Why are young broiler chickens fatter than layer-strain chicks?
1. The abdominal fat pads of 5 week-old broiler and layer chicks incorporated 6.0 and 3.9% of intravenously-injected 14C-labelled very low density lipoproteins respectively. 2. These proportions of total plasma lipoprotein flux were sufficient to account for about 65-70% of the rate of fat deposition in broilers, but were more than 4-fold greater than that the rate of fat deposition in layers. 3. [14C]Palmitate taken up into adipose tissue of layer chicks had a t1/2 of 2-3 days. 4. There was no significant turnover of adipose tissue triglycerides in broilers and this appears to be a major reason for their relative fatness.
Department of Cellular and Molecular Biology, AFRC Institute of Animal Physiology and Genetics Research, Roslin, Midlothian, U.K.
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Griffin
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Windsor
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Goddard
D000273:Adipose Tissue; D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000033:anatomy & histology*; D005260:Female; D006133:Growth Substances / Q000097:blood; D008071:Lipoprotein Lipase / Q000378:metabolism; D008074:Lipoproteins / Q000097:blood; D013045:Species Specificity; D014280:Triglycerides / Q000378:metabolism
D006133:Growth Substances; D008074:Lipoproteins; D014280:Triglycerides; D008071:Lipoprotein Lipase