Ranking of Sire Breeds and Beef Cross Breeding of Dairy and Beef Cows

摘要

Data from Grange Beef Research Centre in Ireland (Keane, More O'Ferrall and Connolly,1989; More O'Ferrall and Keane, 1990; Keane et al., 1990; Keane and More O'Ferrall, 1992;Keane, 1994; Keane and Allen, 2002) and from the United Kingdom (UK) Meat andLivestock Commission (MLC) (Southgate, Cook and Kempster, 1988; Kempster, Cook andSouthgate, 1988) were used to compile a ranking for common production traits of progeny ofstraight-bred Holstein-Friesians (HF) and crosses out of HF cows and the common beefbreeds. In the Grange studies, the animals were reared as steers to around two years of ageand serially slaughtered. The MLC animals were also reared as steers in 16- or 24-monthproduction systems and were slaughtered at an estimated constant proportion of subcutaneousfat.