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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2000;13(1): 1-5.
DOI: https://doi.org/10.5713/ajas.2000.1    Published online January 1, 2000.
Genetic and Environmental Effects on Carcass Traits of Japanese Brown Cattle
T. D. Sri Rachma Aprilita Bugiwati, H. Harada, R. Fukuhara
Studies on the genetic and environmental effects on M.longissimus thoracis area (MLTA), fat thickness (SFT), rib thickness (RT) and marbling score (MS) were conducted on 21,086 steers and 7,151 heifers of Japanese Brown breed. All carcass traits were affected significantly (p<0.01) by sire, sex and initial year effects. Both of the MLTA and MS of steers were greater than heifers. Their differences were 1.4 cm2 for MLTA and 0.05 for MS, respectively. Cattle started for fattening in winter tend to have higher of MLTA and MS and thicker of SFT and RT than those in other seasons. MLTA increase from 1987 to 1989 (about 1.9 cm2) and decrease until 1994 (about 2.4 cm2) and then increase again up to 1995 (about 1.5 cm2). MS were nearly equal from 1987 to 1991 (about
Keywords: Japanese Brown Cattle; Carcass Traits; Genetic Parameters

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