The Expression of Genes Related to Egg Production in the Liver of Taiwan Country Chickens

  • Ding, S.T. (Department of Animal Science and Technology, National Taiwan University) ;
  • Ko, Y.H. (Department of Animal Science and Technology, National Taiwan University) ;
  • Ou, B.R. (Department of Animal Science and Biotechnology, Tunghai University) ;
  • Wang, P.H. (Department of Animal Science and Technology, National Taiwan University) ;
  • Chen, C.L. (Department of Animal Science and Biotechnology, Tunghai University) ;
  • Huang, M.C. (Department of Animal Science, National Chung Hsing University, ROC) ;
  • Lee, Y.P. (Department of Animal Science, National Chung Hsing University, ROC) ;
  • Lin, E.C. (Department of Animal Science and Technology, National Taiwan University) ;
  • Chen, C.F. (Department of Animal Science, National Chung Hsing University, ROC) ;
  • Lin, H.W. (Department of Animal Science and Technology, National Taiwan University) ;
  • Cheng, Winston Teng Kuei (Department of Animal Science and Technology, National Taiwan University)
  • Received : 2007.01.06
  • Accepted : 2007.04.26
  • Published : 2008.01.01


The purpose of this study was to detect expression of genes related to egg production in Taiwan Country chickens by suppression subtractive hybridization. Liver samples of mRNA extraction from two Taiwan Country chicken strains (L2 and B), originated from the same population but with very distinct egg production rates after long-term selection for egg and meat production respectively. Two-way subtraction was performed. The hepatic cDNA from the low egg production chickens (B) was subtracted from the hepatic cDNA from the high egg production strain (L2). The reversed subtraction (L2 from B) was also performed. The resulting differentially expressed gene fragments were cloned and sequenced. We sequenced 288 clones from the forward subtraction and 96 clones from the reverse subtraction. These genes were subjected to further screening to confirm the differential expression between the two genetic breeds of chickens. The apolipoprotein B (apoB) was expressed to a greater extent in the liver of the L2 than in the B line chickens. The 5-aminoimidazole- 4-carboxamide ribonucleotide formyltransferase/IMP cyclohydrolase (PURH) was expressed to a greater extent in the liver of the B than in the L2 strain chickens. We demonstrated that both apoB and PURH were more highly expressed in the liver than that in other tissues (muscle, ovary, and oviduct) in laying Taiwan Country chickens. Taken together, these data suggest that after the selection for egg production, expression of apoB and PURH genes were also changed. Whether the changed expression of these genes is directly related to egg production is not known, but these two genes may be useful markers for egg laying performance in Taiwan Country chickens.


Supported by : National Science Council


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