Author:
BAILEY C. B.,LAWSON J. E.,MEARS G. J.
Abstract
Angus and Hereford bull calves were obtained from lines of cattle selected for 18 yr for rapid post-weaning gain on high-energy or low-energy diets. After weaning they were given a common diet consisting of 70% barley-based concentrate and 30% roughage. Bulls whose ancestors were selected on the high-energy diet had lower levels of cholesterol and albumin in the blood than bulls whose ancestors were selected on the low-energy diet. Blood insulin, growth hormone and energy substrates were not affected by differences in the nature of the selection diets and this accords with absence of effect of selection diet on rate, efficiency or composition of gain. The significance of the selection effects on cholesterol and albumin levels in blood is unknown. Key words: Angus, Hereford, bulls, blood, composition, selection
Publisher
Canadian Science Publishing
Subject
Animal Science and Zoology,Food Animals
Cited by
2 articles.
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