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Quantitative Genetic Analyses Of Growth Traits In Sheep Under Different Models Of Inheritance
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Book Synopsis Quantitative Genetic Analyses of Growth Traits in Sheep Under Different Models of Inheritance by : Nikolaos Maniatis
Download or read book Quantitative Genetic Analyses of Growth Traits in Sheep Under Different Models of Inheritance written by Nikolaos Maniatis and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bru - Hu written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantitative Genetics in Sheep Breeding by : Helen Newton Turner
Download or read book Quantitative Genetics in Sheep Breeding written by Helen Newton Turner and published by . This book was released on 1969 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic analyses of survival, growth and reproduction traits of Suffolks, with the use of an animal model by : Stephen Alexander Barwick
Download or read book Genetic analyses of survival, growth and reproduction traits of Suffolks, with the use of an animal model written by Stephen Alexander Barwick and published by . This book was released on 1989 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Detection and Characterisation of Quantitative Trait Loci Affecting Muscle and Growth Phenotypes in Sheep by : Georgia Hadjipavlou
Download or read book Detection and Characterisation of Quantitative Trait Loci Affecting Muscle and Growth Phenotypes in Sheep written by Georgia Hadjipavlou and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis addresses the dissection and characterisation of quantitative trait loci (QTL) affecting production traits in sheep. Firstly, the association between specific genetic polymorphisms and complex variation in weight, muscle and fat depositions was investigated. Research concentrated on assessing the presence, correspondence and significance of two single nucleotide polymorphisms (SNPs) in the GDF8 region of ovine chromosome 2, reportedly affecting muscle production. Commercial populations of British Texel, Suffolk and Charollais sheep were studied. The SNPs were absent in Suffolk and almost fixed in Texel breeds. In the Charollais population, the SNPs segregated at intermediate frequencies and a significant association was found between these polymorphisms and muscle depth. The previously proposed causative allele at one of the loci resulted in increased muscle depth and, at allele frequency of 0.5, this locus would explain one third of the additive genetic variance for the trait. Partial recessive allelic expression is proposed by genotypic value predictions and is consistent with the previously postulated molecular mechanism by which it gives rise to muscle changes. Secondly, the thesis focused on detection of QTL associated with growth. Live weight is a composite of growth rates over time, with inter-age genetic correlations for live weight decreasing as time between weight measurements increases. To explore whether observed genetic correlation patterns translate into distinct loci acting on weight at different growth stages, a novel method was developed and the applicability of a second proposed method was explored. Both methods allowed simultaneous analysis of multiple live weights per animal, while accounting differently for the correlation among measurements ordered in time. In the first approach, a growth curve technique was developed and employed to map growth QTL for curve parameters and predicted growth descriptors. A study of actual live weights identified significant QTL at different ages on distinct chromosomes, with QTL significance and variance changing over time. Further application of this technique on a simulated dataset validated its effectiveness in detecting age-dependent QTL. An extension of the procedure resulted in a novel technique for genomic evaluation of longitudinal traits. In the second method examined, random regression (RR) models were applied for dissection of growth QTL. Systematic model selection and inclusion of relevant random effects resulted in apparently significant QTL, but the method was computationally demanding, model choice proved challenging and the results were questioned. To further explore the method, RR models were applied to various simulated growth phenotypes composed of time-dependent QTL trajectories, polygenic and environmental effects. Statistically optimal RR models succeeded in identifying significant QTL and predicting the simulated time-dependence for most scenarios. However, the issue of model choice was again prominent, as suboptimal models resulted in unreliable QTL variance trajectories and pronounced confounding between different time-dependent effects. Thus, the growth curve approach appeared to be the more flexible and robust process for analysing longitudinal data to map agedependent QTL.
Book Synopsis Quantitative Genetics in the Wild by : Anne Charmantier
Download or read book Quantitative Genetics in the Wild written by Anne Charmantier and published by Oxford University Press. This book was released on 2014 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the expertise of 30 evolutionary biologists from around the globe to highlight how applying the field of quantitative genetics - the analysis of the genetic basis of complex traits - aids in the study of wild populations.
Book Synopsis The Genetics of Sheep by : Laurie Piper
Download or read book The Genetics of Sheep written by Laurie Piper and published by Cabi. This book was released on 1997 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systematics and phylogeny of the sheep;Genetic aspects of domestication, common breeds and their origin; Genetics of colour and hair texture; Genetics of morphological traits and inherited disorders; Biochemical genetics; Molecular genetics of sheep; Molecular genetics of immune molecules; Genetics of disease resistance and vaccine response; Molecular biology and genetics of scrapie in sheep; Cytogenetics: physical chromosome maps; The sheep linkage map; Genetics of behaviour; Biology and genetics of reproduction; Modern reproduction technologies and transgenics; Developmental genetics; Genetic resources and conservation; Genetic improvement of wool production; Genetics of meat quality; Genetics of milk production; Genetic improvement of sheep; Standardized genetic nomenclature for sheep.
Book Synopsis Quantitative Genetic Studies of Behavioral Evolution by : Christine R. B. Boake
Download or read book Quantitative Genetic Studies of Behavioral Evolution written by Christine R. B. Boake and published by University of Chicago Press. This book was released on 1994-08-15 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taken together, these studies document both the benefits and pitfalls of quantitative genetics.
Book Synopsis Advances in Statistical Methods for Genetic Improvement of Livestock by : Daniel Gianola
Download or read book Advances in Statistical Methods for Genetic Improvement of Livestock written by Daniel Gianola and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in statistics and computing as well as their application to genetic improvement of livestock gained momentum over the last 20 years. This text reviews and consolidates the statistical foundations of animal breeding. This text will prove useful as a reference source to animal breeders, quantitative geneticists and statisticians working in these areas. It will also serve as a text in graduate courses in animal breeding methodology with prerequisite courses in linear models, statistical inference and quantitative genetics.
Book Synopsis Phenotypic Characterization of Animal Genetic Resources by :
Download or read book Phenotypic Characterization of Animal Genetic Resources written by and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: These guidelines are part of a series of publications produced by FAO to support countries in the implementation of the Global Plan of Action for Animal Genetic Resources.
Download or read book Soay Sheep written by T. H. Clutton-Brock and published by Cambridge University Press. This book was released on 2004-03-04 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soay Sheep synthesises one of the most detailed studies of demography and dynamics in a naturally regulated population of mammals. Unlike most other large mammals, the Soay sheep population of Hirta in the St Kilda archipelago show persistent oscillations, sometimes increasing or declining by more than 60% in a year. Soay Sheep explores the causes of these oscillations and their consequences for selection on genetic and phenotypic variation within the population, drawing on studies over nearly twenty years of the life-histories and reproductive careers of many individuals. Covering population dynamics, demography and their effects on selection, energetic and resource limitations on the interaction between sheep and parasites, and the adaptive significance of their reproductive characteristics, it provides unique insights into the regulation of other herbivore populations and the effects of environmental change on selection and adaptation. It will be essential reading for vertebrate ecologists, demographers, evolutionary biologists and behavioural ecologists.
Book Synopsis Safety of Genetically Engineered Foods by : National Research Council
Download or read book Safety of Genetically Engineered Foods written by National Research Council and published by National Academies Press. This book was released on 2004-07-08 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Assists policymakers in evaluating the appropriate scientific methods for detecting unintended changes in food and assessing the potential for adverse health effects from genetically modified products. In this book, the committee recommended that greater scrutiny should be given to foods containing new compounds or unusual amounts of naturally occurring substances, regardless of the method used to create them. The book offers a framework to guide federal agencies in selecting the route of safety assessment. It identifies and recommends several pre- and post-market approaches to guide the assessment of unintended compositional changes that could result from genetically modified foods and research avenues to fill the knowledge gaps.
Book Synopsis Breeding for Disease Resistance in Farm Animals by : Stephen C. Bishop
Download or read book Breeding for Disease Resistance in Farm Animals written by Stephen C. Bishop and published by CABI. This book was released on 2010 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressing principles associated with breeding animals for enhanced health and resistance to specific diseases, this book provides a review of the field illustrated with examples covering many diseases of importance to livestock production, across all major livestock species. Authored by experts in the field, this updated edition covers techniques and approaches, viruses, TSEs, bacteria, parasites, vectors, and broader health issues seen in production systems, including metabolic diseases. The book will be an essential reference for professionals in the field, scientists and researchers, students, breeders, veterinarians, agricultural advisors and policy makers.
Author :Food and Agriculture Organization of the United Nations Publisher :Fao ISBN 13 :9789251001523 Total Pages :0 pages Book Rating :4.0/5 (15 download)
Book Synopsis Sheep and Goat Breeding by : Food and Agriculture Organization of the United Nations
Download or read book Sheep and Goat Breeding written by Food and Agriculture Organization of the United Nations and published by Fao. This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: FAO economic and social development series no/ 3/12. - Designed as handbooks for 2 year intermediate level agricultural and training course. Translated and adapted from the French
Book Synopsis Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards by :
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2001 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Book Synopsis Evolution and Selection of Quantitative Traits by : Bruce Walsh
Download or read book Evolution and Selection of Quantitative Traits written by Bruce Walsh and published by Oxford University Press. This book was released on 2018-06-21 with total page 1504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative traits-be they morphological or physiological characters, aspects of behavior, or genome-level features such as the amount of RNA or protein expression for a specific gene-usually show considerable variation within and among populations. Quantitative genetics, also referred to as the genetics of complex traits, is the study of such characters and is based on mathematical models of evolution in which many genes influence the trait and in which non-genetic factors may also be important. Evolution and Selection of Quantitative Traits presents a holistic treatment of the subject, showing the interplay between theory and data with extensive discussions on statistical issues relating to the estimation of the biologically relevant parameters for these models. Quantitative genetics is viewed as the bridge between complex mathematical models of trait evolution and real-world data, and the authors have clearly framed their treatment as such. This is the second volume in a planned trilogy that summarizes the modern field of quantitative genetics, informed by empirical observations from wide-ranging fields (agriculture, evolution, ecology, and human biology) as well as population genetics, statistical theory, mathematical modeling, genetics, and genomics. Whilst volume 1 (1998) dealt with the genetics of such traits, the main focus of volume 2 is on their evolution, with a special emphasis on detecting selection (ranging from the use of genomic and historical data through to ecological field data) and examining its consequences.
Book Synopsis Linear Models for the Prediction of Animal Breeding Values by : R. A. Mrode
Download or read book Linear Models for the Prediction of Animal Breeding Values written by R. A. Mrode and published by Cab International. This book was released on 2014 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of producing desirable traits in offspring such as increased growth rate or superior meat, milk and wool production is a vital economic tool to the animal scientist. Summarizing the latest developments in genomics relating to animal breeding values and design of breeding programs, this new edition includes models of survival analysis, social interaction and sire and dam models, as well as advancements in the use of SNPs in the computation of genomic breeding values.
