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:
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.
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:
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:
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:
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.
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.
Download or read book The Genetic and Environmental Aspects of Maternal Effects Upon Weaning Weight of Beef Calves written by Richard Carroll Thomas and published by . This book was released on 1968 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Co variance Components for a Joint Sire and Dam Evaluation of Weaning Weight in American Simmental Cattle written by Harris Benedict Wright and published by . This book was released on 1987 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Genetic and Environmental Parameters of Weaning Weight and Weaning Grade in Hereford Cattle written by Kurt Eberhard Sittmann and published by . This book was released on 1963 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book 5th World Congress on Genetics Applied to Livestock Production written by Ontario Agricultural College. Department of Animal and Poultry Science and published by Guelph, Ont. : Department of Animal & Poultry Science, University of Guelph. This book was released on 1994 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Restricted Selection Indexes written by Benito Guillermo Mendoza Donoso and published by . This book was released on 1983 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct and Maternal Genetic Parameter Estimates for Individual Birth Weight Weaning Weight and Probe Weight of Yorkshire and Landrace Pigs written by Kristen Alves and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Parameters For Docility Weaning Weight Yearling Weight And Intramuscular Fat Percentage In Hereford Cattle written by José Antonio Torres Vázquez and published by . This book was released on 2016 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperament in cattle can be described as the reactivity or fear response to human handling, and it is important to beef cattle producers not only from a human safety but also due to potential correlations with other economically traits. Before a docility selection metric can be added to a genetic evaluation, any potential antagonisms with economically relevant traits should be quantified. The objective was to estimate genetic parameters, including genetic correlations, for chute score (CS), weaning weight (WW), yearling weight (YW), and intramuscular fat percentage (IMF) in Hereford cattle. Single-trait and bivariate animal models were used to estimate heritabilities and genetic correlations. Models included fixed effects of sex and contemporary group, defined as herd–year–season. Direct genetic and residual components were included as random effects. For CS and WW, also additional random effects of maternal genetic and maternal permanent environment were fitted. For CS, WW, YW, and IMF, heritability estimates were 0.27 ± 0.02, 0.35 ± 0.03, 0.36 ± 0.02, and 0.27 ± 0.02, respectively. Genetic correlations between CS and WW, CS and YW, CS and IMF, WW and YW, WW and IMF, and YW and IMF were –0.12 ± 0.06, –0.10 ± 0.05, –0.08 ± 0.06, 0.47 ± 0.05, –0.19 ± 0.09, and –0.41 ± 0.05, respectively. Heritability estimates for all traits suggest that they would respond favorably to selection, although the selection for increased WW or YW could decrease marbling, which is often associated with favorable meat quality. Genetic correlations between CS and WW, YW, and IMF were all favorable but weak, suggesting that selection for improved docility will not have negative consequences on growth or meat quality. Maternal additive and maternal permanent environmental variances for CS were close to zero, suggesting that their inclusion in National Cattle Evaluations is not warranted.
Download or read book Estimation of Maternal Effects on Birth and Weaning Weight of Hereford Cattle written by Rodolfo Juan Carlos Cantet and published by . This book was released on 1984 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of co variance Components to Perform a Multiple Trait Sire Evaluation for Canadian Simmental Cattle written by Harris Benedict Wright and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1987 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
