Microplate법에 의한 수박 라이코핀 고함유 유전자원 선발

다국어 초록 (Multilingual Abstract)

Recent researches focused on breeding lycopene-rich watermelon varieties are active since lycopene content in watermelon is 60% higher than in tomato. We developed a new microplate method using a UV spectrophotometer to select genetic resources of watermelon containing high lycopene content. The microplate method showed more accurate analysis (about 97% positive correlation) than HPTLC, suggesting the microplate method is a reliable analytical technique for the rapid and simple selection of watermelon resources. Lycopene contents of 96 watermelon accessions using the new microplate method was a wide variation of 3.2-98.3 ㎍.g-1FW to assess, allowing selection of 15 high-lycopene watermelon accessions. Lycopene contents of the 15 watermelon accessions was 4.4∼9.6 fold higher than lycopene content of a commercial cultivar ‘Speedplus’. These results suggest that the watermelon accessions selected using a novel microplate method can be used for breeding of lycopene-rich cultivars.

국문 초록 (Abstract)

수박은 토마토에 비하여 라이코핀 함량이 60% 높으며, 라이코핀 고함유 수박 품종개발에 관심이 집중되고 있다. 그러나 라이코핀 함량 분석을 위한 대량 분석 체계가 마련되지 않아 고함유 유전자원의 선발에 어려움이 있었다. 따라서 본 연구에서는 신속하고 간편한 lycopene 함량 분석기술의 개발과, 개발된 기술(microplate법)을 이용하여 라이코핀 고함유 유전자원을 선발하고자 하였다. 그 결과 UV spectrophotometer를 이용한 방법을 개선하여 Microplate법을 개발하였다. Microplate법은 HPTLC를 이용한 방법과 약 97%로 높은 정의 상관을 나타내어 분석의 정확성이 높은 방법임을 확인하였다. 따라서 Microplate법을 이용하여 수박 유전자원, 계통 및 96점을 대상으로 수박 과실의 라이코핀 함량을 분석한 결과 라이코핀 함량이 생체중 1 g 당 3.2∼98.3 μg·g-1의 넓은 변이를 보였다. 선발 유전자원은 시판 대비품종(스피드플러스; 10.3 μg·g-1 FW)에 비하여 4.4∼9.6배 높은 수준이었다. 선발된 자원들은 라이코핀 고함량 품종개발에 이용 될 수 있을 것으로 판단되었다.

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