Download or read book Identification and Validation of Genomic Regions Associated with Pre harvest Sprouting Resistance in White grained Wheat triticum Aestivum L written by Rajender Singh and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification and Validation of Genomic Regions Associated with Pre harvest Sprouting Resistance in White grained Wheat i triticum Aestivum i L written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic and Genomic Studies on Wheat Pre harvest Sprouting Resistance written by Meng Lin and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat pre-harvest sprouting (PHS), germination of physiologically matured grains in a wheat spike before harvesting, can cause significant reduction in grain yield and end-use quality. Many quantitative trait loci (QTL) for PHS resistance have been reported in different sources. To determine the genetic architecture of PHS resistance and its relationship with grain color (GC) in US hard winter wheat, a genome-wide association study (GWAS) on both PHS resistance and GC was conducted using in a panel of 185 U.S. elite breeding lines and cultivars and 90K wheat SNP arrrays. PHS resistance was assessed by evaluating sprouting rates in wheat spikes harvested from both greenhouse and field experiments. Thirteen QTLs for PHS resistance were identified on 11 chromosomes in at least two experiments, and the effects of these QTLs varied among different environments. The common QTLs for PHS resistance and GC were identified on the long arms of the chromosome 3A and 3D, indicating pleiotropic effect of the two QTLs. Significant QTLs were also detected on chromosome arms 3AS and 4AL, which were not related to GC, suggesting that it is possible to improve PHS resistance in white wheat. To identify markers closely linked to the 4AL QTL, genotyping-by-sequencing (GBS) technology was used to analyze a population of recombinant inbred lines (RILs) developed from a cross between two parents, "Tutoumai A" and "Siyang 936", contrasting in 4AL QTL. Several closely linked GBS SNP markers to the 4AL QTL were identified and some of them were coverted to KASP for marker-assisted breeding. To investigate effects of the two non-GC related QTLs on 3AS and 4AL, both QTLs were transferered from "Tutoumai A" and "AUS1408" into a susceptible US hard winter wheat breeding line, NW97S186, through marker-assisted backcrossing using the gene marker TaPHS1 for 3AS QTL and a tightly linked KASP marker we developed for 4AL QTL. The 3AS QTL (TaPHS1) significantly interacted with environments and genetic backgrounds, whereas 4AL QTL (TaMKK3-A) interacted with environments only. The two QTLs showed additive effects on PHS resistance, indicating pyramiding these two QTLs can increase PHS resistance. To improve breeding selection efficiency, genomic prediction using genome-wide markers and marker-based prediction (MBP) using selected trait-linked markers were conducted in the association panel. Among the four genomic prediction methods evaluated, the ridge regression best linear unbiased prediction (rrBLUP) provides the best prediction among the tested methods (rrBLUP, BayesB, BayesC and BayesC0). However, MBP using 11 significant SNPs identified in the association study provides a better prediction than genomic prediction. Therefore, for traits that are controlled by a few major QTLs, MBP may be more effective than genomic selection.
Download or read book Australian Journal of Agricultural Research written by and published by . This book was released on 2001 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic and Hormonal Mechanisms Controlling Grain Dormancy and Preharvest Sprouting Tolerance in White Wheat written by Shantel Amealia Martinez and published by . This book was released on 2018 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preharvest sprouting (PHS), germination of mature grain while still on the mother plant, occurs when conditions become cool and wet before harvest. The hydrolytic enzyme ?-amylase, induced during germination, mobilizes starch into simple carbohydrates to fuel seedling growth. Because this enzyme activity in flour causes poor end-use quality, sprouted grain sells at a severe discount. The falling number (FN) test measures ?-amylase activity in wheat meal or flour in the wheat industry. Seed dormancy, the inability to germinate even under favorable conditions, contributes about 60--80 % of genetic PHS tolerance. Red wheat varieties have higher seed dormancy and PHS tolerance than white. To improve white wheat, a genome-wide association study (GWAS) examined the genetic architecture of PHS tolerance in 469 soft white winter wheat accessions. Based on FN after natural or artificial rain, the GWAS identified 9 QTL (QFN.wsu), of which 4 co-localized with known PHS QTL and 3 with known FN/quality QTL. Based on visible sprout in spike-wetting tests, the GWAS identified 34 QTL (QPHS.wsu), of which 19 co-localized with known PHS loci and genes such as MOTHER OF FLOWERING TIME (TaMFT) and mitogen-activated protein kinase kinase 3 (TaMKK3-A). PHS tolerance in white wheat can result from higher sensitivity to the seed dormancy-inducing hormone abscisic acid (ABA). Enhanced Response to ABA (ERA8 ) is a semi-dominant ABA hypersensitive mutant, resulting in increased seed dormancy and PHS tolerance in the soft white spring wheat 'Zak'. The ERA8 locus was mapped to a large region of chromosome 4A relative to mutagen-induced SNPs in a Zak/ZakERA8 backcross population using bulk segregant analysis (BSA) of exome sequence from BC 3F2:3 wild-type and mutant DNA. Fine mapping using mutagen-induced SNPs in additional backcross lines localized ERA8 to a 4.5 Mb region containing 70 predicted genes. The only mutagen-induced coding region mutation strongly linked to ERA8 (LOD 16.51) resulted in a missense mutation in MKK3-A, a gene involved in Arabidopsis ABA signaling. Natural variation in wheat and barley MKK3 was previously shown to control seed dormancy and PHS tolerance.
Download or read book Enhancing Efficiency in Wheat Triticum Aestivum L Breeding for Abiotic and Biotic Stress Resistance Using Novel Physiological and Genetic Approaches written by Megan Johanna Lewien and published by . This book was released on 2017 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: By 2050 global demand for wheat (Triticum aestivum L.) is predicted to grow by 60%. To meet this demand, annual genetic gains must increase by 1.4%, and withstand increasing environmental stresses. The goal of the work herein was to use new phenomic, genomic and molecular tools to identify novel genomic regions associated with eyespot (Oculimacula yallundae and O. acuformis) disease resistance, drought tolerance and yield stability. To identify novel genomic regions associated with eyespot resistance in winter wheat, disease susceptibility was evaluated in two PNW winter wheat panels (n= 469, 399) and genome-wide association mapping was conducted. Of the 92 marker trait associations identified, the seven most significant cumulatively reduced eyespot disease response. As breeding lines were used, the results can be used for rapid introgression of resistance alleles into elite lines. The second objective of this work was to evaluate phenotypic associations of physiological traits and yield under rain-fed conditions to identify traits for use in breeding. 700 lines of the spring wheat nested association mapping panel were evaluated for water use efficiency, plant water status, photosynthetic and photoprotective mechanisms and grain yield over three years. Six traits had a cumulative effect on increasing yield: plant water status, plant height, photosynthetic capacity, vegetative green index, water used efficiency and days from sowing to heading. The physiological traits identified can be used to improve selection efficiency and yield stability under variable rain-fed conditions. The third objective of this work was to identify genomic regions associated with the water-use efficiency, plant water status, leaf health and photosynthesis. 650 lines of the spring wheat NAM panel were evaluated for these traits and grain yield under rain-fed conditions and joint inclusive composite interval mapping and genome-wide association analysis was conducted. The seven most significant grain yield QTL identified, located on chromosomes 1A, 1B, 2B, 4B, 5B, and 7B, were found in multiple environments and were associated with multiple physiological traits. This study helps reveal the genetic architecture of drought tolerance and grain yield and can be used to improve the efficiency of breeding under variable water-limited conditions.
Download or read book Biology of Rice written by S. Tsunoda and published by Elsevier. This book was released on 2012-12-02 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a wealth of both general and specific information about rice. The first section outlines the distribution and mutual relationships of various types of rice with special attention to the adaptive strategy of wild and cultivated rice, and to the relationships between different ecotypes and their adaptation to low temperature, different photoperiods or different humidities. The section on rice morpho-physiology compares the characteristics of rice and dry land crops and different ecotypes with regard to seed dormancy and germination; describes the important steps in the photosynthetic structure process and its adjustment to the course of evolution of cultivated rice; studies the root and nutrient uptake and the responses to hormones in terrestrial and aquatic plants; considers the reproductive nature in relation to tolerance to environmental stress; and discusses the morphological characteristics of rice panicle in relation to grain filling, sink-source balance and variation in yield components of panicle structure. The last section reviews the genetics of rice and includes new findings on chromosomal analysis, cytoplasmic analysis and gene analysis and reviews recent achievements in tissue culture and genetic engineering techniques.The book is authoritative, well-documented and international in scope. It presents new and useful information of direct use to rice research workers and students, and of interest to crop physiologists, agronomists, plant physiologists and breeders throughout the world.
Download or read book Root Ecology written by Hans de Kroon and published by Springer Science & Business Media. This book was released on 2003-05-21 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the course of evolution, a great variety of root systems have learned to overcome the many physical, biochemical and biological problems brought about by soil. This development has made them a fascinating object of scientific study. This volume gives an overview of how roots have adapted to the soil environment and which roles they play in the soil ecosystem. The text describes the form and function of roots, their temporal and spatial distribution, and their turnover rate in various ecosystems. Subsequently, a physiological background is provided for basic functions, such as carbon acquisition, water and solute movement, and for their responses to three major abiotic stresses, i.e. hard soil structure, drought and flooding. The volume concludes with the interactions of roots with other organisms of the complex soil ecosystem, including symbiosis, competition, and the function of roots as a food source.
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.
Download or read book Plant Breeding Reviews Volume 45 written by Irwin Goldman and published by John Wiley & Sons. This book was released on 2021-10-21 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant Breeding Reviews presents state-of-the-art reviews on plant genetics and the breeding of all types of crops by both traditional means and molecular methods. Many of the crops widely grown today stem from a very narrow genetic base; understanding and preserving crop genetic resources is vital to the security of food systems worldwide. The emphasis of the series is on methodology, a fundamental understanding of crop genetics, and applications to major crops.
Download or read book Plant Breeding Reviews written by and published by John Wiley & Sons. This book was released on 2020-11-05 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weedy Rices written by James C. Delouche and published by Food & Agriculture Org.. This book was released on 2007 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing on literature reviews from ongoing unpublished research, research reports and symposia carried out on various aspects of the importance, ecology, biology and control of weedy rices, this publication also highlights global economic and environmental problems created by weedy rices, including red rice types.
Download or read book Wheat Production in Stressed Environments written by H.T. Buck and published by Springer Science & Business Media. This book was released on 2007-05-16 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a unique overview to wheat and related species, this book comprises the proceedings of the 7th International Wheat Conference, held in Mar del Plata, Argentina, at the end of 2005. Leading scientists from all over the world, specialized in different areas that contribute to the better understanding of wheat production and use, review the present achievements and discuss the future challenges for the wheat crop.
Download or read book The Encyclopedia of Seeds written by J. Derek Bewley and published by CABI. This book was released on 2006 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first scholarly reference work to cover all the major scientific themes and facets of the subject of seeds. It outlines the latest fundamental biological knowledge about seeds, together with the principles of agricultural seed processing, storage and sowing, the food and industrial uses of seeds, and the roles of seeds in history, economies and cultures. With contributions from 110 expert authors worldwide, the editors have created 560 authoritative articles, illustrated with plentiful tables, figures, black-and-white and color photographs, suggested further reading matter and 670 supplementary definitions. The contents are alphabetically arranged and cross-referenced to connect related entries.
Download or read book Handbook of Brewing written by Hans Michael Eßlinger and published by John Wiley & Sons. This book was released on 2009-04-22 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive reference combines the technological know-how from five centuries of industrial-scale brewing to meet the needs of a global economy. The editor and authors draw on the expertise gained in the world's most competitive beer market (Germany), where many of the current technologies were first introduced. Following a look at the history of beer brewing, the book goes on to discuss raw materials, fermentation, maturation and storage, filtration and stabilization, special production methods and beermix beverages. Further chapters investigate the properties and quality of beer, flavor stability, analysis and quality control, microbiology and certification, as well as physiology and toxicology. Such modern aspects as automation, energy and environmental protection are also considered. Regional processes and specialties are addressed throughout the entire book, making this a truly global resource on brewing.
Download or read book Wheat Landraces written by Nusret Zencirci and published by Springer Nature. This book was released on 2021-09-15 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landraces possess a very large genetic base in population structure and are dynamic populations of cultivated plants with historical origin, distinct identity, and without any formal crop improvement. They are often genetically diverse, locally adapted, and associated with traditional farming systems. Resistance genes to biotic and abiotic stress factors, which are especially diversified in landraces, are of great interest to plant breeders, faced with global climate challenge. In addition, gene pools made of different landraces grown in different ecological conditions can be used for wheat breeding to enhance quality; yield and other desirable agricultural parameters. An estimated 75% of the genetic diversity of crop plants was lost in the last century due to the replacement of high yielding modern varieties. There is, thus, an urgent need to preserve existing species, not only for posterity but also as a means to secure food supply for a rising world population. In this book, we provide an overview of wheat landraces with special attention to genetic diversities, conservation, and utilization.
Download or read book Cereals and Millets written by Chittaranjan Kole and published by Springer Science & Business Media. This book was released on 2006-10-28 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of the seven-volume series Genome Mapping and Molecular Breeding in Plants, this book covers Cereals and Millets, which provide staple food for most of the earth’s population. This book includes chapters on rice, wheat, maize, barley, oats, rye, sorghum, pearl millet, foxtail millet and finger millet. The emphasis is on advanced research on the major crops, including the model plants maize and rice, as well as on future road maps of genomic research for the less-often considered but equally deserving cereals and millets.
