toward further understanding of a term are listed and respective publications are included in the BibliographyAt last, there is compiled in a single volume the technical terms you need to know in order to understand plant genetics and molecular biology. As your knowledge grows, you?ll uncover even more terms that you need to understand. You?ll find yourself turning to this handy guide time and time again for help on all levels.
Download or read book Outbreeding Mechanisms in Flowering Plants written by Carolyn Leach and published by . This book was released on 2005 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles and Methods of Plant Breeding written by A. Fasoulas and published by . This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetical and evolutionary principles: Genes and gene action; Codominance; Semidominance; Positive dominance; Negative dominance; Coepistasis; Semiepistasis; Positive epistasis; Negative epistasis; Evolution of gene action; Genetic basis of vigor and degeneration; The genetic structure of cultivars; Evolution by natural selection vs. evolution under domestication; Combining ability and heritability; Principles of evaluation and selection: The masking effects of heteroallelism; The masking effects of density and competition; The masking effects of soil heterogeneity and soil fertility; The contiguous control method; The moving average method; The grid method; The honeycomb method; The method of correlated traits; The masking effects of genotype environment interaction; The honeycomb field designs: Nonreplicated honeycomb designs; Replicated honeycomb designs; Layout and statistical analysis of the honeycomb field trials; Breeding methods for cultivar engineering: Genetic basis of progress through selection; Choice of parents; Selection schemes; Mass honey comb selection; Pedigree honeycomb selection; The mechanization of selection for yield; Concluding remarks.
Download or read book Plant Breeding written by William John Cooper Lawrence and published by Hodder Education. This book was released on 1968 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions from the Laboratory of Plant Genetics written by Bussey Institution and published by . This book was released on 1913 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
