Polymorphism of the ovocalyxin-32 gene and its association with egg production traits in the chicken

Y. Uemoto, C. Suzuki, S. Sato, S. Sato, T. Ohtake, O. Sasaki, H. Takahashi, E. Kobayashi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We performed candidate gene analysis to identify SNP in the chicken ovocalyxin-32 (OCX-32) gene in the F2 resource population, to develop a PCR-RFLP method for genotyping and to evaluate the associations of the gene polymorphism with egg production traits. The F2 resource population-comprising 272 chickens-was obtained by crossing White Leghorn (WL) males and Rhode Island Red (RIR) females. They were measured for egg production traits and used for candidate gene analysis. Among parental individuals of the F2 population, 2 novel nonsynonymous polymorphisms (c.267T>G and c.494A>C) and 1 known non-synonymous polymorphism (c.381G>C) in the coding sequences of the chicken OCX-32 gene were detected. The PCR-RFLP method was used for screening the chickens of the F2 population. In parental populations, genotype c.267T>G and c.494A>C were segregated within WL and RIR breeds, respectively, but genotype c.381G>C was breed-specific SNP between WL and RIR breeds. A total of 4 haplotypes were constructed based on the 3 SNP in parental populations, and there was no recombination between c.267T>G and c.494A>C. There was a significant association (P < 0.05) between the OCX-32 gene SNP and egg production traits, but there was no significant association between the hap-lotypes of the OCX-32 gene and egg production traits in the F2 population. In the present study, there was the most significant association between c.381G>C of the OCX-32 gene and rate of egg production. The current study is the first step to confirm the relationship between OCX-32 gene polymorphisms and egg production traits.

Original languageEnglish
Pages (from-to)2512-2517
Number of pages6
JournalPoultry Science
Issue number12
Publication statusPublished - 2009 Dec


  • Candidate gene analysis
  • Chicken
  • Egg production trait
  • Ovocalyxin-32 gene


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