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Author : Jainti Pershad Jain
Publisher :
ISBN 13 :
Total Pages : 548 pages
Book Rating : 4.:/5 (19 download)
Download or read book Heterosis in Post-weaning Traits in Beef Cattle written by Jainti Pershad Jain and published by . This book was released on 1969 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Larry V. Cundiff
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.X/5 (3 download)
Download or read book Beef Cattle Breeding written by Larry V. Cundiff and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Richard Peterson McDonald
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (132 download)
Download or read book Estimation of Maternal Heterosis in Pre-weaning Traits and Prediction of Rotational Crossbreeding Performance in Beef Cattle written by Richard Peterson McDonald and published by . This book was released on 1972 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States Agricultural Research Service
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (89 download)
Download or read book Beef Cattle Breeding written by United States Agricultural Research Service and published by . This book was released on 1977 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Siriwat Sarobol
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.:/5 (163 download)
Download or read book Genetic and Environmental Effects on Post-weaning Traits of Range Beef Cattle written by Siriwat Sarobol and published by . This book was released on 1969 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Asiye Yilmaz
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (132 download)
Download or read book Heterosis Levels for Beef Cattle Preweaning Traits written by Asiye Yilmaz and published by . This book was released on 1996 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Evelyn F. Gray
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (568 download)
Download or read book Heterosis Expression for Preweaning Traits Under Commercial Beef Cattle Conditions written by Evelyn F. Gray and published by . This book was released on 1978 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Julius Dingfelder
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (592 download)
Download or read book The Effect of Heterosis on Reproductive and Preweaning Traits in Crosses of Three British Breeds of Beef Cattle written by John Julius Dingfelder and published by . This book was released on 1979 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fentress McCoughan Peacock
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (17 download)
Download or read book Additive Genetic and Heterosis Effects For Calf and Maternal Influence on Post-Weaning Growth and Carcass Traits of Angus, Brahman, and Charolais Crosses written by Fentress McCoughan Peacock and published by . This book was released on 1982 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lauren N. Schiermiester
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (1 download)
Download or read book Estimation of Breed-specific Heterosis Effects for Birth, Weaning and Yearling Weight in Cattle written by Lauren N. Schiermiester and published by . This book was released on 2014 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic selection decisions are important components of improved beef production efficiency. Exploiting heterosis and breed complementarity can improve economically relevant traits and system efficiency. The objective of the current study was to estimate breed-specific heterosis for the seven largest beef breeds (according to registrations) for birth, weaning and yearling weight. Birth, weaning and yearling weights were recorded for steers, heifers and bulls (n= 6,834) from Cycle VII and advanced generations of the Germ Plasm Evaluation project of the U.S. Meat Animal Research Center. Breeds represented in these data included: Angus, Hereford, Red Angus, Charolais, Gelbvieh, Simmental, Limousin and composite MARC III. Model 1 estimated heterosis assuming different levels within and between biological types (British or Continental). Model 2 estimated breed-specific heterosis (a different level of heterosis for each pair of breeds). Heterosis was assumed proportional to expected breed heterozygosity. Direct heritability estimates (SE) for birth, weaning and yearling weight for Model 1 were 0.42 (0.04), 0.22 (0.03) and 0.39 (0.05), respectively. The direct heritability estimates (SE) for Model 2 were the same as Model 1 except yearling weight heritability was 0.38 (0.05). There were differences in levels of heterosis based on biological type (Model 1) and breed (Model 2). Model 1 results for the British x British (BxB), British x Continental (BxC) and Continental x Continental (CxC) heterosis estimates for birth weight were 0.47 (0.37), 0.75 (0.32) and 0.73 (0.54) kg, respectively. The BxB, BxC and CxC heterosis estimates for weaning weight were 6.43 (1.80), 8.65 (1.54) and 5.86 (2.57) kg, respectively. Yearling weight estimates for BxB, BxC and CxC heterosis were 17.59(3.06), 13.88 (2.63) and 9.12 (4.34) kg, respectively. Breed differences exist and can lead to varying levels of heterosis. Specific estimates of heterosis could be useful when selecting breeds for a crossbreeding system and developing composite populations for various production environments and could be useful in multibreed evaluations as heterosis and breed differences are needed to accurately adjust records to produce genetic predictions..
Author : Diedrich Reimer
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (247 download)
Download or read book Heterosis in Preweaning and Weaning Traits Among Crosses of the Hereford, Angus, and Charolais Breeds written by Diedrich Reimer and published by . This book was released on 1971 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George Forbes Ellis (Jr.)
Publisher :
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.:/5 (57 download)
Download or read book A Biometrical Evaluation of Heterosis in Beef Cattle written by George Forbes Ellis (Jr.) and published by . This book was released on 1963 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marc Stephen Taylor
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (424 download)
Download or read book Heterosis and Productivity Estimates for Preweaning Traits in Brahman Crossbred Beef Cattle written by Marc Stephen Taylor and published by . This book was released on 1978 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract.
Author : Lydia Boenig
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (779 download)
Download or read book Heterosis and Heterosis Retention for Reproductive and Maternal Traits in Brahman X Hereford Crossbred Cows written by Lydia Boenig and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Calf crop born, calf crop weaned, calf birth weight, calf weaning weight, and cow weight at weaning were evaluated from 1996 to 2009 in Brahman (B) and Hereford (H) straightbred and crossbred cows (n = 1,515). The objective of these analyses was to estimate heterosis for F1 and F2 females for these reproductive and maternal traits. Breed groups included B, H, F1 Hereford-sired (HB) and Brahman-sired (BH) cows (n = 114 purebreds, 55 F1, 52 F2). Second generation breed groups included cows sired by HB and out of HB dams (F2HB) and BH dams (HBxBH); and cows sired by BH and out of HB dams (BHxHB) and BH dams (F2BH). Least squares means were calculated for calf crop born, calf crop weaned, and calf birth and weaning weights, using numerous different models, where the trait was the dependent variable. Previous research and these preliminary analyses showed that the effects of year and cow age are real as is their interaction each other and with breed type. In each attempted model designed to remove these effects, different breed groups received excessive adjustments, rendering the resultant heterosis estimates inappropriate. To more clearly assess differences, presentation and visual evaluation of unadjusted means were conducted. The model for mature cow weight (cows at 6 years of age) included breed group as fixed effects and cow within breed group and year as random effects. F2 cows appeared to retain approximately 39% of F1 heterosis for calf crop born and approximately 50% for calf crop weaned. HB x BH cows delivered the lightest calves at 33.9 (4.74) kg and F2BH had the heaviest calves at birth at 36.6 (5.37) kg. BH cows weaned the heaviest calves at 240.9 (38.1) kg and F2BH cows weaned the lightest calves at 208.4 (31.9) kg. Sire breed of calf and age of cow appear to be important factors regarding weight traits. Retained heterosis for cow weight at weaning was higher than expected at 73%. Sire breed group differences (HB vs. BH) for these traits in F2 cows may merit further investigation.
Author : F. E. Barton
Publisher :
ISBN 13 : 9780160000980
Total Pages : 110 pages
Book Rating : 4.0/5 (9 download)
Download or read book Near Infrared Reflectance Spectroscopy (NIRS) written by F. E. Barton and published by . This book was released on 1989 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Equipment; Analysis procedures; Understanding Nirs; Calibration; Nirs technology transfer; Future applications of nirs; Certification procedures.
Author : Tony J. Cunha
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (319 download)
Download or read book Crossbreeding Beef Cattle written by Tony J. Cunha and published by . This book was released on 1963 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains reports presented by speakers at the Beef Cattle Short Course on Crossbreeding which was held at the University of Florida, April 12-14, 1961. The Short Course was designed to bring together the availabre information on crossbreeding of beef cattle. Accordingly, this book is a summary of what is presently known about this subject. It includes reports from Florida, Texas, Louisiana, Georgia, and other areas where considerable crossbreeding work with Brahman and British breeds is being conducted.
Author : Dixon D. Hubbard
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (319 download)
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:
