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Improving Precision And Modeling Genotype X Environment Interactions Of Forage Yield Trials
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Book Synopsis Improving Precision and Modeling Genotype X Environment Interactions of Forage Yield Trials by : Raghuveer Sripathi
Download or read book Improving Precision and Modeling Genotype X Environment Interactions of Forage Yield Trials written by Raghuveer Sripathi and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field-based yield trials are subject to several external factors that influence precision, power, and selection decisions of genotype evaluations. Long-term yield trials conducted by the Department of Agriculture, Food and Marine (DAFM) in Ireland were used as a case study to address three main research objectives: (i) quantify the effects of block size, block shape, and number of replicates on precision of yield estimation, (ii) quantify the effect of spatial variability on precision and power of forage yield estimation, and (iii) modeling genotype x environment correlation structures to predict genotypic performance across different environments and evaluate cost-reduction scenarios for resource allocation. All trials were designed with randomized complete block designs (RCBDs) across five locations and trials were harvested for a maximum of two consecutive years. The impact of block size and number of replicates on trial precision was dependent on block shape. Increasing number of replicates significantly decreased LSD only in wider (more square) blocks compared to narrow (more rectangular) blocks. Uniformity trial results indicated that row-column designs were 36% more efficient than complete block designs. Among different spatial models, the best spatial models were correlated errors (CE) models that modeled the specific correlation structure present in each trial and these models were 71% more efficient than RCBDs without spatial analysis. Comparison of the best CE models and the RCBDs without spatial analysis showed considerable differences in power and selection of genotypes for the DAFM trials. Modeling genotype x environment correlations using unstructured variance-covariance models were effective not only to classify the testing locations but also to improve the prediction of genotypic performance across locations. Cost reduction via reducing the number of harvest years was not effective for the DAFM trials. Results of this research demonstrate the wealth of information embedded within long-term yield trials to assess different experimental design-based and model-based approaches to improve the precision of genotypic evaluations and also to interpret the important and complex genotype x environment interactions. These analyses can be employed in any long-term research program with historical data accumulated over several years.
Book Synopsis Modelling of Genotype by Environment Interaction and Prediction of Complex Traits Across Multiple Environments as a Synthesis of Crop Growth Modelling, Genetics and Statistics by :
Download or read book Modelling of Genotype by Environment Interaction and Prediction of Complex Traits Across Multiple Environments as a Synthesis of Crop Growth Modelling, Genetics and Statistics written by and published by . This book was released on 2017 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Statistical Analysis of Regional Yield Trials: AMMI Analysis of Factorial Designs by : Hugh G. Gauch (Jr.)
Download or read book Statistical Analysis of Regional Yield Trials: AMMI Analysis of Factorial Designs written by Hugh G. Gauch (Jr.) and published by . This book was released on 1992-11-06 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic statistical concepts. AMMI and related models. Estimation. Selection. Modeling. Efficient experiments.
Book Synopsis Genomic Selection: Lessons Learned and Perspectives by : Johannes W. R. Martini
Download or read book Genomic Selection: Lessons Learned and Perspectives written by Johannes W. R. Martini and published by Frontiers Media SA. This book was released on 2022-09-15 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genomic selection (GS) has been the most prominent topic in breeding science in the last two decades. The continued interest is promoted by its huge potential impact on the efficiency of breeding. Predicting a breeding value based on molecular markers and phenotypic values of relatives may be used to manipulate three parameters of the breeder's equation. First, the accuracy of the selection may be improved by predicting the genetic value more reliably when considering the records of relatives and the realized genomic relationship. Secondly, genotyping and predicting may be more cost effective than comprehensive phenotyping. Resources can instead be allocated to increasing population sizes and selection intensity. The third, probably most important factor, is time. As shown in dairy cattle breeding, reducing cycle time by crossing selection candidates earlier may have the strongest impact on selection gain. Many different prediction models have been used, and different ways of using predicted values in a breeding program have been explored. We would like to address the questions: i. How did GS change breeding schemes of different crops in the last 20 years? ii. What was the impact on realized selection gain? iii. What would be the best structure of a crop-specific breeding scheme to exploit the full potential of GS? iv. What is the potential of hybrid prediction, epistasis effect models, deep learning methods and other extensions of the standard prediction of additive effects? v. What are the long-term effects of GS? vi. Can predictive breeding approaches also be used to harness genetic resources from germplasm banks in a more efficient way to adapt current germplasm to new environmental challenges? This Research Topic welcomes submissions of Original Research papers, Opinions, Perspectives, Reviews, and Mini-Reviews related to these themes: 1. Genomic selection: statistical methodology 2. The (optimal) use of GS in breeding schemes 3. Practical experiences with GS (selection gain, long-term effects, negative side effects) 4. Predictive approaches to harness genetic resources Concerning point 1): If an original research paper compares different methods empirically without theoretical considerations on when one or the other method should be better, the methods should be compared with at least five different data sets. The data sets should differ either in crop, genotyping method or its source, for instance from a breeding program or gene bank accessions. Concerning point 2): Manuscripts addressing the use of GS in breeding schemes should illustrate breeding schemes that are run in practice. General ideas about schemes that may be run in the future may be considered as 'Perspective' articles. Conflict of Interest statements: - Topic Editor Valentin Wimmer is affiliated to KWS SAAT SE & Co. KGaA, Germany. - Topic Editor Brian Gardunia is affiliated to Bayer Crop Sciences and has a collaboration with AbacusBio, and is an author on patents with Bayer Crop Sciences. The other Topic Editors did not disclose any conflicts of interest. Image credit: CIMMYT, reproduced under the CC BY-NC-SA 2.0 license
Book Synopsis Evaluation of preharvest and postharvest factors on forage crop quality, physiology, and ensiling characteristics by : Siran Wang
Download or read book Evaluation of preharvest and postharvest factors on forage crop quality, physiology, and ensiling characteristics written by Siran Wang and published by Frontiers Media SA. This book was released on 2024-05-27 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Alfalfa Genome written by Long-Xi Yu and published by Springer Nature. This book was released on 2021-07-17 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first comprehensive compilation of deliberations on whole genome sequencing of the diploid and tetraploid alfalfa genomes including sequence assembly, gene annotation, and comparative genomics with the model legume genome, functional genomics, and genomics of important agronomic characters. Other chapters describe the genetic diversity and germplasm collections of alfalfa, as well as development of genetic markers and genome-wide association and genomic selection for economical important traits, genome editing, genomics, and breeding targets to address current and future needs. Altogether, the book contains about 300 pages over 16 chapters authored by globally reputed experts on the relevant field in this crop. This book is useful to the students, teachers, and scientists in the academia and relevant private companies interested in genetics, breeding, pathology, physiology, molecular genetics and breeding, biotechnology, and structural and functional genomics. The work is also useful to seed and forage industries.
Book Synopsis Wild Plants as Source of New Crops by : Petr Smýkal
Download or read book Wild Plants as Source of New Crops written by Petr Smýkal and published by Frontiers Media SA. This book was released on 2020-12-02 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Book Synopsis Genotype by Environment Interaction by : Manjit S. Kang
Download or read book Genotype by Environment Interaction written by Manjit S. Kang and published by CRC-Press. This book was released on 1996-02-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genotype-by-Environment Interaction (GEI) is a prevalent issue among crop farmers, plant breeders, geneticists, and production agronomists. This book brings together contributions from expert plant breeders and quantitative geneticists to better understand the relationship between crop performance and environment. This information can reduce the cost of extensive genotype evaluation by eliminating unnecessary testing sites and by fine-tuning breeding programs. Molecular aspects of GEI are discussed for the first time and key bibliographical references on GEI are included in an appendix.
Book Synopsis DNA-Based Markers in Plants by : R.L. Phillips
Download or read book DNA-Based Markers in Plants written by R.L. Phillips and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the new techniques described in this volume, a new gene can be placed on the linkage map within only a few days. Leading researchers have updated the earlier edition to include the latest versions of DNA-based marker maps for a variety of important crops.
Book Synopsis Advances in cassava genomics, genetics and breeding by : Xiaofei Zhang
Download or read book Advances in cassava genomics, genetics and breeding written by Xiaofei Zhang and published by Frontiers Media SA. This book was released on 2023-06-08 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Legume Genetics and Biology by : Petr Smýkal
Download or read book Legume Genetics and Biology written by Petr Smýkal and published by MDPI. This book was released on 2020-12-29 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Legumes have played an important part as human food and animal feed in cropping systems since the dawn of agriculture. The legume family is arguably one of the most abundantly domesticated crop plant families. Their ability to symbiotically fix nitrogen and improve soil fertility has been rewarded since antiquity and makes them a key protein source. Pea was the original model organism used in Mendel´s discovery of the laws of inheritance, making it the foundation of modern plant genetics. This book based on Special Issue provides up-to-date information on legume biology, genetic advances, and the legacy of Mendel.
Book Synopsis Computers and Information Technologies in Agricultural Production and Management by :
Download or read book Computers and Information Technologies in Agricultural Production and Management written by and published by . This book was released on 1997 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetics and Genomics of Polyploid Plants by : Jun Yang
Download or read book Genetics and Genomics of Polyploid Plants written by Jun Yang and published by Frontiers Media SA. This book was released on 2019-10-15 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computers and Information Technologies in Agricultural Production and Management by : Karl Schneider
Download or read book Computers and Information Technologies in Agricultural Production and Management written by Karl Schneider and published by DIANE Publishing. This book was released on 1997 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bibliography contains 550 journal, book, and audiovisual citations from the National Agricultural Library's AGRICOLA database. Each entry includes title, publisher, NAL call number, place and date of publication, volume and issue number, pages, description (audiovisual), and descriptors. Many entries include abstracts. Indexed by subject and author.
Book Synopsis Identification of Genes Involved in Environmental Adaption and Yield Traits in Forage and Other Ecologically Important Plants by : Qiang Guo
Download or read book Identification of Genes Involved in Environmental Adaption and Yield Traits in Forage and Other Ecologically Important Plants written by Qiang Guo and published by Frontiers Media SA. This book was released on 2023-11-07 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genotype X Environment Interactions by : Paolo Annicchiarico
Download or read book Genotype X Environment Interactions written by Paolo Annicchiarico and published by Food & Agriculture Org.. This book was released on 2002 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The projected increase in world population levels and the subsequent rise in food demand represents a huge challenge for agricultural production systems worldwide. This publication examines the opportunities and challenges raised by the use of plant genetic resources and highlights the contribution that data from multi-environment yield trials can provide for the definition of adaptation strategies and yield stability targets in plant breeding programmes. It contains a case study about a durum wheat crop programme in Algeria, and also includes a CD-ROM with data from IRRISTAT, a programme developed by the International Rice Research Institute (IRRI).
