Plasma insulin, metabolite concentrations, and carcass characteristics of Japanese Black, Japanese Brown, and Holstein steers.

摘要: To characterize some of the physiological features Japanese beef breeds, plasma concentrations insulin and metabolites carcass composition were measured in five Black, Brown, four Holstein steers (6.2 mo; 164 kg). The raised under typical feeding conditions Japan until they slaughtered at 600 to 700 kg BW. Blood samples collected 8 mo age (average BW, 194 kg) 300, 400, 500, Plasma increased with BW all three breeds greater (P < .05) Blacks than Browns or Holsteins 400 exhibited lower glucose levels compared Holsteins. Regardless breed, urea nitrogen (PUN) two had PUN 300 Total cholesterol phospholipid tended decrease above Holsteins; however, both elevated 500 .05). Breed did not affect albumin, triglycerides, NEFA. higher .01) dressing percentage, fat proportion, a proportion bone These results indicate that there are breed differences certain among Holstein.