The Correlation and Comparison of Quality Characters of Several Tomato Cultivars Grown by Hydroponics

수경재배한 토마토의 품종별 품질특성 비교 및 품질특성간 상관관계

  • Received : 2010.03.17
  • Accepted : 2010.05.07
  • Published : 2010.06.30

Abstract

This study was conducted to compare the quality characters of 15 different tomato cultivars ('Dotearang Dia', 'Super Dotearang', 'Super sunroad', 'Hoyong', 'Mirokku', 'Baccuhs', 'Mascara', 'Poseidon', 'Radido', 'Madison', 'Rapsodie', 'Solomon', 'Amaral', 'Picasso', 'Tymaxx') and find out the correlation among the quality characters in order to get basic informations for exporting tomato. The $a^*/b^*$ value of fruit surface showed from 2.8 to 4.8, but there was no significant difference in fruit surface color value, such as $a^*$, $b^*$ and $a^*/b^*$ among the cultivars. The respiration and ethylene production rate also were not shown any significantly difference among cultivars. The firmness of fruit was higher in 'Picasso', 'Tymaxx' and 'Madison' cultivars. The contents of soluble solids was higher in 'Hoyong' and 'Dotearang Dia' cultivars. The vitamin C content was higher in 'Super Sunroad' and 'Dotearang Dia' cultivars. The titratable acidity was higher in 'Hoyong' cultivars. The sugar/acid ratio that depended on soluble contents was lower in 'Amaral', 'Picasso', 'Tymaxx' cultivars that showed lower soluble contents. Conclusionally, The firmness that was one of the most important quality character in exporting tomato was higher in European cultivars, but soluble solide and vitamin C content were higher in Japanese cultivars. The significant correlation coefficient values were determined (more than p = 0.05) between $a^*/b^*$ and other quality characters. The results suggested that surface color was the most suitable character represented tomato qualities. The high coefficient value (r = 0801) between $a^*/b^*$ and the contents of soluble solids. The firmness and the contents of soluble solids that is the most important factor for exporting showed significant negative correlation (r = -0.611).

본 연구는 국내에서 주로 생산되고 있는 대과종 토마토 품종의 품질을 비교 조사하여, 토마토의 원활한 유통 및 수출을 위한 수확후 관리 분야의 연구의 기초 자료를 얻고자 수행되었다. 과피색은 품종별 일정한 경향 없이 $a^*/b^*$ 값은 2.8에서 4.8범위 안에 있었다. 호흡률과 에틸렌 발생률도 품종간 큰 차이를 보이지는 않았다. 내적 품질 중 경도는 'Picasso', 'Tymaxx', 'Madison'에서 가장 높았다. 당도의 경우 대체로 $6^{\circ}Brix$ 수준을 나타내었는데 'Hoyong'과 'Dotearang Dia'가 높았다. 비타민 C 함량은 'Super Sunroad'와 'Dotearang Dia'가 가장 높았다. 산도는 품종별 큰 차이 없이 'Hoyong'이 가장 높았으며, 이 때문에 당산비는 당도와 유사한 양상으로 유럽계 중 당도가 낮았던 'Amaral', 'Picasso', 'Tymaxx'에서 낮았다. 이상의 결과로 보면 수출 토마토에서 중요한 품질 요인인 경도는 유럽계가 당도와 비타민 C 함량은 동양계가 높았다. 품질 요인간 상관관계는 $a^*/b^*$ 값으로 표시한 과피색이 여러 품질 요인과 높은 상관관계를 나타내었는데, 특히 당도와 가장 높은 상관계수(r = 0.801)를 나타내었다. 또한 수출현장에서 중요하게 다루는 경도와 당도는 부의 상관관계(r = -0.601)를 나타내었다.

Keywords

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