Zobrazeno 1 - 10
of 22
pro vyhledávání: '"P. F. Parnell"'
Autor:
Antonio Reverter, Yutao Li, Brad C. Hine, Christian J Duff, Laercio R. Porto-Neto, Aaron Ingham, P. F. Parnell, Andrew Byrne
Publikováno v:
Animal Production Science. 61:1884-1892
Context Genomic-based technologies are allowing commercial beef producers to predict the genetic merit of individual animals of unknown pedigree with increased ease and accuracy. Genomic selection tools that can accurately predict the feedlot and car
Publikováno v:
Animal Production Science. 61:1837-1844
Context Improving meat quality traits such as marbling is a well established breeding objective for many beef producers. More recently, the inclusion of feed efficiency is being considered. The main driving factors being the direct feed cost, as well
Publikováno v:
Translational Animal Science
The improvement of carcass traits is an important breeding objective in beef cattle breeding programs. The most common way of selecting for improvement in carcass traits is via indirect selection using ultrasound scanning of selection candidates whic
Publikováno v:
Animal Production Science. 58:1
Cow–calf efficiency or maternal productivity is highly correlated with total system efficiency of beef production. Balancing the needs of the cow herd with other production components is a daily challenge beef producers address to maximise the numb
Publikováno v:
Animal Production Science. 58:145
The genetics of body composition traits measured before calving and at weaning in the first and second parities were evaluated in 5975 Angus and 1785 Hereford cows. Traits measured were liveweight, body condition score and hip height and ultrasound s
Autor:
Stephen Barwick, F. M. Jones, K. J. Copping, J.M. Accioly, P. F. Parnell, Michael Laurence, Michelle L. Hebart, R. M. Herd, E. J. Speijers, M. P. B. Deland, Robert Banks, Wayne S. Pitchford, Kath Donoghue, G.D. Tudor, N. J. Edwards, Anne L. Barnes, S. J. Lee, W. A. McKiernan, J. F. Graham
Publikováno v:
Animal Production Science. 58:20
Australian seedstock cattle breeders have expressed concerns that while there has been genetic improvement in feedlot and abattoir performance of cows, it could have led to a decline in maternal productivity, especially under variable nutritional con
Publikováno v:
Livestock Production Science. 57:33-40
Beef cattle are often selected for increased growth performance. There has been some concern that selection for increased growth rate may reduce reproductive performance of females and increase the incidence of dystocia. A selection experiment was co
Publikováno v:
Animal Science. 67:171-182
Genetic and phenotypic variation in post-weaning growth, food intake, efficiency and body composition of mice post weaning and at maturity, were examined to determine whether genetic variation in efficiency exists and to predict likely responses to s
Publikováno v:
Livestock Production Science. 54:183-192
Curves were fitted to data from Angus cattle selected for high or low growth rate from birth to yearling. The data consisted of weight (n=284) and height (n=160) data of cows from birth to weaning of their calf as a 4-year-old, and weight, height, le
Publikováno v:
Livestock Production Science. 49:305-312
Correlated responses in calf weight and size traits resulting from 17 years (1974–1991) of divergent selection for yearling growth rate in an Angus beef cattle experiment were evaluated. Deviations of two divergent selection lines (High line and Lo