Download or read book Effects of Genotype by Environment Interactions on Beef Cattle Performance at Two Locations written by Kepler Euclides Filho and published by . This book was released on 1984 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 2592 calves produced in Nebraska and Florida were used to evaluate the importance of genotype by location interactions on reproductive and maternal performance of eight breeds groups of dam. Breed groups of dam included Angus-Hereford reciprocal crossbreds, Pinzgauer-Angus, Pinzgauer-Hereford, Brahman-Angus, Brahman-Hereford. Birth and weaning weights and preweaning average daily gain were highly influenced by the genotype-location interaction. The significant breed group of dam by location interaction observed for birth weight was the result of a reversal in rank of Brahman-Hereford and Brahman-Angus cows at the two locations. Calves from Brahman-Hereford dams in Florida were heavier at birth than those from Brahman-Angus, whereas in Nebraska, thereverse was true. The taurus-taurus F1 cows (Angus-Hereford reciprocal crosses and Pinzgauer crosses) weaned heavier calves at the Nebraska location than they did at the Florida location, whereas the weight of calves weaned by the zebu-taurus F1 cows (Brahman-taurus and Sahiwal-taurus crosses) was not influenced by location. There was a change in the rank of Pinzgauer-taurus and Sahiwal-taurus at the two locations for preweaning calf average daily gain. Calves by Pinzgauer-taurus dams gained more weight from birth to weaning than did those from the Sahiwal-taurus dams the comparison was made at the Nebraska location. Calves by the Sahiwal-taurus dams were superior at the Florida location. Interactions of age of dam and breed group of dam were important...
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 Adaptation and Fitness in Animal Populations written by Julius van der Werf and published by Springer Science & Business Media. This book was released on 2008-10-17 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fitness and adaptation are fundamental characteristics of plant and animal species, enabling them to survive in their environment and to adapt to the inevitable changes in this environment. This is true for both the genetic resources of natural ecosystems as well as those used in agricultural production. Extensive genetic variation exists between varieties/breeds in a species and amongst individuals within breeds. This variation has developed over very long periods of time. A major ongoing challenge is how to best utilize this variation to meet short-term demands whilst also conserving it for longer-term possible use. Many animal breeding programs have led to increased performance for production traits but this has often been accompanied by reduced fitness. In addition, the global use of genetic resources prompts the question whether introduced genotypes are adapted to local production systems. Understanding the genetic nature of fitness and adaptation will enable us to better manage genetic resources allowing us to make efficient and sustainable decisions for the improvement or breeding of these resources. This book had an ambitious goal in bringing together a sample of the world’s leading scientists in animal breeding and evolutionary genetics to exchange knowledge to advance our understanding of these vital issues.
Download or read book Modeling the Effects of Fatness on Genotype environment Interactions in Establishing Maintenance Requirements of Beef Cattle written by Emilio Chavez Cano and published by . This book was released on 1990 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genotype by Environment Interactions for Preweaning Traits of Beef Cattle written by Brandon R. Pilcik and published by . This book was released on 1998 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Cassava in Tropical Africa written by International Institute of Tropical Agriculture and published by IITA. This book was released on 1990 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intended as both an instructional and a reference tool, the volume covers the production and postharvest treatment of cassava. The first part describes production constraints including pests , diseases, weeds, soils agronomic factors, and socioeconomic considerations. In part two, plant morphology, plant physiology and plant breeding are related to yields and diseases resistance. Part three covers postharvest treatment and part four describes cassava research. A bibliography of recommended reading is included.
Download or read book Improving the Sensory and Nutritional Quality of Fresh Meat written by Joseph Kerry and published by Elsevier. This book was released on 2009-01-22 with total page 687 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding of the scientific basis of quality attributes in meat is becoming more advanced, providing more effective approaches to the control of meat eating and technological quality. This important collection reviews essential knowledge of the mechanisms underlying quality characteristics and methods to improve meat sensory and nutritional quality. Part one analyses the scientific basis of meat quality attributes, such as texture and tenderness, colour, water-holding capacity and flavour development. Chapters on the nutritional quality of meat and meat sensory evaluation complete the section. Part two discusses significant insights into the biology of meat quality obtained from genomic and proteomic perspectives, with chapters focussing on different types of meat. Parts three and four then review production and processing strategies to optimise meat quality, considering aspects such as production practices and meat nutritional quality, dietary antioxidants and antimicrobials, carcass interventions, chilling and freezing and packaging. Methods of meat grading and quality analysis are also included. With its distinguished editors and international team of contributors, Improving the sensory and nutritional quality of fresh meat is a standard reference for those industrialists and academics interested in optimising meat quality. Reviews methods to improve meat sensory and nutritional quality considering the effects of different production practices such as chilling, freezing and packaging Analyses the scientific basis of meat quality attributes covering texture, tenderness, colour and water-holding capacity Examines production and processing strategies to optimise meat quality, including the current state of development and future potential
Download or read book Genetic Data Analysis for Plant and Animal Breeding written by Fikret Isik and published by Springer. This book was released on 2017-09-09 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book fills the gap between textbooks of quantitative genetic theory, and software manuals that provide details on analytical methods but little context or perspective on which methods may be most appropriate for a particular application. Accordingly this book is composed of two sections. The first section (Chapters 1 to 8) covers topics of classical phenotypic data analysis for prediction of breeding values in animal and plant breeding programs. In the second section (Chapters 9 to 13) we provide the concept and overall review of available tools for using DNA markers for predictions of genetic merits in breeding populations. With advances in DNA sequencing technologies, genomic data, especially single nucleotide polymorphism (SNP) markers, have become available for animal and plant breeding programs in recent years. Analysis of DNA markers for prediction of genetic merit is a relatively new and active research area. The algorithms and software to implement these algorithms are changing rapidly. This section represents state-of-the-art knowledge on the tools and technologies available for genetic analysis of plants and animals. However, readers should be aware that the methods or statistical packages covered here may not be available or they might be out of date in a few years. Ultimately the book is intended for professional breeders interested in utilizing these tools and approaches in their breeding programs. Lastly, we anticipate the usage of this volume for advanced level graduate courses in agricultural and breeding courses.
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.
Download or read book The Effects of Genotype X Location Interaction on Various Production Traits in Two Selections of Hereford Cattle written by Jose Antonio Ribas Ribeiro and published by . This book was released on 1976 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies Involving Genotype by Environment Interactions for Preweaning Beef Cattle Traits in the Southern Region written by Sarah L. Northcutt and published by . This book was released on 1987 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Genotype environment Interactions in Beef Cattle Production Systems Using a Computer Simulation Model written by Jerome Frank Baker and published by . This book was released on 1982 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluation of genotype environment interactions in beef cattle production systems using a computer simulation model.
Download or read book Lost Crops of Africa written by National Research Council and published by National Academies Press. This book was released on 2006-10-27 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the second in a series of three evaluating underexploited African plant resources that could help broaden and secure Africa's food supply. The volume describes the characteristics of 18 little-known indigenous African vegetables (including tubers and legumes) that have potential as food- and cash-crops but are typically overlooked by scientists and policymakers and in the world at large. The book assesses the potential of each vegetable to help overcome malnutrition, boost food security, foster rural development, and create sustainable landcare in Africa. Each species is described in a separate chapter, based on information gathered from and verified by a pool of experts throughout the world. Volume I describes African grains and Volume III African fruits.
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).
Download or read book Environmental Effects and Genotype environment Interactions in Laying Stocks of Chickens written by Robert James Mackin and published by . This book was released on 1970 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tackling Climate Change Through Livestock written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2013 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Greenhouse gas emissions by the livestock sector could be cut by as much as 30 percent through the wider use of existing best practices and technologies. FAO conducted a detailed analysis of GHG emissions at multiple stages of various livestock supply chains, including the production and transport of animal feed, on-farm energy use, emissions from animal digestion and manure decay, as well as the post-slaughter transport, refrigeration and packaging of animal products. This report represents the most comprehensive estimate made to-date of livestocks contribution to global warming as well as the sectors potential to help tackle the problem. This publication is aimed at professionals in food and agriculture as well as policy makers.
