Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Comparisons of Meat Quality Characteristics between Castration and Non-castration from Dairy Goats

거세 및 비거세 유산양고기의 품질특성 비교

  • Kang, Geunho (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Cho, Soohyun (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Seong, Pilnam (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Kang, Sunmun (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Park, Kyoungmi (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Park, Beomyoung (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration) ;
  • Kim, Donghun (Animal Products Research and Development Division, National Institute of Animal Science, Rural Development Administration)
  • 강근호 (농촌진흥청 국립축산과학원 축산물이용과) ;
  • 조수현 (농촌진흥청 국립축산과학원 축산물이용과) ;
  • 성필남 (농촌진흥청 국립축산과학원 축산물이용과) ;
  • 강선문 (농촌진흥청 국립축산과학원 축산물이용과) ;
  • 박경미 (농촌진흥청 국립축산과학원 축산물이용과) ;
  • 박범영 (농촌진흥청 국립축산과학원 축산물이용과) ;
  • 김동훈 (농촌진흥청 국립축산과학원 축산물이용과)
  • Received : 2012.10.29
  • Accepted : 2013.02.05
  • Published : 2013.02.28
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Abstract

This study was conducted to investigate meat quality and sensory characteristics between castrated and non-castrated dairy goats. Dairy goat of Saanen breeds was slaughtered at an age of 6 mon. Then, characteristics of dairy goat meat were analyzed to chemical compositions, collagen content, pH, meat color, cooking loss, water-holding capacity, shear force, protein solubility, and myofibrillar protein fractions by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Also, odor from dairy goat meats was analyzed by sensory evaluation and volatile substances by gas chromatography-mass spectrometry (GC-MS). As a result, the chemical compositions and physicochemical characteristics were not significantly different between castrated and non-castrated dairy goats meat. Also, there is no difference protein solubility (sarcoplasmic, myofibrillar and total protein) and protein fraction by SDS-PAGE. Sensory evaluation results in odour scores are highly (p<0.05) non-castration dairy goat meat better than castration. As a result, overall palatability was higher (p<0.05) in castrated goat meat when compared with non-castrated one. The indole and octadecanoic acid by GC-MS based on sensory evaluation results were only detected in non-castrated dairy goat meat. Therefore, distribution for goat meats castrated compared to non-castrated dairy goat meat is expected to be able to get a good response to the Korean consumer.

본 연구는 거세 및 비거세 유산양고기의 육질특성 및 관능적 특성을 알아보고자 수행하였다. 본 시험에 공시된 유산양은 자넨 품종으로 총 6개월간 사육된 거세 10두, 비거세 10두에서 등심근을 채취하여 육질분석 시료로 이용하였다. 유산양고기의 품질특성 조사를 위해 일반성분, 콜라겐 함량, pH, 육색, 가열감량, 보수력, 전단력, 단백질 용해성 및 SDS-PAGE에 의한 근원섬유 단백질 분포를 측정하였다. 또한, 거세 유무에 따른 이취물질 조사를 위해 관능평가 및 GC-MS에 의한 휘발성 물질을 분석하였다. 그 결과, 화학적 조성 및 이화학적 특성에 있어서는 거세유무에 따른 유의적인 차이가 없는 것으로 나타났다. 또한, SDS-PAGE에 의한 근원섬유 단백질 분포도에 있어서도 처리구간 주요 단백질인 마이오신(200 kDa)과 액틴(45 kDa)의 양상에 있어서 뚜렷한 차이가 없는 것으로 나타났다. 관능평가 결과에 있어서는 비거세 유산양고기에서 이취항목의 점수가 높게 평가되어 전체적인 기호성에 있어서 부정적인 것으로 나타났다. 이러한 관능평가 결과를 토대로 GC-MS를 이용하여 휘발성 물질을 조사한 결과, 비거세 유산양고기에서만 인돌, 옥타데카에노익산 등의 물질이 검출되었다. 따라서, 향후 국내에서 사육하고 있는 유산양수컷고기의 유통을 위해서는 거세를 실시하는 것이 소비자에게 좋은 호응을 얻을 수 있을 것으로 사료된다.

Keywords

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