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Relationship between Differential Expression of Estrogen Receptor and Follicle Stimulating Hormone Receptor Genes in Ovary and Heterosis of Egg Number Traits in Chickens

  • Wang, Hui (Department of Genetics and Breeding, College of Animal Science and Technology China Agricultural University) ;
  • Sun, Dongxiao (Department of Genetics and Breeding, College of Animal Science and Technology China Agricultural University) ;
  • Yu, Ying (Department of Genetics and Breeding, College of Animal Science and Technology China Agricultural University) ;
  • Wang, Dong (Department of Genetics and Breeding, College of Animal Science and Technology China Agricultural University) ;
  • Zhang, Yi (Department of Genetics and Breeding, College of Animal Science and Technology China Agricultural University) ;
  • Zhang, Yuan (Department of Genetics and Breeding, College of Animal Science and Technology China Agricultural University)
  • Received : 2007.03.15
  • Accepted : 2007.09.21
  • Published : 2008.03.01

Abstract

In order to understand the molecular mechanism of heterosis of reproduction traits in chickens, we used the quantitative real-time reverse transcriptional polymerase chain reaction (Quantitative real-time RT-PCR) technique to investigate the differential expression of estrogen receptor (ESR) and follicle stimulating hormone receptor (FSHR) genes in 32-week-old ovaries of inbred chickens and their hybrid offspring in $4{\times}4$ diallel crosses, which involved White Plymouth Rock (E), CAU Brown (D), Silkies (C) and White Leghorn (A). We found that there were significant differences in mRNA expression of ESR and FSHR genes not only between hybrids and their parental lines (p<0.01), but also among different crosses (p<0.01). Furthermore, positive correlations between differential expression of both ESR and FHSR in hybrids and heterosis percentages of 32-week-old and 42-week-old egg number traits were significant at p<0.05. Our results suggested that differential expression of ESR and FSHR genes in the ovaries of inbred chickens and their hybrids could play roles in the formation of heterosis of egg number traits to some extent.

Keywords

ESR;FHSR;Heterosis;Chicken;Gene Expression

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