Evaluation Of Argentine Maize Hybrids And Exotic X Temperate Testcrosses Across Environments

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Evaluation of Argentine Maize Hybrids and Exotic X Temperate Testcrosses Across Environments

Author : Brett A. Ochs
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (759 download)

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Book Synopsis Evaluation of Argentine Maize Hybrids and Exotic X Temperate Testcrosses Across Environments by : Brett A. Ochs

Download or read book Evaluation of Argentine Maize Hybrids and Exotic X Temperate Testcrosses Across Environments written by Brett A. Ochs and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Maize (Zea mays L.) is grown in a wide range of environments and altitudes worldwide. Maize has transitioned from open pollinated varieties to single cross hybrids over the last century. While maize production and genetic gain has increased, genetic diversity among U.S. maize hybrids has narrowed. Problems, such as insect pressure, diseases, and mycotoxins, present obstacles for breeders. One approach is to use exotic germplasm in breeding programs to provide useful, novel alleles for productivity, grain quality, and disease resistance. Little exotic germplasm has been used, because of lack of agronomic adaptation and problems with lodging, earliness, and tall plants in more temperate areas. Using exotic elite materials and evaluating them in targeted regions might increase success. Objectives of this research were: to characterize and evaluate agronomic adaptation and performance of Argentine commercial hybrids in the U.S., to evaluate semi-exotic testcrosses developed from semi adapted 100% tropical lines and elite U.S. inbred LH195, and to estimate response to aflatoxin contamination of Argentine hybrids and semi-exotic testcrosses under inoculation with Aspergillus flavus. Agronomic data was collected during 2004 in eleven Texas environments for Argentine hybrids, and eight Texas environments for semi-exotic testcrosses. Response to aflatoxin was measured in three southern Texas environments. U.S. commercial hybrids were used as checks. Significant differences among hybrids were observed for most environments and traits. In general, Argentine hybrids yielded lower, had lower 1000 kernel weights, and greater test weights than U.S. hybrids. Hybrids AX889, AX882MG, and AX890MG were competitive with U.S. hybrids for grain yield and were stable across environments. Semi-exotic testcrosses had similar lodging and grain moisture percentages, heavier test weights and competitive grain yields compared with U.S. hybrids. Hybrid TX-LAMA2002-9-2-B/lH195 had the highest overall grain yield mean for semi-exotic testcrosses and yielded better than two U.S. hybrids. Argentine hybrids had lower aflatoxin concentration than U.S. hybrids; several hybrids had less than 50 ng g−1 aflatoxin. Semi-exotic testcrosses had reduced aflatoxin compared to U.S. hybrids, with several hybrids under 35 ng g−1. These elite, exotic materials show promise for breeding programs, with competitiveness for grain yield, kernel traits, and reduced aflatoxin levels.

Multi-Location Evaluation of Agronomic Traits in Maize Hybrids

Author : Michael Cody McKee
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (865 download)

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Book Synopsis Multi-Location Evaluation of Agronomic Traits in Maize Hybrids by : Michael Cody McKee

Download or read book Multi-Location Evaluation of Agronomic Traits in Maize Hybrids written by Michael Cody McKee and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Maize (Zea mays L.) is one of the main crops grown in the United States. Genetic improvement over the last century has seen a shift from using open-pollinated varieties to single cross hybrids. This has resulted in major grain yield gains and improved management methodologies. However, there is still concern about reduced genetic diversity in elite corn germplasm and the potential effects this could have on future maize productivity in the presence of numerous abiotic and biotic pressures. One solution to this issue is the incorporation of exotic germplasm into existing maize improvement programs. This exotic material must be evaluated and characterized because too much or poorly matched exotic material can lead to reduced productivity. The use of multiple environments representative to the target improvement area is the best way to determine the true potential of certain material. The objectives of this research were to: i) estimate the responses of hybrids to aflatoxin and their agronomic performance across a range of environments under inoculation with Aspergillus flavus; ii) identify the hybrids within each group that exhibit the lowest levels of contamination; iii) analyze the relationship between agronomic performance and aflatoxin accumulation; and iv) determine how Genotype x Environment interactions affect these traits. Agronomic data was collected in ten Texas environments in 2005 for hybrids created from yellow, white, and Quality Protein Maize material that was crossed with one of two elite temperate inbred testers, LH195 or LH210. Response to aflatoxin was measured in eight of these environments. U.S. commercial hybrids were used as checks. Significant differences between hybrids were observed at different environments for different traits. Overall the experimental hybrids had lower aflatoxin accumulation than the commercial checks. They also yielded lower and had lower test weights and 1000 kernel weights. However, there were some hybrids that were competitive with the commercial checks for these agronomic traits. The incorporation of this material into established U.S. lines could be beneficial with regards to aflatoxin accumulation and kernel quality, which could ultimately translate to higher yields and crop quality. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148414

Master's Theses Directories

Author :
Publisher :
ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Master's Theses Directories by :

Download or read book Master's Theses Directories written by and published by . This book was released on 2006 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".

GGE Biplot Analysis

Author : Weikai Yan
Publisher : CRC Press
ISBN 13 : 1420040375
Total Pages : 287 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis GGE Biplot Analysis by : Weikai Yan

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

Breeding Rice for Drought-prone Environments

Author : K. S. Fischer
Publisher : Int. Rice Res. Inst.
ISBN 13 : 9712201899
Total Pages : 106 pages
Book Rating : 4.7/5 (122 download)

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Book Synopsis Breeding Rice for Drought-prone Environments by : K. S. Fischer

Download or read book Breeding Rice for Drought-prone Environments written by K. S. Fischer and published by Int. Rice Res. Inst.. This book was released on 2003 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information available for other cereals and the limited or circumstantial evidence available for rice indicate that we can now breed varieties that have improved yield under drought and produce high yields in the good seasons. This manual aims to help plant breeders develop such varieties.

Maize genetic resources

Author :
Publisher : CIMMYT
ISBN 13 : 9789686923483
Total Pages : 108 pages
Book Rating : 4.9/5 (234 download)

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Book Synopsis Maize genetic resources by :

Download or read book Maize genetic resources written by and published by CIMMYT. This book was released on 1995 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Flowering of Apomixis

Author : Yves Savidan
Publisher : CIMMYT
ISBN 13 : 9789706480743
Total Pages : 260 pages
Book Rating : 4.4/5 (87 download)

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Book Synopsis The Flowering of Apomixis by : Yves Savidan

Download or read book The Flowering of Apomixis written by Yves Savidan and published by CIMMYT. This book was released on 2001 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Crop Stress and its Management: Perspectives and Strategies

Author : B. Venkateswarlu
Publisher : Springer Science & Business Media
ISBN 13 : 9400722206
Total Pages : 617 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Crop Stress and its Management: Perspectives and Strategies by : B. Venkateswarlu

Download or read book Crop Stress and its Management: Perspectives and Strategies written by B. Venkateswarlu and published by Springer Science & Business Media. This book was released on 2011-11-22 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crops experience an assortment of environmental stresses which include abiotic viz., drought, water logging, salinity, extremes of temperature, high variability in radiation, subtle but perceptible changes in atmospheric gases and biotic viz., insects, birds, other pests, weeds, pathogens (viruses and other microbes). The ability to tolerate or adapt and overwinter by effectively countering these stresses is a very multifaceted phenomenon. In addition, the inability to do so which renders the crops susceptible is again the result of various exogenous and endogenous interactions in the ecosystem. Both biotic and abiotic stresses occur at various stages of plant development and frequently more than one stress concurrently affects the crop. Stresses result in both universal and definite effects on plant growth and development. One of the imposing tasks for the crop researchers globally is to distinguish and to diminish effects of these stress factors on the performance of crop plants, especially with respect to yield and quality of harvested products. This is of special significance in view of the impending climate change, with complex consequences for economically profitable and ecologically and environmentally sound global agriculture. The challenge at the hands of the crop scientist in such a scenario is to promote a competitive and multifunctional agriculture, leading to the production of highly nourishing, healthy and secure food and animal feed as well as raw materials for a wide variety of industrial applications. In order to successfully meet this challenge researchers have to understand the various aspects of these stresses in view of the current development from molecules to ecosystems. The book will focus on broad research areas in relation to these stresses which are in the forefront in contemporary crop stress research.

Broadening the Genetic Base of Crop Production

Author : H. David Cooper
Publisher :
ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Broadening the Genetic Base of Crop Production by : H. David Cooper

Download or read book Broadening the Genetic Base of Crop Production written by H. David Cooper and published by . This book was released on 2001 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the previously neglected interface between the conservation of plant genetic resources and their utilization. Only through utilization can the potential value of conserved genetic resources be realized. However, as this book shows, much conserved germplasm has to be subjected to long-term pre-breeding and genetic enhancement before it can be used in plant breeding programs.The authors explore the rationale and approaches for such pre-breeding efforts as the basis for broadening the genetic bases of crop production. Examples from a range of major food crops are presented and issues analyzed by leading authorities from around the world.

Plant Breeding Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 1384 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Plant Breeding Abstracts by :

Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1994 with total page 1384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Plant Breeding in the Omics Era

Author : Rodomiro Ortiz Ríos
Publisher : Springer
ISBN 13 : 3319205323
Total Pages : 250 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Plant Breeding in the Omics Era by : Rodomiro Ortiz Ríos

Download or read book Plant Breeding in the Omics Era written by Rodomiro Ortiz Ríos and published by Springer. This book was released on 2015-09-16 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of plant breeding has grown rapidly in the last decade with breakthrough research in genetics and genomics, inbred development, population improvement, hybrids, clones, self-pollinated crops, polyploidy, transgenic breeding and more. This book discusses the latest developments in all these areas but explores the next generation of needs and discoveries including omics beyond genomics, cultivar seeds and intellectual and property rights. This book is a leading-edge publication of the latest results and forecasts important areas of future needs and applications.

Agronomy Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 434 pages
Book Rating : 4.:/5 (321 download)

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Book Synopsis Agronomy Abstracts by :

Download or read book Agronomy Abstracts written by and published by . This book was released on 1990 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).

Genomic Designing of Climate-Smart Cereal Crops

Author : Chittaranjan Kole
Publisher : Springer Nature
ISBN 13 : 3319933817
Total Pages : 321 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Genomic Designing of Climate-Smart Cereal Crops by : Chittaranjan Kole

Download or read book Genomic Designing of Climate-Smart Cereal Crops written by Chittaranjan Kole and published by Springer Nature. This book was released on 2020-02-28 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights modern methods and strategies to improve cereal crops in the era of climate change, presenting the latest advances in plant molecular mapping and genome sequencing. Spectacular achievements in the fields of molecular breeding, transgenics and genomics in the last three decades have facilitated revolutionary changes in cereal- crop-improvement strategies and techniques. Since the genome sequencing of rice in 2002, the genomes of over eight cereal crops have been sequenced and more are to follow. This has made it possible to decipher the exact nucleotide sequence and chromosomal positions of agroeconomic genes. Most importantly, comparative genomics and genotyping-by-sequencing have opened up new vistas for exploring available biodiversity, particularly of wild crop relatives, for identifying useful donor genes.

Maize and Grace

Author : James C. McCann
Publisher : Harvard University Press
ISBN 13 : 0674040740
Total Pages : 304 pages
Book Rating : 4.6/5 (74 download)

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Book Synopsis Maize and Grace by : James C. McCann

Download or read book Maize and Grace written by James C. McCann and published by Harvard University Press. This book was released on 2007-09-15 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sometime around 1500 AD, an African farmer planted a maize seed imported from the New World. That act set in motion the remarkable saga of one of the world’s most influential crops—one that would transform the future of Africa and of the Atlantic world. Africa’s experience with maize is distinctive but also instructive from a global perspective: experts predict that by 2020 maize will become the world’s most cultivated crop. James C. McCann moves easily from the village level to the continental scale, from the medieval to the modern, as he explains the science of maize production and explores how the crop has imprinted itself on Africa’s agrarian and urban landscapes. Today, maize accounts for more than half the calories people consume in many African countries. During the twentieth century, a tidal wave of maize engulfed the continent, and supplanted Africa’s own historical grain crops—sorghum, millet, and rice. In the metamorphosis of maize from an exotic visitor into a quintessentially African crop, in its transformation from vegetable to grain, and from curiosity to staple, lies a revealing story of cultural adaptation. As it unfolds, we see how this sixteenth-century stranger has become indispensable to Africa’s fields, storehouses, and diets, and has embedded itself in Africa’s political, economic, and social relations. The recent spread of maize has been alarmingly fast, with implications largely overlooked by the media and policymakers. McCann’s compelling history offers insight into the profound influence of a single crop on African culture, health, technological innovation, and the future of the world’s food supply.

Specialty Corns

Author : Arnel R. Hallauer
Publisher : CRC Press
ISBN 13 : 1420038567
Total Pages : 492 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Specialty Corns by : Arnel R. Hallauer

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

Doubled haploid technology in maize breeding: theory and practice

Author :
Publisher : CIMMYT
ISBN 13 : 6078263005
Total Pages : 57 pages
Book Rating : 4.0/5 (782 download)

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Book Synopsis Doubled haploid technology in maize breeding: theory and practice by :

Download or read book Doubled haploid technology in maize breeding: theory and practice written by and published by CIMMYT. This book was released on with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mycotoxin Reduction in Grain Chains

Author : John F. Leslie
Publisher : John Wiley & Sons
ISBN 13 : 1118832868
Total Pages : 376 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Mycotoxin Reduction in Grain Chains by : John F. Leslie

Download or read book Mycotoxin Reduction in Grain Chains written by John F. Leslie and published by John Wiley & Sons. This book was released on 2014-04-29 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cereal grain safety from farm to table Mycotoxin Reduction in Grain Chains examines the ways in which food producers, inspectors, and processors can keep our food supply safe. Providing guidance on identification, eradication, and prevention at each stop on the "grain chain, this book is an invaluable resource for anyone who works with cereal grains. Discussions include breeding and crop management, chemical control, contamination prediction, and more for maize, wheat, sorghum, rice, and other major grains. Relevant and practical in the field, the lab, and on the production floor, this book features critical guidance for every point from farm to table.