Year: 2003
Type: dissertation
Abstract: The manifestation of the autosomal mutant Callipyge gene in sheep is not thoroughly understood.The effects of hormonal leptin seem to have similar effects on fat tissue as is seen in the callipyge animals.To test the hypothesis that leptin is responsible for the decreased fat deposition in callipyge animals, blood samples were collected from 10 normal type and 10 callipyge ewes in late gestation.The samples were tested using a multi-species RIA for semm leptin levels.Mean semm concentrations of leptin did not differ significantly (P>0.49) between callipyge (2.53 ng/ml) and normal (2.38 ng/ml) phenotypes (Figure 2).The standard deviation for callipyge leptin was nearly twice (0.598 vs. 0.308) that of normal leptin values.These data indicate that if leptin does in fact have an effect on tissue distribution in callipyge animals, it is not during this time of late gestation.Further testing is necessary to determine if there are hormonal effects that result in the unique callipyge muscling pattern.in
Author: S. Schweers
Language: English
Subfield: Genetics
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2275988772