Download or read book Reciprocal Cross Differences in Brahman Hereford F2 Cows written by Bradley Allen Wright and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Data from 75 F2 Brahman-Hereford cows of four specific breed combinations, F2 HB (produced by F1 HB sires x F1 HB dams, where "HB" refers to cattle sired by Hereford bulls and out of Brahman cows), F2 BH (produced by F11 BH sires x F1 BHdams), HB x BH and BH x HB, were evaluated for maternal performance at the Texas A & M Research Center near McGregor. Differences between breed combinations were analyzed for calf crop born (CCB), calf crop weaned (CCW), calf survival (CS), birthweight (BW), weaning weight (WW), and cow weight at palpation (PW). The adjusted means for F2 HB, F2 BH, HB x BH, and BH x HB were 0.84 " 0.06, 0.57 " 0.07, 0.82 " 0.06, and 0.62 " 0.08, respectively, for CCW. F2 HB cows had a 0.27 " 0.09 higherpercent calf crop weaned than F2 BH cows (P

Download or read book Performance Comparisons of Angus Hereford Reciprocal Cross Cows and Their Calves written by Stanley Roberts McPeake and published by . This book was released on 1989 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Consolidated Progress Report written by and published by . This book was released on 1976 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theriogenology written by and published by . This book was released on 1978 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international journal of animal reproduction.

Download or read book Applied Muscle Biology and Meat Science written by Ph.D., Min Du and published by CRC Press. This book was released on 2009-05-26 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge of muscle biology is continuing to expand in the animal and food sciences industry, especially the understanding of the mechanisms that control skeletal muscle development, growth, and their impacts on meat production and quality. Applied Muscle Biology and Meat Science provides agriculturalists with state-of-the-art information and a platform to further explore this specialized topic. It also gives novices a comprehensive knowledge base in applied muscle biology and meat science. Many existing problems in meat science and production are due to a lack of understanding of the underlying biological mechanisms of the livestock. Careful to avoid gory processing details, the text focuses on biological changes and the appropriate manage

Download or read book Journal of animal science written by and published by . This book was released on 1980-10 with total page 1270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Note written by and published by . This book was released on 1928 with total page 1964 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 3rd World Congress on Genetics Applied to Livestock Production Introduction breeding programs for dairy and beef cattle sheep and goats water buffalo written by and published by . This book was released on 1986 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 3rd World Congress on Genetics Applied to Livestock Production written by and published by . This book was released on 1986 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 3rd World Congress on Genetics Applied to Livestock Production written by Gordon E. Dickerson and published by . This book was released on 1986 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experiment Station Record written by United States. Office of Experiment Stations and published by . This book was released on 1927 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Master s Theses Directories written by and published by . This book was released on 2007 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".

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Download or read book Experiment Station Record written by U.S. Office of Experiment Stations and published by . This book was released on 1927 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Australian Journal of Scientific Research written by and published by . This book was released on 1965 with total page 1356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Large Ruminants for the Tropics written by J. W. Copland and published by Agribookstore/Winrock. This book was released on 1985 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: