Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download The Effect Of Polyploidy And Apomixis On The Evolution Of Species In Crepis full books in PDF, epub, and Kindle. Read online The Effect Of Polyploidy And Apomixis On The Evolution Of Species In Crepis ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : George Ledyard Stebbins
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (816 download)
Download or read book The Effect of Polyploidy and Apomixis on the Evolution Os Species in Crepis written by George Ledyard Stebbins and published by . This book was released on 1939 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George Ledyard Stebbins
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book The Effect of Polyploidy and Apomixis on the Evolution of Species in Crepis written by George Ledyard Stebbins and published by . This book was released on 1939 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Walter H. Lewis
Publisher : Springer Science & Business Media
ISBN 13 : 1461330696
Total Pages : 576 pages
Book Rating : 4.4/5 (613 download)
Download or read book Polyploidy written by Walter H. Lewis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyploidy as a dramatic mutational event in the process of evolution has wide implications in nature and for the generation of new and improved crops. The three day Conference on POLYPLOIDY: BIOLOGICAL RELEVANCE focused on three aspects of this natural phenomenon: the first emphasized the characteristics of polyploidy, the second described the occurrence of polyploidy among plants and animals, and the third considered past and future areas of both fundamental and pragmatic research that involve polyploidy. New information relative to origin, cytogenetics, ecology, physiology, biochemistry, and populational studies stress the need to reexamine current views on the origins of polyploidy and its significance among both plants and animals. There are major differences in the occurrence of polyploidy between. plant groups and it is proving a much more common event among bisexual vertebrates than heretofore considered possible. Crop development and improvement must utilize approaches based fundamentally on more natural systems; in fact future research should focus more on polyploidy as a natural phenomenon that needs study at all levels of endeavor from field-oriented populational aspects to sophisticated molecular analyses and genome manipulations. This volume provides a summary of current knowledge of polyploidy pertinent to botanists, zoologists, and agriculturists who are interested in the evolution o~natural systems and who are concerned with the contribution that crop improvement can make to human well-being. Walter H. Lewis St. Louis, Missouri October, 1979 v ACKNOWLEDGMENTS The Host Committee thanks all speakers and moderators for their generous contribution to the Conference and to this volume.
Author : Ernest Brown Babcock
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.3/5 (243 download)
Download or read book The Genus Crepis: The taxonomy, phylogeny, distribution, and evolution of Crepis written by Ernest Brown Babcock and published by . This book was released on 1947 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William F. Grant
Publisher : Elsevier
ISBN 13 : 1483273709
Total Pages : 691 pages
Book Rating : 4.4/5 (832 download)
Download or read book Plant Biosystematics written by William F. Grant and published by Elsevier. This book was released on 2013-09-25 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant Biosystematics is a compendium of papers from a symposium titled "Plant Biosystematics: Forty Years Later" held in Montreal in July 1983. This collection reviews the current field of biosystematics, particularly the evolution of natural biota, and how plant biosystematics can contribute to the welfare of humans. One paper reviews biosystematics, compares new approaches, and discusses the latest trend in comparative, molecular evolution of genes. One author discusses the cytology and biosystematics concerning the discontinuities and genetic independence occurring in the evolutionary process. Another author discusses chromosome pairing in species and hybrids that includes models of chromosome pairing in diploids. The text also describes chromosome banding and biosystematics, as well as the problems of chromosome banding that should be addressed to in future research. With estimates of the number of species being threatened with extinction numbering around 20,000 one paper address the issue of conservation and biosystematics. The author suggests that more biological information should be published to avoid duplication of effort, and possibly drive scientists to have their views more widely felt. Agriculturists, botanists, conservationists, environmentalists, and researchers in the field of botany, conservation, and plant genealogy will find this book valuable.
Author : Amots Dafni
Publisher : Springer Science & Business Media
ISBN 13 : 3709163064
Total Pages : 339 pages
Book Rating : 4.7/5 (91 download)
Download or read book Pollen and Pollination written by Amots Dafni and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pollen studies make important contributions nature, into three main themes: pollen struc to our knowledge in many interdisciplinary ture and constituents, pollen evolutionary arenas. Pollen identification is widely used in ecology and the pollen-pollinator interface. reconstruction of, e.g., vegetation, the climate Several papers overlap somewhat or are of the past, and plant biodiversity. Studies perhaps even somewhat contradictory and concerning pollen structure, size and form are reflect the author's own ideas and experience. key issues in basic sciences, as, e.g., plant Some could be understood more deeply by taxonomy and evolution, but are also of consulting other closely related articles. The importance in applied fields as, e.g., plant reader is strongly referred to the respective breeding. In pollination studies pollen is literature list of each article. generally used specifically to identify food ofanther ripening and pollen The last steps development (Pacini) and the mature pollen sources of visitors and to reconstruct their foraging routes. Fewer have been devoted to wall structure (Hesse) are key factors to pollen collection mechanisms and to the struc understand pollen dispersal mechanisms in ture and content of pollen in relation to its biotic pollination (Stroo) as well as abiotic pollination (Ackerman). Pollen size, shape, function.
Author : Tamara N. Naumova
Publisher : CRC Press
ISBN 13 : 1351086650
Total Pages : 275 pages
Book Rating : 4.3/5 (51 download)
Download or read book Apomixis in Angiosperms written by Tamara N. Naumova and published by CRC Press. This book was released on 2018-01-10 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Apomixis in Angiosperms: Nucellar and Integumentary Embryony is based on original cytoembryological data and critically reviewed literature on more than 250 species from 57 families of angiosperms. The book covers the complete process of nucellar and integumentary embryo formation and viable seed development within species, families, and among angiosperms in general. Many species (some of which are economically important) characterized by adventive embryony are listed. The book also provides an original simple classification of apomixis and offers a new approach to differentiating embryological structures in cases of apomixis and amphimixis. Apomixis in Angiosperms: Nucellar and Integumentary Embryony will be a useful reference for embryologists, botanists, cytologists, geneticists, and plant breeders. It will also benefit any researcher interested in studying somatic embryo formation in tissue culture.
Author :
Publisher :
ISBN 13 :
Total Pages : 740 pages
Book Rating : 4.3/5 (91 download)
Download or read book Agricultural Library Notes written by and published by . This book was released on 1940 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Work Projects Administration
Publisher :
ISBN 13 :
Total Pages : 792 pages
Book Rating : 4.:/5 (31 download)
Download or read book Index of Research Projects ... written by United States. Work Projects Administration and published by . This book was released on 1938 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ernest Brown Babcock
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (89 download)
Download or read book The Genus Crepis written by Ernest Brown Babcock and published by . This book was released on 1947 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lenn Jerling
Publisher : Routledge
ISBN 13 : 1351466305
Total Pages : 324 pages
Book Rating : 4.3/5 (514 download)
Download or read book Apomixis in Plants written by Lenn Jerling and published by Routledge. This book was released on 2017-11-22 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Apomixis in Plants presents a comprehensive review of different aspects of asexual seed formation in plants. This is important in plant research since apomixis could greatly facilitate breeding in important crops. It is also interesting theoretically because it carries problems related to genetic variation and evolution to its extreme. The book features a broad selection of topics, including a historical review of ideas and landmarks in the field; comparisons with other types of asexual reproduction in higher plants and with related phenomena in animals and related plants; a presentation of cytology and embryology of apomicts and the diversified terminology in the field; views on the genetic background of apomixis and environmental effects on its expression; and the interrelation between apomixis and other traits. Additional topics covered include classical and modern theories of sexual versus asexual reproduction; geographical and taxonomical trends in apomicts; ecological implications of apomixis, and a review of future possibilities for using apomixis in plant breeding. Apomixis in Plants is an important reference volume for researchers and students in all areas of botany, ecology, and plant breeding.
Author : Arnold Arboretum
Publisher :
ISBN 13 :
Total Pages : 528 pages
Book Rating : 4.3/5 (91 download)
Download or read book Journal of the Arnold Arboretum written by Arnold Arboretum and published by . This book was released on 1973 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes annual "Bibliography of the published writings of the staff and students..."
Author : Geoffrey Peter Chapman
Publisher : Cambridge University Press
ISBN 13 : 9780521380607
Total Pages : 318 pages
Book Rating : 4.3/5 (86 download)
Download or read book Reproductive Versatility in the Grasses written by Geoffrey Peter Chapman and published by Cambridge University Press. This book was released on 1990-11-30 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1990 text brings together a detailed review by acknowledged authorities of grass reproductive biology. Essential to contemporary awareness of grasses is an understanding of their role in sustaining ecologically fragile environments, and the relative importance of annual and perennial reproduction is examined here.
Author :
Publisher :
ISBN 13 :
Total Pages : 992 pages
Book Rating : 4.:/5 (318 download)
Download or read book The Journal of South African Botany written by and published by . This book was released on 1961 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pamela Soltis
Publisher : Springer Science & Business Media
ISBN 13 : 3642314414
Total Pages : 416 pages
Book Rating : 4.6/5 (423 download)
Download or read book Polyploidy and Genome Evolution written by Pamela Soltis and published by Springer Science & Business Media. This book was released on 2012-10-03 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyploidy – whole-genome duplication (WGD) – is a fundamental driver of biodiversity with significant consequences for genome structure, organization, and evolution. Once considered a speciation process common only in plants, polyploidy is now recognized to have played a major role in the structure, gene content, and evolution of most eukaryotic genomes. In fact, the diversity of eukaryotes seems closely tied to multiple WGDs. Polyploidy generates new genomic interactions – initially resulting in “genomic and transcriptomic shock” – that must be resolved in a new polyploid lineage. This process essentially acts as a “reset” button, resulting in genomic changes that may ultimately promote adaptive speciation. This book brings together for the first time the conceptual and theoretical underpinnings of polyploid genome evolution with syntheses of the patterns and processes of genome evolution in diverse polyploid groups. Because polyploidy is most common and best studied in plants, the book emphasizes plant models, but recent studies of vertebrates and fungi are providing fresh perspectives on factors that allow polyploid speciation and shape polyploid genomes. The emerging paradigm is that polyploidy – through alterations in genome structure and gene regulation – generates genetic and phenotypic novelty that manifests itself at the chromosomal, physiological, and organismal levels, with long-term ecological and evolutionary consequences.
Author : United States. Office of Experiment Stations
Publisher :
ISBN 13 :
Total Pages : 1074 pages
Book Rating : 4.:/5 ( download)
Download or read book Experiment Station Record written by United States. Office of Experiment Stations and published by . This book was released on 1940 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 632 pages
Book Rating : 4.E/5 ( download)
Download or read book Plant Science Literature written by and published by . This book was released on 1940 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
