Download or read book Growth and Maturation of Angus Cattle written by Miroslav Kaps and published by . This book was released on 1997 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.).
Download or read book Relationships Among Measures of Growth from Birth to Maturity in Hereford and Angus Cattle written by James Edmond Brown and published by . This book was released on 1972 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth and Development of Aberdeen Angus Cattle written by and published by . This book was released on 1956 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Animal Growth and Development written by David E. Gerrard and published by Kendall Hunt. This book was released on 2003 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Origin of the Aberdeen Angus and Its Development in Great Britain and America written by American Aberdeen-Angus Breeders' Association and published by . This book was released on 1922 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Mature Weight and Rate of Maturing on Individual Beef Cow Efficiency written by Connell Jean Brown and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Beef Calf written by E. W. Sheets and published by . This book was released on 1920 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Patterns of Growth and Development in Cattle written by H. de Boer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 751 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication contains the proceedings of a seminar held in Ghent, Belgium on October 11th-13th 1977, under the auspices of the Commission of the European Communities, as part of the EEC programme of co-ordination of research on beef production. The seminar was initiated by the scientific working group on 'Carcass and Meat Quality' and attracted the interest of the working groups on 'Genetics and Selection' and on 'Nutrition and Management'. Consequently it developed into a multi-disciplinary programme, organised under the responsibility of the working group on Carcass and Meat Quality. This group comprised Ir. H. de Boer (Chairman), Netherlands; Prof. R. Boccard, France; Dr D.E. Hood, Ireland; Dr R.W. Pomeroy, UK; Dr A. Romita, Italy; Professor Dr L. Sch~n, Fed. Rep. of Germany; Mr P. L'Hermite, CEC; and Dr J.C. Tayler, UK (adviser to the CEC). In view of the broad scope of the subject, a special plan ning meeting was organised, involvi.ng experts from the different disciplines involved. The additional participants were: Dr B. Bech Andersen, Denmarkj Dr A.J.H. van Es, Netherlands; Prof. Dr J. Martin, Belgium; Dr. St.C.S. Taylor, UK. The multidisciplinary scope of this ~eminar follows a series of seminars in 1975-76 on more specific aspects of beef production research in the individual fields involved. It seems logical that further seminars should integrate the approaches by different disciplin~s in order to achieve a balanced programme of research on the very complex topic of beef production.
Download or read book Efficiency and Profit Differences of Angus Charolais and Hereford Cattle Varying in Size and Growth written by V. H. Brungardt and published by . This book was released on 1972 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Origin of the Aberdeen Angus Cattle written by American Aberdeen Angus Breeders' Association and published by Createspace Independent Publishing Platform. This book was released on 2017-10 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This special re-print edition of the American Aberdeen Angus Breeders' Association's "The Origin of the Aberdeen Angus Cattle" is considered one of the most important works ever published on Angus cattle in America. Published in 1922, this important work on Angus cattle, has not seen the light of day since its early publication. Included are insights into the history and development of the Aberdeen Angus Cattle in Great Britain and America, as well as a handy list of references for more information on the subject. Offers a true a snapshot in time for those interested in Angus Cattle. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As a result, some type characters and images might suffer from slight imperfections or minor shadows in the page background.
Download or read book Relationships Among Measures of Growth from Birth to Maturity in Hereford and Angus Cattle written by J. E. Brown and published by . This book was released on 1972 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Biometrical Study of Weight of Angus and Hereford Cows and Growth of Their Progeny written by Larry Arnold Nelson and published by . This book was released on 1967 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beef Heifer Development An Issue of Veterinary Clinics Food Animal Practice written by David J Patterson and published by Elsevier Health Sciences. This book was released on 2013-12-28 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest information on heifer development in beef cattle for the food animal practitioner! Topics include rebuilding the US cowherd, physiology and endocrinology of puberty, nutritional development and the target weight debate, long-term reproductive health, effect of prenatal programming on development, economics of development, synchronization of estrus and ovulation, post breeding heifer management, management strategies for adding value to heifers, and more!
Download or read book Ab rdeen Angus Cattle written by American Angus Association and published by . This book was released on 1958 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Direct and Maternal Influences on Growth of Red Angus Cattle written by John A. Winder and published by . This book was released on 1987 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The History and Development of Aberdeen Angus Cattle in America written by Walter H. Peters and published by . This book was released on 1908 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
