Download or read book Genotype by Environment Interaction for Milk Production Traits in Holstein Friesian Dairy Cattle in Ireland written by Andrew Robert Cromie and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation Into Genotype by Environment Interactions for Milk Production Traits in Holstein Friesian Dairy Cattle in Ireland written by Paul Murtagh and published by . This book was released on 2001 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genotype by Environment Interaction in Milk Production and Reproductive Traits Among Holstein Cows Producing in Mexico and the US Environments written by Eugenia Cienfuegos and published by . This book was released on 1998 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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readers should be aware that the methods or statistical packages covered here may not be available or they might be out of date in a few years.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 Genotype by Environment Interaction in Milk Production and Reproductive Traits Among Holstein Cows Producing in Mexico and United States Environments written by Eugenia Cienfuegos and published by . This book was released on 1998 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: To quantify genotype by environment interaction for mature equivalent milk production in northeastern US and Mexico, mature equivalent records of 55,162 Holstein cows from 1,339 sires of first three lactations in Mexico and first lactation records of 499,401 Holstein cows from 663 sires in the U.S. were analyzed. There were 474 sires in common. Herd-year standard deviation classifications were used to define high ($\geq$1,600 kg) and low ($\leq$1,300 kg) Mexican data files and a low ($\leq$1025 kg) U.S. data file. These data files were used to determine whether information from US herds with low environmental opportunity better predicts yield response in the alternative Mexican environments. Genetic and phenotypic parameters were estimated with multiple trait derivative-free REML methods. Genetic correlation coefficients between pairs of traits in different environments were tested for difference from unity using the likelihood ratio test. Heritability estimates across Mexican environments were about 0.18, and across US environments about 0.21. Using all the US data genetic correlation coefficients were less than unity (P $
Download or read book Investigation of Genotype by Environment Interaction for Holstein Milk Yield in Colombia Mexico and Puerto Rico written by Tatiana Luisa Stanton and published by . This book was released on 1990 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feeding Concentrates written by Roy Kellaway and published by Landlinks Press. This book was released on 2004-02-19 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents strategies for feeding energy and protein supplements to pasture-fed dairy cows and examines the potential economic benefits. Effective supplementary feeding of concentrates is critical to the success of all dairy farms. This book is a substantially revised edition of 'Feeding Concentrates: Supplements for Dairy Cows' DRDC 1993. It focuses on feeding concentrates to pasture fed cows to achieve high milk production per cow per hectare, and will assist farmers to decide which supplements give the best results in their particular situation. The benefits that arise from supplementary feeding include higher stocking rates, promotion of growth in heifers and young cows; better body condition score and increased lactation length when pasture is less available; improved pasture use; reduced cost per tonne of pasture eaten; flexibility to increase milk production when milk prices are high; and increased milk protein content when the energy content in pasture is low. This edition has thoroughly reviewed the issues and clearly documents the results of research particularly for grains supplementation. The summaries and recommendations in each chapter will be particularly helpful to dairy farmers in making best management decisions relating to concentrate feeding.
Download or read book Genome wide Interaction Analyses of Milk Production Traits in Dairy Cattle written by and published by . This book was released on 2020 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is substantial evidence that the genetic background of milk production traits changes during lactation. It is known that the genetic variances for several milk production traits change during lactation and genetic correlations between milk production traits at different lactation stages differ from unity. In addition, for the diacylglycerol O-acyltransferase 1 (DGAT1) K232A polymorphism it has been shown that its effects on milk production traits are not constant during lactation. However, most genome-wide association studies (GWAS) for milk production traits do not account for changes in genetic effects during lactation. Therefore, these GWAS might miss QTL whose effects change during lactation. The objective of this thesis was to scan the whole genome for QTL whose effects on milk production traits change during lactation. First, 4 different GWAS approaches were performed to detect QTL with changing effects on protein content during lactation including an alternative approach; GWAS for genotype by lactation stage interaction. Results showed that the GWAS for genotype by lactation stage interaction identified significant regions that were not detected in GWAS assuming constant SNP effects during lactation. The GWAS for genotype by lactation stage interaction were performed for 7 other milk production traits. In total 7 genomic regions whose effects change during lactation exhibited significant genotype by lactation stage interaction effects. Therefore, GWAS for genotype by lactation stage interaction offered new possibilities to unravel the changes in genetic background of milk production traits. Changes in genetic effects in early lactation might be related to negative energy balance. Effects of pregnancy might cause changes in late lactation. Possible effects of pregnancy were further investigated by studying genotype by pregnancy interaction. Interestingly, the effects of pregnancy on milk production traits differed for DGAT1 genotypes. Finally, GWAS for genotype by season interaction were performed and identified major interaction signals on chromosomes 3 and 14 (DGAT1).
Download or read book Feeding Standards for Australian Livestock written by and published by . This book was released on 1990 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genotypes by Environment Interaction for Holstein Milk Yield and Fitness Traits Between Saudi Arabia and the United States written by Fahad Soliman Al-Hur and published by . This book was released on 2002 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ruminant Nutrition written by Robert Jarrige and published by John Libbey Eurotext. This book was released on 1989 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with feed evaluation systems, the nutrient requirements of ruminant livestock and the feeding value of a wide range of feedstuffs. This book lists about 800 typical forages, 65 crop residues and 120 concentrate and by-product feeds. It is suitable for teachers, specialist scientists and industrialists.
Download or read book Problems of Evolution written by G. F. Gauze and published by . This book was released on 1947 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Dairy Production written by Sarah Flack and published by Chelsea Green Publishing. This book was released on 2011-04-28 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is no simple recipe for setting up and managing a successful organic dairy farm, but this handbook can act as an introduction to important issues in organic dairy production and provide today's organic or transitioning dairy farmer with an overview of the tools and ideas available. Part of the NOFA guides. Organic Dairy Production includes information on: Soils, the foundation of health (manure management) Crop production and grazing management (forage species, pasture management, setting up a grazing system) Livestock (selection, nutrition, winter and summer feed considerations, seasonal milking, habitat, herd health, milk quality) Marketing (selling fluid milk, regulations, facility and equipment, selling raw milk) Recordkeeping The transition to organic Features examples from various farms in the Northeast.
Download or read book Heat Stress and Animal Productivity written by Anjali Aggarwal and published by Springer Science & Business Media. This book was released on 2012-12-30 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Anjali Aggarwal is working as a Senior Scientist at National Dairy Research Institute, Karnal (India). She holds a PhD degree in Animal Physiology and is involved in research and teaching at post-graduate level. Her area of research work is stress and environmental physiology. She has more than 50 publications, two technical bulletins, four manuals and many book chapters to her credit. She has successfully guided many post-graduate and PhD students. Her major research accomplishments are on microclimatic modification for alleviation of heat and cold stress, mist and fan cooling systems for cows and buffaloes, and use of wallowing tank in buffaloes. Her work involves the use of technology of supplementing micronutrients during dry period and early lactation to crossbred and indigenous cows for alleviating metabolic and oxidative stress and improved health and productivity. Studies are also done in her lab on partitioning of heat loss from skin and pulmonary system of cattle and buffaloes as a result of exercise or exposure to heat stress. Dr. R.C. Upadhyay is working as Head, Dairy Cattle Physiology Division at National Dairy Research Institute, Karnal (India). He graduated in Veterinary Sciences and obtained his PhD degree in Animal Physiology. His area of recent research is climate change, stress, and environmental physiology. His major research accomplishment is on climate change impact assessment of milk production and growth in livestock. His work also involves studying methane conversion and emission factors for Indian livestock and use of IPCC methodology of methane inventory of Indian livestock. Heat shock protein-70 expression studies in cattle and buffaloes are also done in his lab. Draught animal power evaluation, fatigue assessment, work-rest cycle and work limiting factors form the highlights of his work. Studies on partitioning of heat loss from skin and pulmonary system of cattle and buffaloes and electrocardiographic studies in cattle, buffalo, sheep and goat are also undertaken in his lab. He has more than 75 research papers, four books and several book chapters to his credit. Technologies developed and research done by him include methodology of methane measurement: open and closed circuit for cattle and buffaloes; inventory of methane emission from livestock using IPCC methodology; livestock stress index: thermal stress measurement based on physiological functions; and draught power evaluation system and large animal treadmill system. He received training in Radio-nuclides in medicine at Australian School of Nuclear Technology, Lucas heights, NSW, Australia in 1985 and Use of radioisotopes in cardiovascular investigations at CSIRO, Prospect, NSW, Australia, during 1985-86. He has guided several post-graduate and PhD students. He is recipient of Hari Om Ashram Award-1990 (ICAR) for outstanding research in animal sciences.
Download or read book Crossbreeding Bos Indicus and Bos Taurus for Milk Production in the Tropics written by E. P. Cunningham and published by Bernan Press(PA). This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mitigation of Greenhouse Gas Emissions in Livestock Production written by Pierre J. Gerber and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2013 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current analysis was conducted to evaluate the potential of nutritional, manure and animal husbandry practices for mitigating methane (CH4) and nitrous oxide (N2O) - i.e. non-carbon dioxide (CO2) - GHG emissions from livestock production. These practices were categorized into enteric CH4, manure management and animal husbandry mitigation practices. Emphasis was placed on enteric CH4 mitigation practices for ruminant animals (only in vivo studies were considered) and manure mitigation practices for both ruminant and monogastric species. Over 900 references were reviewed; simulation and life cycle assessment analyses were generally excluded
Download or read book Dairy Cows written by Catherine T. Hernandez and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. A novel, illustrated classification system to define the causes of bovine perinatal mortality internationally / John F. Mee -- 2. Resetting priorities for sustainable dairy farming under global changing / I. Blanco-Penedo, J. Perea, J.O.L. Cerqueira and R. Payan-Carreira -- 3. Somatic cell count as the factor conditioning productivity of various breeds of cows and technological suitability of milk / Joanna Barlowska, Zygmunt Litwińczuk, Aneta Brodziak and Jolanta Król -- 4. Strategies to improve the reproductive efficiency of dairy cattle / L.S.R. Marinho, F.Z. Machado and M.M. Seneda.
