Resultados de Pesquisa

INGLÊS

Meiotic Configurations - A Source Of Information For Estimating Genetic Parameters

de J. Sybenga

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The aim of the monographs is to foster effective intra- and interdisciplinary communication between geneticists, and plant and animal breeders. This is to be achieved by publishing authoritative up-to-date texts; concise, but at the same time comprehensive, monographs, and multiauthor volumes on theoretical and applied genetics. The following broad fields of genetics and breeding are within the scope of the series: Evolutionary genetics Developmental genetics Population genetics Biochemical genetics Ecological genetics Somatic cell genetics Biometrical genetics Agricultural genetics Cytogenetics Mutation breeding Radiation genetics Breeding methodology Acceptable subjects for the Monographs on Theoretical and Applied Genetics are basic and applied aspects of genetic variation; genetic resources; genetic exchange and reproduction; mutagenesis; genotype-environment interaction; gene structure, regulation, action, expression and interaction; chromosomal and extrachromosomal inheritance ofeconomic traits, and genetic models and simulations. September 1975 The Editors Preface Meiotic configurations are looked at from a special point of view in this book: the extraction from them of the maximal amount of quantitative information of genetic interest. Although this requires a certain understanding of their origin and consequences, much of what is known about chromosomes and their for mation into the special structures collected under the rather indiscriminate term I "configuration", is not considered relevant for this purpose, and simply neglected.
INGLÊS

Pollination Mechanisms, Reproduction And Plant Breeding

de Esra Galun e R. Frankel

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 view than its own proper males should fecundate each blossom." ANDREW KNIGHT Philosophical Transactions, 1799 Pollination mechanisms and reproduction have a decisive bearing upon rational procedures in plant breeding and crop production. This book intends to furnish'' under one cover an integrated botanical, genetical and breeding-methodologi cal treatment of the reproductive biology of spermatophytes mainly angiosperms; it is based on an advanced topical course in plant breeding taught at the Hebrew University of Jerusa lem. We have tried to present a coverage which is concise, but as comprehensive as possible, of the pollination mechanism and modes of reproduction of higher plants, and to illustrate topics, whenever practicable, by examples from cultivated plants. Nevertheless, some relevant publications may have escaped our attention or may not be mentioned because of various limitations. The book is organized into three parts. The first part starts with an evaluation of the significance of the different pollination mechanisms for plant breeding and crop produc tion, describes modes of reproduction in higher plants and discusses ecology and dynamics of pollination. The second part is devoted to crops propagated by self pollination and describes specific breeding procedures for such crops. The third part details sexual reproduction in higher plants and handles three mechanisms involved in the prevention of self pollination and their utilization in plant breeding: sex expres sion, incompatibility, and male sterility.
INGLÊS

Gene Interactions In Development

de L. I. Korochkin

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Recently three important conclusions have been derived (Davidson and Britten, 1979) which help to pose the problem in a new way: 1) Only a small part of single copy sequences of DNA is represented in nuclear RNA of a given type of cell or tissue: 10% to 20% in sea urchin embryos, 11 % in rat liver, 4% to 6% in Drosophila cell culture, etc.
INGLÊS

Molecular Theory Of Radiation Biology

de H. P. Leenhouts e K. H. Chadwick

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 In late 1971 we were involved in a study of the interaction of radiation with matter and were trying to use measurements of radiation fluorescence in biological molecules to indicate how radiation affected living cells.
INGLÊS

Heterosis - Reappraisal Of Theory And Practice

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 When trying to solicit authors for this book it became apparent that the causal factors for heterosis at the physiological and biochemical level are today almost as obscure as they were 30 years ago. Though biometrical-genetical analyses point to dispersion of complementary genes - not overdominance - as the major cause of the phenomenon, plant breeders'' experience still suggests a cautious, pragmatic approach to the dominance-overdominance controversy in breeding hybrid cultivars. Thus we are faced with a striking discordance between our limited comprehension of the causal factors and mechanism of heter osis on the one hand, and the extensive agricultural practice of utiliza tion of hybrid vigor on the other. Such utilization is the result of the economic value of hybrid combinations displaying superior yields and qualities as well as stability of performance, of benefits derived in breeding programs, and of the enhanced varietal protection of proprietary rights. No comprehensive and critical analysis of the phenomenon of heterosis in economic plants has been published for the last three decades since the now classical book Heterosis, edited by J . W. Gowen (Iowa State College Press, Ames, Iowa, 1952). The present book attempts to fill the gap and to assess the status of our present knowl edge of the concept, the basis, the extent, and the application of heterosis in economic plants.
INGLÊS

Induced Mutations In Plant Breeding

de G. Wolff e W. Gottschalk

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Mutation breeding has been introduced into modern plant breeding in the early 1940''s. In spite of pessimistic predictions, the application of experimental mutagenesis has led to encouraging results demonstrating that mutation breeding is a well-functioning method in many crops. So far, more than 500 varieties, developed by means of induced mutations, have been officially released; others have been approved for registration. Many mutants with characters of agronomic interest cannot be utilized directly because of their unsatisfying yielding capacities, or of other negative traits which are partly due to the pleiotropic action of the mutant genes. Sometimes their negative selection value can be overcome by transferring them into the genomes of other varieties. According to experience available, the efficiency of mutant genes can conSiderably vary depending on the genotypic background in which they become effective. The interactions between mutant genes and genotypic back ground cannot be predicted. Therefore, mutants with valuable traits should be crossed with many varieties and strains in order to discern positive and negative interactions. In this way, genotypes can be selected in which the mutant gene is able to express its action without showing negative by-effects. This procedure has been used for about 10 years by combining the methods of mutation and crossbreeding. Mutation breeding is predominantly used in annual diploid and allo polyploid self-fertilizing crops, while it causes much more difficulties in cross-pollinating species.
INGLÊS

Male Sterility In Higher Plants

de Mohan L.H. Kaul

171,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The Predominance of species exhibiting genic male sterility and of species crosses exhibiting gene-cytoplasmic male sterility is due to the fact that for the male sterility expression in the former, mutation of nuclear genes is required, but in the latter, mutations of both nuclear and cytoplasmic genes are necessary.
INGLÊS

Wheat Rusts - Breeding For Resistance

de Douglas R. Knott

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The idea for this book was conceived by the late Dr. Irvine A. Dr. Watson's intention was to produce a very practical book that would provide wheat breeders with all of the information necessary to breed success- fully for resistance to the three wheat rusts: leaf rust, stem rust, and yellow rust.
INGLÊS

Cytogenetics In Plant Breeding

de J. Sybenga

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Aimed primarily at plant breeders and geneticists, this text provides a basic knowledge on chromosome structure and function as well as methods on chromosome analysis and engineering. Numerous diagrams aid in explaining the complex phenomena.
INGLÊS

Genetic Improvement Of Tomato

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Presents a critical work on the genetic improvement of tomatoes, particularly aspects of cytology, genetics, breeding and biotechnology. Amongst the topics covered are mitosis and meiosis studies, linkage and mutagenesis, classical and molecular genetics and reproductive biology.
INGLÊS

Oenothera - Contributions Of A Plant To Biology

de Cornelia Harte

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Because of the great variety of problems which this genus presents to biologists, Oenothera belongs to the best-known genera of plants not used economically. This book summarizes today''s knowledge of Oenothera''s genetics and related fields like caryology and cytogenetics. It is further of great value for all those whose research topics are based on genetics, such as developmental and evolutionary biology.
INGLÊS

Distant Hybridization Of Crop Plants

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Wild taxa are invaluable sources of resistance to diseases, insects/ pests, nematodes, temperature extremes, salinity and alkalinity stresses, and also of nutritional quality; adaptation; genetic diversity and new species. Utilization of wild relatives of a crop depends largely upon its crossability relations with cultivated varieties. Sev eral wild species are not crossable with the commercial cultivars due to various isolation barriers. Furthermore, in a few cases, hybridiza tion is possible only in one direction and reciprocal crosses are not successful, thus depriving the utilization of desired cytoplasm of many species. However, techniques have been developed to over come many barriers and hybrid plants are produced. New crop species have been developed by overcoming the F 1 sterility and producing amphidiploids and such crops are commercially being grown in the field. The segregation pattern ofF 1 hybrids produced by distant hybridization in segregating generations are different from the intervarietal hybrids. In former cases, generally, unidirectional segregation takes place in early generations and accordingly, selec tion procedures are adopted. In most of the cases, backcross or modified backcross methods have been followed to utilize wild species, and thus numerous types of resistance and other economical attributes have been transferred in the recurrent parents. Protoplast fusion has been amply demonstrated in a number of cases where sexual hybridization was not possible and, as a result, hybrids have been produced.
INGLÊS

Heterosis And Hybrid Rice Breeding

de Sant Singh Virmani

95,40€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Rice is the most important food crop of the developing world and the demand for it is growing. Provided here is a concise account of hybrid breeding in rice, a newly deployed breeding approach to increase the yield. Research on heterosis, male sterility systems, outcrossing mechanisms, disease/insect management, and grain quality considerations in hybrid rice are reviewed. The book contains a wealth of useful information for practicing hybrid rice breeders, seed producers, researchers, and students of plant breeding.
INGLÊS

Evolution And Function Of Heterostyly

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 A century of research on heterostylous plants has passedsince the publication of Charles Darwin's book "TheDifferent Forms of Flowers on Plants of the Same Species" in1877 summarizing his extensive observations and experimentson these complex breeding systems involving geneticpolymorphisms of floral sex organs.
INGLÊS

Petunia

95,40€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The solanaceous family is one of the most interesting and diverse plant groups among the dicotyledons. Plants of various genera are grown for their edible parts, for drugs, or for ornamental purposes. The six genera grown primarily as ornamental plants are: Browallia, Brunsfelsia, Datura, Nicotiana, Petunia, and Salpiglossis. Of these, Petunia is the most economically important in terms of worldwide use as an ornamental plant. In addition to its horticultural value and prominence, the genus Petunia plays a key role as experimental plant material in a broad range of horticultural and biological research endeavors. Because of the broad range of commercial and research interest in Petunia, the collaborating authors believed it was appropiate to prepare a monograph dealing in a comprehensive manner with all economic and biological facets of the genus Petunia. The authors sincerely hope that this monograph will be of resource value and stimulating to students, researchers, and workers in industry interested in having a compendium of the knowledge available on the genus Petunia. KENNETH C. SINK Contents Introduction. By K. C. Sink 1 1.1 Survey of Petunia as a Research Species 1 2 1.2 Survey of Petunia as an Economic Plant Species 2 Taxonomy. By K. C. Sink ....... 3 2.1 Geographical Distribution ...... 3 2.2 Status of Petunia Within the Solanaceae 3 2.3 Early Taxonomie Studies . . . . . . . 4 2.4 Species Described by Fries, Steere, Smith, and Downes 5 ...... 7 2.5 Origin of the Cultivated P. hybrida Vilm.
INGLÊS

Incompatibility In Angiosperms

de D. De Nettancourt

95,40€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Attempting to collect, sort out, comment on and summarize from available literature the relevant information dealing with a specific problem is always a difficult task which necessarily involves sub jective choices and implies a considerable risk of errors and omis sions. The difficulty is increased when, as in the case of incompati bility in angiosperms, the subject to be treated traces its history to preDarwinian times and reflects the total sum of numerous in vestigations dealing with widely different disciplines, such as ge netics, cytology, biochemistry, systematics and physiology, which no single reviewer may pretend to master sufficiently to avoid completely the possibility of misinterpretation. Furthermore, the complexity of the task is further augmented by the fact that the student of incompatibility, confronted as he or she is with still poorly understood phenomena of genetic control and molecular recognition, often tends to be speculative and, in some instances, over-imaginative at the time of fitting research observations and experimental data into appropriate models, schemes and hypo theses. The compensation for such a state of affair is, however, a strong one and lies in the remarkable willingness and readiness of "in compatibilists" to cooperate, and to provide information, ex planations and illustrations to anyone attempting to penetrate into their universe of research and of reflection.
INGLÊS

Tree Breeding: Principles And Strategies - Principles And Strategies

de G. Namkoong, H. C. Kang e J. S. Brouard

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The presentation is organized around the development of breeding from single-to multiple-option plans, from single to multiple traits, from single to mUltiple environ- ments, and from single to multiple populations.
INGLÊS

Population Dynamics And The Tribolium Model: Genetics And Demography

de Robert A. Desharnais e Robert F. Costantino

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The study of populations is becoming increasingly focused on dynamics. We believe there are two reasons for this trend. The ftrst is the impactof nonlinear dynamics with its exciting ideas and colorful language: bifurcations, domains of attraction, chaos, fractals, strange attractors. Complexity, which is so very much a part of biology, now seems to be also a part of mathematics. A second trend is the accessibility of the new concepts. Thebarriers tocommunicationbetween theoristandexperimentalistseemless impenetrable. The active participationofthe experimentalist means that the theory will obtain substance. Our role is the application of the theory of dynamics to the analysis ofbiological populations. We began our work early in 1979 by writing an ordinary differential equation for the rateofchange in adult numbers which was based on an equilibrium model proposed adecadeearlier. Duringthenextfewmonths weftlledournotebookswithstraightforward deductions from the model and its associated biological implications. Slowly, some of the biological observations were explained and papers followed on a variety of topics: genetic and demographic stability, stationary probability distributions for population size,population growth asabirth-deathprocess, natural selectionanddensity-dependent population growth, genetic disequilibrium, and the stationary stochastic dynamics of adult numbers.
INGLÊS

Oenothera - Contributions Of A Plant To Biology

de Cornelia Harte

121,66€ + 10% EM CARTÃO

portes grátis

 Because of the great variety of problems which this genus presents to biologists, Oenothera belongs to the best-known genera of plants not used economically. It is further of great value for all those whose research topics are based on genetics, such as developmental and evolutionary biology.
INGLÊS

Biotechnology In Forage And Turf Grass Improvement

de German Spangenberg, Ingo Potrykus e Zeng-Yu Wang

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA
INGLÊS

Cytogenetics Of The Festuca-Lolium Complex - Relevance To Breeding

de Prem P. Jauhar

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA
INGLÊS

Soil Mineral Stresses - Approaches To Crop Improvement

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA
INGLÊS

Breeding Oilseed Brassicas

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA
INGLÊS

Biotechnology In Forage And Turf Grass Improvement

de German Spangenberg, Ingo Potrykus e Zeng-Yu Wang

121,66€ + 10% EM CARTÃO

portes grátis
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