Author: Teresa AlexanderPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 82
Book Description
Growth, Feedlot, and Carcass Traits Evaluation of Angus, Brahman, and Simmental Crossbred Steers
Author: Teresa AlexanderPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 82
Book Description
Response of Feedlot and Carcass Characteristics to Selection and Crossbreeding
Author: Donna Jo CoxPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 270
Book Description
Feedlot Performance and Carcass Characteristics of Crossbred Steers Sired by Brahman, Composite and Simmental Bulls and Fed as Calves and as Yearlings
Author: D. H. CrewsPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 106
Book Description
Feedlot Performance and Carcass Traits of Angus, Brahman, Charolais, and Reciprocal F1 Crosses of the Three Breeds
Author: Masters Theses in the Pure and Applied Sciences
Author: Wade H. ShaferPublisher: Springer Science & Business Media
ISBN: 1461573882
Category : Science
Languages : en
Pages : 414
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.
Evaluation of the Brahman, Beefmaster, Brangus and Santa Gertrudis Breeds for Reproductive Efficiency, Maternal Characteristics, Preweaning and Postweaning Growth Traits, and Carcass Characteristics
Author: Stanley Frank KelleyPublisher:
ISBN:
Category :
Languages : en
Pages : 288
Book Description
Parameter Estimation for Carcass Traits Including Growth Information of Simmental Beef Cattle Using Restricted Maximum Likelihood with a Multiple-trait Model
Author: Brent Wayne WoodwardPublisher:
ISBN:
Category :
Languages : en
Pages : 296
Book Description
Feedlot Performance and Carcass Characteristics of Brahman-European Crossbred and Angus Calves
Author: Frank Sloan BakerPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 14
Book Description
An Evaluation of Genetic Differences for Feedlot Performance and Carcass Traits in Beef Cattle
Author: Brett Lee BarhamPublisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 174
Book Description
Growth and Maturation of Angus Cattle
Author: Miroslav KapsPublisher:
ISBN:
Category : Aberdeen-Angus cattle
Languages : en
Pages : 230
Book Description
The objective of this study was to estimate genetic parameters for growth, maturity and carcass traits, and to analyze relationship of each of these traits with mature weight. Growth data utilized in the study consisted of repeated weight measurements of 3044 Angus cows. A Brody growth curve was fitted to the data for each cow individually in order to predict asymptotic (mature) weight, age when animal reached 65% of mature weight, and weights, growth rates, degrees of maturity and relative growth rates at 365 and 550 days of age. Carcass data consisted of 3477 records of steers, including hot carcass weight, back fat-thickness, rib-eye area, cutability and marbling score. Genetic parameters of mature weight were estimated from a single-trait animal model for asymptotic weight, a two-trait animal model for asymptotic and weaning weight, and a two-trait animal model for repeated mature weights (measured after 4 y of age) and weaning weight. Heritability estimates for growth and carcass traits were obtained by restricted maximum likelihood from a set of two-trait animal models considering a given trait and weaning weight which was in the model to account for any effect of culling. Similarly, genetic correlations between mature weight and other traits were obtained from a set of three-trait models. A sample of 29943 animals was used for weaning weight measurements. Fixed effects in the models included weaning, cow and carcass contemporary groups. For the carcass traits the effect of slaughter age was included in the model as a covariate. Random effects in the model included direct genetic, maternal genetic and permanent environmental effects for weaning weight, but only direct genetic and repeated measurements (if in the model) for each of the other traits. Estimates of heritability for mature weight were. 44,.51 and. 57 for the single-trait model with asymptotic weight, two-trait model with asymptotic weight and two-trait model with repeated weights, respectively. The reduced heritability estimate from the single-trait model was most likely due to the effect of culling, thus, a genetic evaluation for mature size should be considered in a multiple-trait model including mature weight as well as some earlier measured growth trait. (Abstract shortened by UMI.).