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Estimation Of Additive And Nonadditive Direct And Maternal Genetic Effects For Reproductive Traits In Beef Cattle
Download Estimation Of Additive And Nonadditive Direct And Maternal Genetic Effects For Reproductive Traits In Beef Cattle full books in PDF, epub, and Kindle. Read online Estimation Of Additive And Nonadditive Direct And Maternal Genetic Effects For Reproductive Traits In Beef Cattle ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Estimation of Additive and Nonadditive Direct and Maternal Genetic Effects for Reproductive Traits in Beef Cattle by : Allen Richard Williams
Download or read book Estimation of Additive and Nonadditive Direct and Maternal Genetic Effects for Reproductive Traits in Beef Cattle written by Allen Richard Williams and published by . This book was released on 1988 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Individual and Maternal Additive and Nonadditive Genetic Effects on Preweaning Traits of Beef Cattle by : Ricardo Jose Vaamonde
Download or read book Estimation of Individual and Maternal Additive and Nonadditive Genetic Effects on Preweaning Traits of Beef Cattle written by Ricardo Jose Vaamonde and published by . This book was released on 1983 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract.
Book Synopsis Estimation of Direct and Maternal Additive and Heterotic Genetic Effects for Preweaning Traits in Beef Cattle by : Chi Lawrence Tawah
Download or read book Estimation of Direct and Maternal Additive and Heterotic Genetic Effects for Preweaning Traits in Beef Cattle written by Chi Lawrence Tawah and published by . This book was released on 1987 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract.
Book Synopsis Estimation of Direct and Maternal Additive and Heterotic Effects for Preweaning Growth Traits in Cattle Breeds Represented in the Southern Region by : Wayne Edward Wyatt
Download or read book Estimation of Direct and Maternal Additive and Heterotic Effects for Preweaning Growth Traits in Cattle Breeds Represented in the Southern Region written by Wayne Edward Wyatt and published by . This book was released on 1986 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Additive and Heterotic Direct and Maternal Genetic Effects for Carcass Traits in Beef Steers by : Sidney Marc DeRouen
Download or read book Estimation of Additive and Heterotic Direct and Maternal Genetic Effects for Carcass Traits in Beef Steers written by Sidney Marc DeRouen and published by . This book was released on 1990 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Additive and Nonadditive Genetic Effects for Growth, Milk Yield and Reproduction Traits of Crossbred (Bos Taurus X Bos Indicus) Cattle in the Wet and Dry Environments in Ethiopia by : Beyene Kebede
Download or read book Estimation of Additive and Nonadditive Genetic Effects for Growth, Milk Yield and Reproduction Traits of Crossbred (Bos Taurus X Bos Indicus) Cattle in the Wet and Dry Environments in Ethiopia written by Beyene Kebede and published by . This book was released on 1992 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Simulation and Analytical Study of Sources Affecting Genetic Correlation Estimates for Additive Direct and Maternal Effects of Weaning Weight by : Chaeyoung Lee
Download or read book A Simulation and Analytical Study of Sources Affecting Genetic Correlation Estimates for Additive Direct and Maternal Effects of Weaning Weight written by Chaeyoung Lee and published by . This book was released on 1995 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Additive and Heterotic Genetic Effects and Maternal Effects on Crossbreeding Beef Cattle by : Oswaldo Rodriguez
Download or read book Estimation of Additive and Heterotic Genetic Effects and Maternal Effects on Crossbreeding Beef Cattle written by Oswaldo Rodriguez and published by . This book was released on 1978 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Direct and Maternal Additive and Heterotic Effects for Measures of Size, Growth and Maturing Pattern in Cattle by : Mohamed Ariff Omar
Download or read book Estimation of Direct and Maternal Additive and Heterotic Effects for Measures of Size, Growth and Maturing Pattern in Cattle written by Mohamed Ariff Omar and published by . This book was released on 1984 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Direct and Maternal Genetic Effects on Weaning Weight of Beef Calves by : David George St. Louis
Download or read book Estimation of Direct and Maternal Genetic Effects on Weaning Weight of Beef Calves written by David George St. Louis and published by . This book was released on 1974 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Direct and Maternal Effects on Beef Cattle by : J. W. Wilton
Download or read book Direct and Maternal Effects on Beef Cattle written by J. W. Wilton and published by . This book was released on 1991 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: In cattle, pre-weaning (WG) and calving ease (CE) are referred to as maternal traits which have both a genetic and a behavioral basis. This study separates the direct and maternal effects of both WG and CE and estimates the heritability of each.
Book Synopsis Genetic Evaluation for Growth Traits, Reproductive Performance and Meat Tenderness in Beef Cattle by : Lisa Praharani
Download or read book Genetic Evaluation for Growth Traits, Reproductive Performance and Meat Tenderness in Beef Cattle written by Lisa Praharani and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: A genetic evaluation of Bali cattle (Bos javanicus) using data from the Bali Cattle Improvement Project on the island of Bali was conducted. Results showed that contemporary group, sex of calf, age of calf and dam affected growth traits. Genetic improvement through selection for W-350d (h2 sub d= 0.5) might be achieved more quickly than selection for W-190d (h2 sub d= 0.4) and their positive direct genetic correlation (r sub d= 0.74). The estimates of maternal effects in Bali cattle were not different from 0; however, the genetic correlation between direct and maternal was moderately negative. The decline in W-350d might be caused by factors other than genetic due to the observed genetic values of W-190d and W-350d. A second study of the response to divergent selection for meat tenderness using Warner-Bratzler Shear Force (WBSF) values of Angus bulls was conducted at the Santa Fe Beef Research Unit of the University of Florida.
Book Synopsis Direct and Maternal Effects on Beef Cattle by :
Download or read book Direct and Maternal Effects on Beef Cattle written by and published by . This book was released on 1991 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: In cattle, pre-weaning (WG) and calving ease (CE) are referred to as maternal traits which have both a genetic and a behavioral basis. This study separates the direct and maternal effects of both WG and CE and estimates the heritability of each.
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 Estimates of Direct Additive, Maternal Additive and Heterotic Effects for Preweaning Traits Realized from Crossing of Angus and Hereford Breeds by : Endre Fink
Download or read book Estimates of Direct Additive, Maternal Additive and Heterotic Effects for Preweaning Traits Realized from Crossing of Angus and Hereford Breeds written by Endre Fink and published by . This book was released on 1990 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetics and the Behavior of Domestic Animals by : Peter J. Chenoweth
Download or read book Genetics and the Behavior of Domestic Animals written by Peter J. Chenoweth and published by Elsevier Inc. Chapters. This book was released on 2013-04-22 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter describes the reproductive and maternal behaviors of different livestock species (cattle, horses, pigs, goats, and water buffalo) with an emphasis on those traits which are genetically conserved. All of the species discussed are polygynous and promiscuous, and females undergo estrous cycles in which males are mainly attracted by movement and posture cues. Major differences in both reproductive and maternal behaviors are observed between “prey” and “predator” type species. Genetic variation also occurs within species, with breed and line differences being observed in all of the behaviors discussed, allowing selection for optimal reproductive and maternal behaviors. However, modern livestock systems, which emphasize production traits, can diminish reproductive and maternal traits and increase detrimental behaviors, such as piglet crushing and savaging in sows. With modern selection tools, greater emphasis on positive reproductive and maternal traits is achievable within the context of profitable production.
