褐毛和牛

Heritability estimates were calculated for the total type score and its all components, based on both of intra sire daughter dam and half sib relationships, in Japanese Brown cattle. The data including 375 daughter dam pairs sired by 10 different bulls were taken from the files of Japanese Brown Cattle Society. Following estimates were obtained by intra sire regression of daughter on dam method : 0.35 for total score, 0.27 for head and face, 0.43 for neck, 0.07 for shoulders, 0.19 for chest, 0.15 for ribs and barrel, 0.14 for back and loin, 0.07 for hips, 0.06 for rump, 0.02 for thurls, 0.02 for buttock and tail, 0.31 for thighs, 0.18 for mammary system and sexual organs, 0.36 for legs and feet, 0.20 for hair and hide, 0.08 for body capacity and symmetrical balance, 0.09 for disposition and quality, and 0.19 for walk. Estimates based on paternal half sib correlation method were : 0.09 for total score, 0.42 for head and face, 0.08 for neck, 0.16 for shoulders, non for chest, 0.10 for ribs and barrel, 0.15 for back and loin, 0.18 for hips, 0.34 for rump, 0.10 for thurls, 0.10 for buttock and tail, 0.24 for thighs, non for mammary system and sexual organs, 0.02 for legs and feet, 0.04 for hair and hide, 0.48 for body .capacity and symmetrical balance, 0.06 for disposition and quality, and non for walk. The inconsistences of the f gures among the components between two methods were discussed, however no satisfactory conclusion was obtained.