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Additive And Nonadditive Genetic Effects On Growth And Milk Production Traits In Holstein Ayrshire Crossbreeding Experimental Data
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Book Synopsis Additive and Nonadditive Genetic Effects on Growth and Milk Production Traits in Holstein Ayrshire Crossbreeding Experimental Data by : Daniel Perotto
Download or read book Additive and Nonadditive Genetic Effects on Growth and Milk Production Traits in Holstein Ayrshire Crossbreeding Experimental Data written by Daniel Perotto and published by . This book was released on 1992 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Estimates of crossbreeding parameters from mixed-model analyses, were found to be more reliable than those from ordinary least squares analyses. (Abstract shortened by UMI.)" --
Book Synopsis Investigating the Role of Non-additive Genetic Effects on the Genetic Architecture and Control of Fertility and Reproduction Traits in Holsteins by : Kristen Alves
Download or read book Investigating the Role of Non-additive Genetic Effects on the Genetic Architecture and Control of Fertility and Reproduction Traits in Holsteins written by Kristen Alves and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In animal breeding, it is assumed that majority of the variation in a phenotype can be captured by gene variants which combine their effects in an additive manner. In dairy cattle, this assumption works well for most traits. However, for low heritability and complex traits such as fertility and reproduction traits, additive genetic effects may not capture most of the variation. This thesis set out to explore whether it is possible to capture interactions between alleles at one loci (dominance) and between alleles at different loci (additive by additive epistasis) to improve our understanding of the genetic architecture and control of fertility and reproduction traits in Holstein cattle. Additive, dominance, and epistatic genetic variance components using pedigree and genomic relationship matrices were estimated. Dominance and epistasis contributed a larger proportion of the total phenotypic variance than the additive model currently used in practice. Three transformations to the Hadamard product for deriving the epistatic relationship matrix on the estimation of epistatic genetic variance components was investigated. While removing the interaction of a marker with itself decreased the confounding between additive and epistatic genetic effects, there was not a clear advantage as to which matrix was best. Genomic predictions were performed to assess the impact of including genomic information, epistasis, and the variants of the epistatic genomic relationship matrix on the reliability of and bias in model predictions. The results suggest fitting epistatic genetic effects in genomic evaluation models may yield an improvement in the prediction of breeding values and future phenotypes. Lastly, a genome-wide association study was performed to investigate the genetic architecture of the traits. The results suggest that significant epistatic genetic effects are probably due to many loci with a small effect rather than few loci with a large effect. Improving our understanding of the genetic architecture and control of fertility and reproduction traits will help in the proper estimation of breeding values and correct ranking of candidate parents for the next generation. This research emphasizes the need for a re-examination of our tools to help detect causal links between genetic and phenotypic variation.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993-07 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Additive and Nonadditive Genetic Effects for Growth, Milk Yield and Reproduction Trants of Crossbreed (bos Taurus X Bos Indicus) Cattle in the and Dry Enviromental in Ethiopia by : B. Kebede
Download or read book Estimation of Additive and Nonadditive Genetic Effects for Growth, Milk Yield and Reproduction Trants of Crossbreed (bos Taurus X Bos Indicus) Cattle in the and Dry Enviromental in Ethiopia written by B. Kebede and published by . This book was released on 1992 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Association Studies for Time-dependent Genetic Effects on Milk Production Traits in Holstein Friesian Dairy Cattle by : Eva Maria Strucken
Download or read book Association Studies for Time-dependent Genetic Effects on Milk Production Traits in Holstein Friesian Dairy Cattle written by Eva Maria Strucken and published by . This book was released on 2012 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research in Cattle Production by : A. Neimann-Sørensen
Download or read book Research in Cattle Production written by A. Neimann-Sørensen and published by . This book was released on 1987 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Animal Science written by and published by . This book was released on 1981 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1991 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1994 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetics Abstracts written by and published by . This book was released on 1981 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Dairy Science written by and published by . This book was released on 1959 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Milk Production from Pasture by : Colin William Holmes
Download or read book Milk Production from Pasture written by Colin William Holmes and published by . This book was released on 1984 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Branch Report by : Canada. Agriculture Canada. Research Branch
Download or read book Research Branch Report written by Canada. Agriculture Canada. Research Branch and published by . This book was released on 1984 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Animal Genomics by : Bhanu P. Chowdhary
Download or read book Animal Genomics written by Bhanu P. Chowdhary and published by S. Karger AG (Switzerland). This book was released on 2003 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides an update on the current status of gene maps in different livestock and pet/companion animal species. The findings summarized in species specific commentaries and original articles testify the rapid advances made in the field of animal genomics. Of significant interest is the fact that current investigations are providing headways for two important and exciting research fronts: targeted high-resolution mapping leading to the application of genomic information in addressing questions of economic and biological significance in animals, and the initiation of whole genome sequencing projects for some of the animal species. Like in humans and mice, this will set the stage for a new level of research and real time complex analysis of the genomes of these species. Animal Genomics signifies the beginning of a new era in this field and celebrates the achievements of the past 20 years of genomics research. It will be of special interest to researchers involved in genome analysis - both gross chromosomal as well as molecular - in various animal species, and to comparative and evolutionary geneticists.
Book Synopsis Crossbreeding Bos Indicus and Bos Taurus for Milk Production in the Tropics by : E. P. Cunningham
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:
Book Synopsis Bovine Reproduction by : Richard M. Hopper
Download or read book Bovine Reproduction written by Richard M. Hopper and published by John Wiley & Sons. This book was released on 2014-08-18 with total page 2206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Reproduction is a comprehensive, current reference providing information on all aspects of reproduction in the bull and cow. Offering fundamental knowledge on evaluating and restoring fertility in the bovine patient, the book also places information in the context of herd health where appropriate for a truly global view of bovine theriogenology. Printed in full color throughout, the book includes 83 chapters and more than 550 images, making it the most exhaustive reference available on this topic. Each section covers anatomy and physiology, breeding management, and reproductive surgery, as well as obstetrics and pregnancy wastage in the cow. Bovine Reproduction is a welcome resource for bovine practitioners, theriogenologists, and animal scientists, as well as veterinary students and residents with an interest in the cow.
Book Synopsis Guidelines for Uniform Beef Improvement Programs by : Dixon D. Hubbard
Download or read book Guidelines for Uniform Beef Improvement Programs written by Dixon D. Hubbard and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
