Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Postnatal Expression of Growth/Differentiation Factor-8 (GDF-8) Gene in European and Asian Pigs

  • Lin, C.S. (Department of Biological Science and Technology, National Chiao Tung University) ;
  • Wu, Y.C. (Department of Animal Science, National Chung-Hsing University) ;
  • Sun, Y.L. (Division of Biotechnology, Animal Technology Institute Taiwan) ;
  • Huang, M.C. (Department of Biological Science and Technology, National Chiao Tung University)
  • Received : 2002.02.15
  • Accepted : 2002.05.13
  • Published : 2002.09.01
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Abstract

Myostatin (growth differentiation factor (GDF)-8), is one member of the transforming growth factor $\beta$ superfamily. Investigations of GDF-8 null mice and double-muscled cattle revealed that GDF-8 has a profound influence upon skeletal muscle growth. Therefore, the GDF-8 effect upon the productive performance of pigs is worth exploring. In the present study, the nucleotide sequences and expression levels of GDF-8 genes in European pigs (Landrace and Duroc) and Asian pigs (Taoyuan and Small-ear) were evaluated. Based upon their genetic background these breeds possess significantly distinct growth rate and muscle productionphenotypes. Our sequence data showed that the nucleotide sequences of European and Asian pigs were 100% similar. Postnatal expression of GDF-8 gene in skeletal muscles, from birth to 12 mo of age, among different breeds was measured. GDF-8 expression levels in the longissimus muscle of neonatal European breed littermates were the highest, however it declined significantly (p<0.05) at 1 and 3 mo, and then increased gradually at 6 to 12 mo. The Asian breeds, however, GDF-8 expression level increased markedly at 3 mo and maintained a constant level thereafter. The results indicate that rather than polymorphism within the GDF-8 functional sequence between European and Asia breeds, it was relative to the gene regulation in postnatal muscle growth.

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References

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