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The Association between A-FABP Promoter Genotype and Carcass Traits in Pigs

비육돈의 도체형질과 A-FABP Promoter 유전자형의 연관 분석

  • Published : 2007.09.30

Abstract

The association between the promoter region genotypes of the porcine adipocyte fatty acid binding protein (A-FABP) gene and carcass traits in commercial pigs was examined. Interestingly, only two different genotypes (-406T/T and T/C) for the A-FABP gene were detected using Hinf-RFLP for the substitution mutation T-406C in the A-FABP promoter in commercial pigs, and no -406C/C homozygotes were detected. The reason for the lack of the -406 C/C genotype is due to the breeding system in which only Duroc, which has a high frequency of -406C/- in this locus among the three breeds involved in commercial pig production, is typically used as a terminal sire. The pigs containing the genotype -406C/- were significantly associated with an increase in intramuscula. fat content and carcass weight (p<0.05), but there was no association with the other carcass traits tested (fat composition, color score, texture score, moisture, and separation score between muscles). This study suggests that the -406C/- genotype of the porcine A-FABP gene may not only be a useful molecular marker for intramuscular fat, but may also contribute to the improvement of meat quality by the production of well-marbled pigs by breeding animals containing this genotype, especially Duroc, as a terminal sire for commercial pigs.

본 연구는 비육돈에서 지방세포지방산결합단백질(A-FABP) 유전자의 유전자형과 도체형질의 상관관계를 조사하였다. 유전자 A-FABP의 프로모터 영역에 대해 HinfI-RFLP를 이용하여 유전자형을 조사한 결과 두 가지 유전자형(-406T/T T/C)들이 발견되었고 C/C는 발견되지 않았다. 유전자형 중 -406C/C 동형접합자가 발견되지 않는 이유는 비육돈 생산에 관여하는 돼지 품종들 중에서 Duroc 품종만이 이 유전자에 대한 고도의 다형성을 나타내기 때문으로 추정되었다. 유전자형 -406C/-를 나타내는 돼지들은 근내지방과 도체중이 통계적으로 유의적인 증가함을 나타내었으나 (p<0.05), 그 외의 도체형질들(조지방, 육색, 조직감, 수분 삼출도, 근육분리도)은 유의한 차이를 나타내지 않았다 (p>0.05). 본 연구를 통해 돼지 A-FABP 유전자의 -406C/- 유전자형이 근내지방에 대한 유용한 분자 마커가 될 수 있을 뿐만 아니라 다형성이 비육돈의 근내지방에 대한 유용한 분자 마커가 될 수 있으며, 특히 Duroc 품종을 최종 종모돈으로 이용할 경우 이 유전자형을 보유한 돼지를 이용하는 분자육종체계에서 marbling이 잘 된 돼지의 생산을 통한 육질 개선에 기여할 것으로 사료된다.

Keywords

References

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