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The Effect Of Polyploidy And Apomixis On The Evolution Os Species In Crepis
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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.
Book Synopsis Apomixis in Angiosperms by : Tamara N. Naumova
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.
Book Synopsis Studies in the Opuntioideae (Cactaceae) by : David R. Hunt
Download or read book Studies in the Opuntioideae (Cactaceae) written by David R. Hunt and published by . This book was released on 2002 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polyploidy and Genome Evolution by : Pamela Soltis
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.
Book Synopsis The Genus Crepis: The taxonomy, phylogeny, distribution, and evolution of Crepis by : Ernest Brown Babcock
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:
Book Synopsis Apomixis in Plants by : Lenn Jerling
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.
Book Synopsis Plant Biosystematics by : William F. Grant
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.
Book Synopsis Natural Hybridization and Evolution by : Michael L. Arnold
Download or read book Natural Hybridization and Evolution written by Michael L. Arnold and published by Oxford University Press. This book was released on 1997-01-30 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Michael L. Arnold offers an exploration of the evolutionary process of natural hybridisation, and presents data from various sources that support the paradigm of natural hybridisation as an important evolutionary process.
Book Synopsis Index of Research Projects ... by : United States. Work Projects Administration
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:
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:
Book Synopsis The American Species of Crepis by : Ernest Brown Babcock
Download or read book The American Species of Crepis written by Ernest Brown Babcock and published by . This book was released on 1938 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of the Arnold Arboretum by : Arnold Arboretum
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..."
Book Synopsis Embryology of Angiosperms by : B. M. Johri
Download or read book Embryology of Angiosperms written by B. M. Johri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty-four years have elapsed since the publication of the late Professor P. Maheshwari's text, An Introduction to the Embryology of Angiosperms, a work which for many years served as an invaluable guide for students and a rich source book for research workerso Various texts dealing with sections of the braad spectrum oftopics encompassed by Maheshwari in his book have appeared in the interim, but a compendious modem work dealing with the whole field has been lacking. This present volume splendidly meets the need, and it is altogether fitting that Professor B. M. lohri, long an associate and close colleague of Professor Maheshwari and himself a prolific contributor to the subject, should have undertaken the task of editing it. When Maheshwari wrote, it was stiIl feasible for one author to handIe the subject, but today even someone with his fine bread th of vision and depth of understanding could not, alone, do it justice. So the effort has to be a collaborative one; and Professor lohri's achievement has been to bring together a team of authoritative collaborators, assign them their responsibilities, and put them to work to produce a text as integrated in its treatment as the diversity of the subject would allow. The product vividly illustrates the advances that have been made in the study of angiosperm reproductive systems in the last 30 years, and the book is surely destined to become the new standard for student and researcher alike.
Book Synopsis The Genus Crepis by : Ernest Brown Babcock
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:
Book Synopsis Botany and the Evolutionary Synthesis by : Vassiliki Betty Smocovitis
Download or read book Botany and the Evolutionary Synthesis written by Vassiliki Betty Smocovitis and published by . This book was released on 1988 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reproductive Versatility in the Grasses by : Geoffrey Peter Chapman
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.
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:
