Author: Kefei Chen Publisher: Frontiers Media SA ISBN: 2832540619 Category : Science Languages : en Pages : 147
Book Description
The advances in “omics” technologies have enabled unprecedented progress in agricultural and biological sciences. The synergy of high-performance computing, high throughput omics approaches, and high dimensional phenotyping data with high spatial and temporal resolution have demonstrated the capacity to enhance our understanding of biological mechanisms but also to provide powerful insights into dissecting the genetic basis of complex traits with agricultural and economical importance. Genome-wide association study (GWAS) has become a useful approach to identify mutations that underlie diseases and complex traits and has provided important insights in exploring genetic profiles. However, it is less suitable for quantitative traits influenced by a large number of genes with small effects. In addition, false discoveries are a major concern and can be partially attributed to population structure. Genomic selection holds the promise to overcome the limitations by using whole-genome information to predict the genetic merits of phenotypes. It has been a powerful tool for predicting the breeding values of candidates for selection in breeding populations. One of the challenges of genomic prediction of breeding values with large-p-with-small-n regressions is to develop robust and efficient approaches that accurately predict phenotypic traits as functions of genotypic and environmental inputs. In addition, the integration of multi-omics data in phenotypic prediction would offer the opportunity to understand the flow of information that underlies the phenotypic traits.
Author: Rajeev K. Varshney Publisher: Springer ISBN: 3319631705 Category : Technology & Engineering Languages : en Pages : 265
Book Description
Genomic Selection for Crop Improvement serves as handbook for users by providing basic as well as advanced understandings of genomic selection. This useful review explains germplasm use, phenotyping evaluation, marker genotyping methods, and statistical models involved in genomic selection. It also includes examples of ongoing activities of genomic selection for crop improvement and efforts initiated to deploy the genomic selection in some important crops. In order to understand the potential of GS breeding, it is high time to bring complete information in the form of a book that can serve as a ready reference for geneticist and plant breeders.
Author: Cedric Gondro Publisher: ISBN: 9781627034470 Category : Bioinformatics Languages : en Pages : 566
Book Description
"With the detailed genomic information that is now becoming available, we have a plethora of data that allows researchers to address questions in a variety of areas. Genome-wide association studies (GWAS) have become a vital approach to identify candidate regions associated with complex diseases in human medicine, production traits in agriculture, and variation in wild populations. Genomic prediction goes a step further, attempting to predict phenotypic variation in these traits from genomic information. Genome-Wide Association Studies and Genomic Prediction pulls together expert contributions to address this important area of study. The volume begins with a section covering the phenotypes of interest as well as design issues for GWAS, then moves on to discuss efficient computational methods to store and handle large datasets, quality control measures, phasing, haplotype inference, and imputation. Later chapters deal with statistical approaches to data analysis where the experimental objective is either to confirm the biology by identifying genomic regions associated to a trait or to use the data to make genomic predictions about a future phenotypic outcome (e.g. predict onset of disease). As part of the Methods in Molecular Biology series, chapters provide helpful, real-world implementation advice."--
Author: Jennifer Elizabeth Spindel Publisher: ISBN: Category : Languages : en Pages : 314
Book Description
To address the multiple challenges to food security posed by global climate change, population growth and rising incomes, plant breeders are developing new crop varieties that can enhance both agricultural productivity and environmental sustainability. Current breeding practices, however, are unable to keep pace with demand. Genomic Selection (GS) is a new breeding method in which genome-wide markers are used to predict the breeding value of individuals in a breeding population. GS has been shown to improve breeding efficiency in dairy cattle and several crop plant species, and here I evaluate for the first time its efficacy for breeding inbred lines of rice. I performed a genome-wide association study (GWAS) in conjunction with five-fold GS cross-validation on a population of 363 elite breeding lines from the International Rice Research Institute's (IRRI) irrigated rice breeding program and herein report the GS results. The population was genotyped using a genotyping-by-sequencing protocol optimized for rice in the first part of this thesis. The training population, statistical method used to build the GS model, number of markers, and trait were varied to determine their effect on prediction accuracy. For all three traits, genomic prediction models outperformed prediction based on pedigree records alone. Furthermore, the most accurate GS models were those that incorporated fixed variables derived from genome-wide-association studies (GWAS) performed on rice model training data and by incorporating data from multiple environments. Two breeding schemas are then presented, including an extended, two-stream breeding design that can be used to efficiently integrate novel variation into elite breeding populations, expanding genetic diversity and enhancing the potential for sustainable productivity gains.
Author: Philipp Bayer Publisher: CABI ISBN: 1789247829 Category : Science Languages : en Pages : 218
Book Description
Genome sequencing has become a basic tool of plant and animal breeding. Reduced costs have allowed the sequencing of thousands of plant lines or cultivars, leading to previously unobtainable insights into genetic impacts during breeding and generating large numbers of novel candidate breeding genes. This book summarizes the impacts that the genome sequencing revolution has had on agriculture with reference to applications across species and locations. It explains new techniques and their use in understanding epigenetics, breeding and conservation. It is a useful resource for scientists wanting to learn how different fields of agriculture have adapted novel genome sequencing technologies to their requirements, and for those wanting to transfer technologies and lessons learned from one field of agriculture to another. This book is a useful resource for students and researchers in biotechnology, genetics, genomics and breeding.
Author: John E. Bradshaw Publisher: Springer ISBN: 3319232851 Category : Science Languages : en Pages : 710
Book Description
This book aims to help plant breeders by reviewing past achievements, currently successful practices, and emerging methods and techniques. Theoretical considerations are also presented to strike the right balance between being as simple as possible but as complex as necessary. The United Nations predicts that the global human population will continue rising to 9.0 billion by 2050. World food production will need to increase between 70-100 per cent in just 40 years. First generation bio-fuels are also using crops and cropland to produce energy rather than food. In addition, land area used for agriculture may remain static or even decrease as a result of degradation and climate change, despite more land being theoretically available, unless crops can be bred which tolerate associated abiotic stresses. Lastly, it is unlikely that steps can be taken to mitigate all of the climate change predicted to occur by 2050, and beyond, and hence adaptation of farming systems and crop production will be required to reduce predicted negative effects on yields that will occur without crop adaptation. Substantial progress will therefore be required in bridging the yield gap between what is currently achieved per unit of land and what should be possible in future, with the best farming methods and best storage and transportation of food, given the availability of suitably adapted cultivars, including adaptation to climate change. My book is divided into four parts: Part I is an historical introduction; Part II deals with the origin of genetic variation by mutation and recombination of DNA; Part III explains how the mating system of a crop species determines the genetic structure of its landraces; Part IV considers the three complementary options for future progress: use of sexual reproduction in further conventional breeding, base broadening and introgression; mutation breeding; and genetically modified crops.
Author: Nnadozie C. Oraguzie Publisher: Springer Science & Business Media ISBN: 0387360115 Category : Science Languages : en Pages : 290
Book Description
This book provides both basic and advanced understanding of association mapping and an awareness of population genomics tools to facilitate mapping and identification of the underlying causes of quantitative trait variation in plants. It acts as a useful review of the marker technology, the statistical methodology, and the progress to date. It also offers guides to the use of single nucleotide polymorphisms (SNPs) in association studies.
Author: Kefei Chen
Author: Rajeev K. Varshney
Author: Nunzio D’Agostino
Author: Cedric Gondro
Author: Sundeep Kumar
Author: Jennifer Elizabeth Spindel
Author: Philipp Bayer
Author: 
Author: John E. Bradshaw
Author: Nnadozie C. Oraguzie