Type

Journal Article

Authors

Patrick J. Caffrey
Aidan P Moloney
R. Neilan
Michael G. Keane
Mark McGee

Subjects

Veterinary

Topics
holstein friesian dairy cattle cattle breed dairy production weight gain live weight genetic merit carcass traits

Production and carcass traits of high dairy genetic merit Holstein, standard dairy genetic merit Friesian and Charolais × Holstein-Friesian male cattle (2005)

Abstract The increased proportion of Holstein genetic material in the dairy herd has consequencesfor beef production in Ireland. A total of 72 spring-born male calves (24 Holsteins (HO), 24 Friesian (FR) and 24 Charolais × Holstein-Friesians (CH)) were reared from calfhood to slaughter. Calves were artificially reared indoors and spenttheir first summer at pasture following which they were assigned, on a breed basis, to a factorial combination of two production systems (intensive 19-month bull beef andextensive 25-month steer beef) and two slaughter weights (560 and 650 kg). Afterslaughter the pistola hind quarter was separated into fat, bone and muscle.Live-weight gain, carcass gain, kill-out proportion, carcass conformation and carcassfat scores were 830, 811 and 859 (s.e. 14.9) g/day, 540, 533, 585 (s.e. 7.7) g/day, 526, 538 and 561 (s.e. 3.0) g/kg, 1.51, 2.18 and 2.96 (s.e. 0.085), and 3.40, 4.25 and 4.06 (s.e. 0.104) for HO, FR and CH, respectively. Corresponding values for pistola weight as a proportion of carcass weight, pistola muscle proportion and pistola fat proportion were 458, 459 and 461 (s.e. 2.6) g/kg, 657, 645 and 667 (s.e. 3.7) g/kg, and 132, 161 and 145 (s.e. 4.1) g/kg. Compared with the intensive system, animals on the extensive system had a lower (P < 0.001) daily live-weight gain, kill-out proportion and a lower muscle proportion in the pistola. Increasing slaughter weight increased (P < 0.001) carcass weight and carcass fat score and reduced the proportion of muscle in the pistola.Allometric regression coefficients for pistola weight on side weight, and totalbone, muscle and fat weights on pistola weight were 0.898, 0.755, 0.900 and 1.910respectively. It is concluded that HO grew at least as fast as FR but had a lower killoutproportion. Carcass conformation and fat scores were greater for FR than for HOand muscle proportion in the pistola was lower and total fat proportion was higher.Compared with FR, CH had heavier carcasses, a higher kill-out proportion and less fatand more muscle in the pistola.
Collections Ireland -> Teagasc -> Animal & Bioscience
Ireland -> Teagasc -> IJAFR, volume 44, 2005
Ireland -> Teagasc -> Animal & Grassland Research & Innovation Programme
Ireland -> Teagasc -> Irish Journal of Agricultural & Food Research

Full list of authors on original publication

Patrick J. Caffrey, Aidan P Moloney, R. Neilan, Michael G. Keane, Mark McGee

Experts in our system

1
Patrick J. Caffrey
Teagasc
Total Publications: 16
 
2
A P Moloney
Teagasc
Total Publications: 101
 
3
Michael G. Keane
Teagasc
Total Publications: 50
 
4
Mark McGee
Teagasc
Total Publications: 81