Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
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Glycoalkaloids Content influenced by Tuber Parts and Storage Period in Major Potato Cultivars of Korea

감자 주요 품종의 괴경 부위, 저장기간별 글리코알칼로이드(glycoalkaloid) 함량

  • Kim, Yul-Ho (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Kim, Guem Hee (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Ji, Hye Rim (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Lee, Yu-Young (National Institute of Crop Science, RDA) ;
  • Park, Hyang-Mi (National Institute of Crop Science, RDA) ;
  • Kwon, Oh-Keun (National Institute of Horticultural & Herbal Science, RDA) ;
  • Kim, Su Jeong (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Sohn, Whang-Bae (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Jin, Yong-Ik (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Hong, Su-Young (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Nam, Jeong-Hwan (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Kweon, Kibum (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Suh, Jong-Taek (Highland Agriculture Research Center, National Institute of Crop Science, RDA) ;
  • Jeong, Jin-Cheol (Highland Agriculture Research Center, National Institute of Crop Science, RDA)
  • 김율호 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 김금희 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 지혜림 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 이유영 (농촌진흥청 국립식량과학원) ;
  • 박향미 (농촌진흥청 국립식량과학원) ;
  • 권오근 (농촌진흥청 국립원예특작과학원) ;
  • 김수정 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 손황배 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 진용익 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 홍수영 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 남정환 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 권기범 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 서종택 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 정진철 (농촌진흥청 국립식량과학원 고령지농업연구센터)
  • Received : 2014.07.18
  • Accepted : 2014.08.15
  • Published : 2014.09.30
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Abstract

Potato glycoalkaloids (PGAs) are potentially toxic to humans at high levels, and current safety regulations have recommended that PGAs content in tubers of potato cultivars should not exceed 20 mg/100gFW. Accordingly, it is important to determine the PGAs composition and level on potato cultivars for food safety and the breeding for new cultivars with low levels of PGAs. The main aim of this study was to evaluate ${\alpha}$-chaconine, ${\alpha}$-solanine, and total PGAs content in the peel and cortex portions in four recent cultivars ('Haryoung', 'Goun', 'Hongyoung' and 'Jayoung'), released by Highland Agriculture Research Center, together with 'Superior' and 'Atlantic'. The total PGAs ranged from 16.5 to 47.7 mg/100gFW. The ${\alpha}$-solanine/${\alpha}$-chaconine ratio was 1:3.2 ('Jayoung'), 1:3.5 ('Hongyoung') and 1:2 ('Superior'), whereas ${\alpha}$-solanine was not detected in 'Goun', 'Atlantic' and 'Hongyoung' under the analytical condition of this experiment. 75-94% of total PGAs was existed in the peel part of all cultivars. We selected two cultivars ('Atlantic' and 'Goun') showing lower PGAs content in the cortex part. During storage at $4^{\circ}C$, total PGAs content fluctuated widely in early stage of storage and stabilized gradually over time in 'Hongyoung', 'Superior' and 'Jayoung'. Thus, through the selection of cultivars and storage conditions, these results will provide consumers and breeders with fundamental information about the content of PGAs in Korea major cultivars.

PGA 함량 정보가 없는 유전자원을 활용한 다양한 용도의 감자 품종 개발은 괴경 내 PGA 함량을 높이는 비의도적 결과를 초래할 가능성이 있다. 이러한 배경에서 신품종에 대한 정밀한 PGA 함량 분석은 감자의 식품안전성 제고와 PGA 저함유 품종 개발을 위한 교배 모부본 확보차원에서 중요하다. 본 연구에서는 도입품종인 대서, 수미와 최근 개발된 하령, 고운, 홍영, 자영 4품종을 대상으로 괴경 부위, 저장기간별 PGA 함량변화를 분석하였다. 그 연구 결과를 요약하면 다음과 같다. 1. 총 PGA 함량(mg/100gFW)은 수미(47.7), 하령(46.2), 자영(45.7), 홍영(21.2), 대서(19.7), 고운(16.5) 순으로 많았다. 2. ${\alpha}$-solanine/${\alpha}$-chaconine 비율은 1:3.2(자영), 1:3.5(하령), 1:2(수미)이였으며, PGA 함량이 낮은 고운, 대서, 홍영 3품종에서는 모두 본 실험의 기기분석 조건 하에서는 ${\alpha}$-solanine이 검출되지 않았다 3. 공시품종의 껍질부위 PGA 함량은 전체 함량의 75-94% 분포를 보였으며, 이중에서 대서는 PGA 함량이 껍질(94%)에서 높고 육질 부위의 함량(1.2 mg)이 낮아 PGA 독성으로부터 가장 안전한 품종인 것으로 평가되었다. 4. 고운, 대서, 홍영 등 PGA 함량이 낮은 품종들은 저장기간 동안 PGA 함량의 변화가 거의 없었으나 하령, 수미, 자영 등 PGA 함량이 높은 품종들은 저장기간 동안 심한 변동을 보였다.

Keywords

Acknowledgement

Grant : 식용감자 glycoalkaloid의 괴경 내 축적관련 요인 분석

Supported by : 농촌진흥청

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