Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Application of Color Index for Red Grapes (CIRG) for Assessment of Grape Quality

포도의 품질 평가를 위한 CIRG 값의 적용

  • Choi, Jae-Youn (Hwaseong City Agricultural Technology Center) ;
  • Cho, Eun-Kyung (Hwaseong City Agricultural Technology Center) ;
  • Park, Seo-Jun (Technology service Division, National Institute of Horticultural & Herbal Science) ;
  • Hur, Youn-Young (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS)) ;
  • Nam, Jong-Chul (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS)) ;
  • Koh, Sang-Wook (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS)) ;
  • Jung, Sung-Min (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS))
  • 최재연 (화성시농업기술센터) ;
  • 조은경 (화성시농업기술센터) ;
  • 박서준 (국립원예특작과학원 기술지원과) ;
  • 허윤영 (국립원예특작과학원 과수과) ;
  • 남종철 (국립원예특작과학원 과수과) ;
  • 고상욱 (국립원예특작과학원 과수과) ;
  • 정성민 (국립원예특작과학원 과수과)
  • Received : 2014.08.12
  • Accepted : 2014.09.11
  • Published : 2014.09.30
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Abstract

Hunter value ($L^*$, $a^*$, $b^*$) is a rapid and convenience method for compare with different skin color, but not suitable to compare quality with various grape cultivars. Color Index for Red Grapes (CIRG) is one of a simply convert method for grape skin color as numeric data, and many previously result showed that high correlation between CIRG index and various quality factors of grape. In this experiment, we measured CIRG index, total soluble solids (TSS), titratable acidity (TA), and total anthocyanin content on the grapes (Campbell Early, Heukbosuk, Kyoho) from the varaison to harvest. As a result, CIRG index and anthocyanin contents have an exponential correlation; r-square is each 0.8595 in the 'Campbell Early' and 0.8500 in 'Heukbosuk'. And TSS and CIRG index have a positive r-square, at the Campbell Early is 0.7758 and Heukbosuk is 0.7253. Also TA and CIRG index have a positive r-square, at the Campbell Early is 0.7279 and Heukbosuk is 0.6630. These results were shown that CIRG index is a reliable indicator for a none-destructive evaluation of the grape quality.

과피색의 경우 정량적인 지표로서 주로 Hunter $L^*a^*b^*$값을 이용하나 이 값으로 과피색, 과실의 품질을 간접적으로 확인하기에는 어려운 점이 있다. 따라서 본 실험에서는 포도 착색지수로서 제안된 CIRG(Color Index for Red Grapes) 값의 활용도를 평가하여 포도 착색의 객관적인 평가지수로서의 가능성을 검증하고자 하였다. 이를 위해 포도가 착색이 시작되는 시기부터 과립을 채취하여 과피색과 당도, 산도 등의 품질 인자를 측정하여, CIRG 값과의 상관을 분석하고 회귀식을 도출하였다. CIRG 값과 안토시아닌 함량은 CIRG 값이 증가함에 따라 안토시아닌 함량은 지수적으로 증가함을 알 수 있었으며, 결정계수는 '캠벌얼리'와 '흑보석' 모두 0.8500 였다. CIRG 값과 당도는 '캠벌얼리'가 0.7758, '흑보석'이 0.7253으로 높은 결정계수를 나타냈으며, 산도 또한 각각 0.7279, 0.663으로 비교적 높은 결정계수 값을 나타내었다. 따라서 적색포도를 대상으로는 CIRG값이 Hunter $L^*a^*b^*$값에 비해 과실품질을 추정하는데 있어 보다 높은 신뢰성을 가지고 있는 것을 확인하였다.

Keywords

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