Download or read book Performance of Multiple eared Inbred Lines in Three way Hybrids written by Farrell Mull Bagshaw and published by . This book was released on 1959 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison Among Amize Hybrid Made from Unselected Lines Developed by Selfing and Full sibbing written by E. Lopez-Perez and published by . This book was released on 1977 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the increasing trend to the production of single crosses, rather than double crosses or three-way crosses of corn, plant breeders are trying to select out, bydifferent methods, more productive inbred lines that preform better in single-cross hybrids. Two different methods of inbreeding (selfing and full-sibbing) were used to develop unselected inbred lines to produce single-, three-way-, and double-cross hybrids. F2 generations were produced from most of these hybrids. Hybrids were produced from lines at two differnt levels of inbreeding (50 and almost 100% homozygosity). Lines with F = 50% were obtainded fater one generation of selfing (S1) while the lines with as inbreeding coefficient F = 99.6% were obtaindec after eight generations of continuousselfing (S8). It was necessary to conduct three generations of full-sibbing to obtain lines with F + 50% and ten generations of fuu-sibbing plus three generations of selfing to obtain lines nearly homozygous (FS10S3, F = 98.6%). All the hybrids (12), some of their F2's (8), and five check varieties were grown in five locations (Kanawha, Ames, Agronomy Researcg Center; Ames, Hinds Farm, Ankehy, and Martinsburg) in 1976. For each location the following traits were recorded: stand, kernel depth, second ears per entry, ear height, ear length, ear diameter, cob diameter, cob diameter, 300-kernel weight, and yield. Each experimental included three replications. A series of orthogonal comparisons were developed for all these traits combined across the five (...).

Download or read book Journal of Agricultural Research written by and published by . This book was released on 1941 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 GGE Biplot Analysis written by Weikai Yan and published by CRC Press. This book was released on 2002-08-28 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research data is expensive and precious, yet it is seldom fully utilized due to our ability of comprehension. Graphical display is desirable, if not absolutely necessary, for fully understanding large data sets with complex interconnectedness and interactions. The newly developed GGE biplot methodology is a superior approach to the graphical analys

Download or read book Progress Report written by and published by . This book was released on 1966 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Extension Bulletin written by Oklahoma A & M College and published by . This book was released on 1944 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Maize research in 1995 96 written by and published by CIMMYT. This book was released on with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiment Station Record written by U.S. Office of Experiment Stations and published by . This book was released on 1935 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiment Station Record written by and published by . This book was released on 1934 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Meeting the challenges of global climate change and food security through innovative maize research Proceedings of the National Maize Workshop of Ethiopia 3 Addis Ababa Ethiopia 18 20 April 2011 written by and published by CIMMYT. This book was released on with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Circular written by and published by . This book was released on 1944 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by Iowa Corn Research Institute, Ames and published by . This book was released on 1944 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Integrated Approaches to Higher Maize Productivity in the New Millennium written by and published by CIMMYT. This book was released on 2004 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiment Station Report written by and published by . This book was released on 1947 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Genomics of Cultivated Palms written by V Arunachalam and published by Elsevier. This book was released on 2011-12-12 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioinformatics offers novel tools and resources to analyze plant genomes and genes. The complete genomes of two important commercial palms (dates and oil palm) have recently been sequenced. This offers scope for many computational tools to decipher the synteny, collinearity and common and unique genes of palms. This book reviews the latest developments in this field. Includes the latest information on the molecular breeding and bioinformatics of palms Covers past and current work and future opportunities Written in simple language avoiding technical jargon