Download or read book The Genetics of Prolificacy in Corn written by Robert Lovell Ellsworth and published by . This book was released on 1971 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Inheritance of Prolificacy in Corn Z e a M a y s L written by Jose Francisco F. De Toledo and published by . This book was released on 1978 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The association of prolificacy with yield has been recently well documented. Other advantages of prolific maize are resistance to barrenness and tolerance of environmental stress. Therefore, prolificacy is an important component of corn; knowledge of its inheritance would be of great value to plant breeders in their efforts to improve yield. The mode of inheritance of the prolific potential is still a point of controversy. There are some reports which indicate a relatively simple mode of inheritance with relatively high heritability, especially when compared to heritability of yield. However, there are other reports which indicate that prolificacy may be influenced by many environmental components. The purpose of this work was to test a two-locus model of inheritance for prolificacy as proposed by Harris (1974). Certain other questions raised by the work of Harris, such as the effect of environment on prolificacy, were also investigated here.

Download or read book Inheritance of Prolificacy and Maturity in Crosses of Southern X Northern Maize Germ Plasm written by Farrell Mull Bagshaw and published by . This book was released on 1963 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on the Inheritance and Physiology of Prolificacy in Maize written by Mark Earl Sorrells and published by . This book was released on 1977 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: In two different experiments, the inheritance of prolificacy, and the relationship of multiple ear development to time intervals between developmental stages of reproductive structures were studied in maize (Zea mays L.) using both quantitative and' qualitative methods of' genetic analysis. The inheritance of time intervals between initiation of tassel and ear shoot meristems was examined in a third experimento A six-line partial diallel involving unrelated parents, F1's, and F2's were gro__ at plant densities of 17,200 and 34,400 plants/ha over two years. General (GCA) and speci-fie (SCA) combining ability effects were significant forboth ear number and multiple-ear-weight index (_JEWI) with GCA:SCA ratios ranging irem 12:1 to 18:1 for ear number and irem 8:1 to 21:1 for mIT. Positive phenotypic and genotypic correlations were obtained between the time intervals, first-to-second ear shoot emergence and first-to-second silk. Also, silking interval was negatively correlated with both ear number and MEWI. Among related inbred linest_eir F1's, F2's, and back-cresses, additive gene effects were highly significant for ear number and MEWI, and dominance effects were significant(0.05 leveI) for MEWI.Negative correlations were observed 4 between ear number and the time periods, ear shoot emergence-to-pollen-shed, first-to-second ear shoot emergence, and first-to-second silk. For the F1 and segregating generations of one pair of related liDes, a greater frequency of second ears occurred on plants having fewer nades above the first ear. ln both experiments, prolificacy factors segregated in a manner predictable trem the penetrance and genetic segre-gation inferred trem parents and F1 's. In addition, 'a meth-od is presented which permits genotypic classification of individual plants for testing segregation ratios and sub-sequent progeny testing. The garoe six parents and 15 F l' s as were used in the study on ear number were dissected daily and the dates of initiation of tassel and ear shoot meristems recorded.General combining ability effects were highly significant for the time periods tassel-to-first ear shoot initiation and firs'!;-to-second ear shoot ini tiation. Only the time period between ini tiation of the first and second ear shoot was correlated (0.01 leveI) with both ear number and MEWI.

Download or read book Inheritance of Prolificacy in Crosses of Selected Prolific and Non prolific Lines of Corn Zea Mays L written by Mohammadullah Obaidi and published by . This book was released on 1978 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corn written by C. Wayne Smith and published by John Wiley & Sons. This book was released on 2004-03-08 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt: Your all-in-one guide to corn. This book provides practical advice on planting techniques and rates, seed production, treating plant diseases, insect infestation and weeds, harvesting, processing, and worldwide utilization. This is the fourth, and final, volume in the series of comprehensive references on the major crops of the world. Covers new biotechnology techniques for plant breeding and pest management Provides practical advice on planting techniques and rates, seed production, treating plant diseases, insect infestation and weeds, harvesting, processing and worldwide utilization.

Download or read book Quantitative Genetics in Maize Breeding written by Arnel R. Hallauer and published by Springer Science & Business Media. This book was released on 2010-09-28 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maize is used in an endless list of products that are directly or indirectly related to human nutrition and food security. Maize is grown in producer farms, farmers depend on genetically improved cultivars, and maize breeders develop improved maize cultivars for farmers. Nikolai I. Vavilov defined plant breeding as plant evolution directed by man. Among crops, maize is one of the most successful examples for breeder-directed evolution. Maize is a cross-pollinated species with unique and separate male and female organs allowing techniques from both self and cross-pollinated crops to be utilized. As a consequence, a diverse set of breeding methods can be utilized for the development of various maize cultivar types for all economic conditions (e.g., improved populations, inbred lines, and their hybrids for different types of markets). Maize breeding is the science of maize cultivar development. Public investment in maize breeding from 1865 to 1996 was $3 billion (Crosbie et al., 2004) and the return on investment was $260 billion as a consequence of applied maize breeding, even without full understanding of the genetic basis of heterosis. The principles of quantitative genetics have been successfully applied by maize breeders worldwide to adapt and improve germplasm sources of cultivars for very simple traits (e.g. maize flowering) and very complex ones (e.g., grain yield). For instance, genomic efforts have isolated early-maturing genes and QTL for potential MAS but very simple and low cost phenotypic efforts have caused significant and fast genetic progress across genotypes moving elite tropical and late temperate maize northward with minimal investment. Quantitative genetics has allowed the integration of pre-breeding with cultivar development by characterizing populations genetically, adapting them to places never thought of (e.g., tropical to short-seasons), improving them by all sorts of intra- and inter-population recurrent selection methods, extracting lines with more probability of success, and exploiting inbreeding and heterosis. Quantitative genetics in maize breeding has improved the odds of developing outstanding maize cultivars from genetically broad based improved populations such as B73. The inbred-hybrid concept in maize was a public sector invention 100 years ago and it is still considered one of the greatest achievements in plant breeding. Maize hybrids grown by farmers today are still produced following this methodology and there is still no limit to genetic improvement when most genes are targeted in the breeding process. Heterotic effects are unique for each hybrid and exotic genetic materials (e.g., tropical, early maturing) carry useful alleles for complex traits not present in the B73 genome just sequenced while increasing the genetic diversity of U.S. hybrids. Breeding programs based on classical quantitative genetics and selection methods will be the basis for proving theoretical approaches on breeding plans based on molecular markers. Mating designs still offer large sample sizes when compared to QTL approaches and there is still a need to successful integration of these methods. There is a need to increase the genetic diversity of maize hybrids available in the market (e.g., there is a need to increase the number of early maturing testers in the northern U.S.). Public programs can still develop new and genetically diverse products not available in industry. However, public U.S. maize breeding programs have either been discontinued or are eroding because of decreasing state and federal funding toward basic science. Future significant genetic gains in maize are dependent on the incorporation of useful and unique genetic diversity not available in industry (e.g., NDSU EarlyGEM lines). The integration of pre-breeding methods with cultivar development should enhance future breeding efforts to maintain active public breeding programs not only adapting and improving genetically broad-based germplasm but also developing unique products and training the next generation of maize breeders producing research dissertations directly linked to breeding programs. This is especially important in areas where commercial hybrids are not locally bred. More than ever public and private institutions are encouraged to cooperate in order to share breeding rights, research goals, winter nurseries, managed stress environments, and latest technology for the benefit of producing the best possible hybrids for farmers with the least cost. We have the opportunity to link both classical and modern technology for the benefit of breeding in close cooperation with industry without the need for investing in academic labs and time (e.g., industry labs take a week vs months/years in academic labs for the same work). This volume, as part of the Handbook of Plant Breeding series, aims to increase awareness of the relative value and impact of maize breeding for food, feed, and fuel security. Without breeding programs continuously developing improved germplasm, no technology can develop improved cultivars. Quantitative Genetics in Maize Breeding presents principles and data that can be applied to maximize genetic improvement of germplasm and develop superior genotypes in different crops. The topics included should be of interest of graduate students and breeders conducting research not only on breeding and selection methods but also developing pure lines and hybrid cultivars in crop species. This volume is a unique and permanent contribution to breeders, geneticists, students, policy makers, and land-grant institutions still promoting quality research in applied plant breeding as opposed to promoting grant monies and indirect costs at any short-term cost. The book is dedicated to those who envision the development of the next generation of cultivars with less need of water and inputs, with better nutrition; and with higher percentages of exotic germplasm as well as those that pursue independent research goals before searching for funding. Scientists are encouraged to use all possible breeding methodologies available (e.g., transgenics, classical breeding, MAS, and all possible combinations could be used with specific sound long and short-term goals on mind) once germplasm is chosen making wise decisions with proven and scientifically sound technologies for assisting current breeding efforts depending on the particular trait under selection. Arnel R. Hallauer is C. F. Curtiss Distinguished Professor in Agriculture (Emeritus) at Iowa State University (ISU). Dr. Hallauer has led maize-breeding research for mid-season maturity at ISU since 1958. His work has had a worldwide impact on plant-breeding programs, industry, and students and was named a member of the National Academy of Sciences. Hallauer is a native of Kansas, USA. José B. Miranda Filho is full-professor in the Department of Genetics, Escola Superior de Agricultura Luiz de Queiroz - University of São Paulo located at Piracicaba, Brazil. His research interests have emphasized development of quantitative genetic theory and its application to maize breeding. Miranda Filho is native of Pirassununga, São Paulo, Brazil. M.J. Carena is professor of plant sciences at North Dakota State University (NDSU). Dr. Carena has led maize-breeding research for short-season maturity at NDSU since 1999. This program is currently one the of the few public U.S. programs left integrating pre-breeding with cultivar development and training in applied maize breeding. He teaches Quantitative Genetics and Crop Breeding Techniques at NDSU. Carena is a native of Buenos Aires, Argentina. http://www.ag.ndsu.nodak.edu/plantsci/faculty/Carena.htm

Download or read book Maydica written by and published by . This book was released on 2007 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Journal devoted to maize and allied species.

Download or read book Principles of Plant Genetics and Breeding written by George Acquaah and published by John Wiley & Sons. This book was released on 2020-12-14 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: The revised edition of the bestselling textbook, covering both classical and molecular plant breeding Principles of Plant Genetics and Breeding integrates theory and practice to provide an insightful examination of the fundamental principles and advanced techniques of modern plant breeding. Combining both classical and molecular tools, this comprehensive textbook describes the multidisciplinary strategies used to produce new varieties of crops and plants, particularly in response to the increasing demands to of growing populations. Illustrated chapters cover a wide range of topics, including plant reproductive systems, germplasm for breeding, molecular breeding, the common objectives of plant breeders, marketing and societal issues, and more. Now in its third edition, this essential textbook contains extensively revised content that reflects recent advances and current practices. Substantial updates have been made to its molecular genetics and breeding sections, including discussions of new breeding techniques such as zinc finger nuclease, oligonucleotide directed mutagenesis, RNA-dependent DNA methylation, reverse breeding, genome editing, and others. A new table enables efficient comparison of an expanded list of molecular markers, including Allozyme, RFLPs, RAPD, SSR, ISSR, DAMD, AFLP, SNPs and ESTs. Also, new and updated “Industry Highlights” sections provide examples of the practical application of plant breeding methods to real-world problems. This new edition: Organizes topics to reflect the stages of an actual breeding project Incorporates the most recent technologies in the field, such as CRSPR genome edition and grafting on GM stock Includes numerous illustrations and end-of-chapter self-assessment questions, key references, suggested readings, and links to relevant websites Features a companion website containing additional artwork and instructor resources Principles of Plant Genetics and Breeding offers researchers and professionals an invaluable resource and remains the ideal textbook for advanced undergraduates and graduates in plant science, particularly those studying plant breeding, biotechnology, and genetics.

Download or read book Proceedings written by American Genetic Association and published by . This book was released on 1911 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Breeders' directory" (list of numbers) in v. 1-3.

Download or read book Specialty Corns written by Arnel R. Hallauer and published by CRC Press. This book was released on 2000-08-23 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated, the Second Edition of Specialty Corns includes everything in the first edition and more. Considered the standard in this field, significant changes have been made to keep all the information current and bring the references up-to-date. Two new chapters have been added to keep up with the latest trends: Blue Corn and

Download or read book Plant Breeding Reviews Volume 9 written by Jules Janick and published by John Wiley & Sons. This book was released on 2010-04-20 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant Breeding Reviews is an ongoing series presenting state-of-the art review articles on research in plant genetics, especially the breeding of commercially important crops. Articles perform the valuable function of collecting, comparing, and contrasting the primary journal literature in order to form an overview of the topic. This detailed analysis bridges the gap between the specialized researcher and the broader community of plant scientists.

Download or read book Report written by American Genetic Association and published by . This book was released on 1911 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Genomics Crop Plants written by Om P. Rajora and published by Springer Nature. This book was released on with total page 947 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Management in Crop Production written by Nand Kumar Fageria and published by CRC Press. This book was released on 2014-06-25 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main approaches for safeguarding food security, sustainable development has increased demand for knowledge on fertilizer management in crop production. Among essential plant nutrients, nitrogen is one of the most important yield-limiting nutrients, mainly responsible for determining yield and yield components in cereals and legumes. It is also responsible for the activation of many enzymes and, of course, plays an important role in photosynthesis. With a recovery efficiency of less than 50 percent in most cropping systems, a large portion of the nitrogen applied as fertilizer is not used by plants, creating environmental and economic issues. Nitrogen Management in Crop Production covers the critical aspects for the judicious use of nitrogen in cropping systems. This includes appropriate methods of nitrogen application, effective source and timing of application during crop growth cycles, use of an adequate application rate to avoid loss and reduce cost, use of nitrogen-efficient crop genotypes, and use of legumes that fix sufficient amounts of atmospheric nitrogen. There is also a chapter on organic matter and its role in sustainability. This book presents recent information from the international literature, making it relevant for most agroecological regions. Chapters provide experimental results to aid in practical application of the information. The book contains color photos of nitrogen deficiency symptoms to serve as a guide for important crop species, such as rice, dry bean, wheat, soybean, and corn. It also includes numerous tables and figures, providing an easy-to-read reference.

Download or read book First the Seed written by Jack Ralph Kloppenburg and published by Univ of Wisconsin Press. This book was released on 2005-04-26 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: First the Seed spotlights the history of plant breeding and shows how efforts to control the seed have shaped the emergence of the agricultural biotechnology industry. This second edition of a classic work in the political economy of science includes an extensive, new chapter updating the analysis to include the most recent developments in the struggle over the direction of crop genetic engineering. 1988 Cloth, 1990 Paperback, Cambridge University Press Winner of the Theodore Saloutos Award of the Agricultural History Society Winner of the Robert K. Merton Award of the American Sociological Association