• Title/Summary/Keyword: 식미

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Varietal and Locational Variation of Grain Quality Components of Rice Produced n Middle and Southern Plain Areas in Korea (중ㆍ남부 평야지산 발 형태 및 이화학적 특성의 품종 및 산지간 변이)

  • Choi, Hae-Chune;Chi, Jeong-Hyun;Lee, Chong-Seob;Kim, Young-Bae;Cho, Soo-Yeon
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.39 no.1
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    • pp.15-26
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    • 1994

  • To understand the relative contribution of varietal and environmental variation on various grain quality components in rice, grain appearance, milling recovery, several physicochemical properties of rice grain and texture or palatability of cooked rice for milled rice materials of seven cultivars(five japonica & two Tongil-type), produced at six locations of the middle and southern plain area of Korea in 1989, were evaluated and analyzed the obtained data. Highly significant varietal variations were detected in all grain quality components of the rice materials and marked locational variations with about 14-54% portion of total variation were recognized in grain appearance, milling recovery, alkali digestibility, protein content, K /Mg ratio, gelatinization temperature, breakdown and setback viscosities. Variations of variety x location interaction were especially large in overall palatability score of cooked rice and consistency or set- back viscosities of amylograph. Tongil-type cultivars showed poor marketing quality, lower milling recovery, slightly lower alkali digestibility and amylose content, a little higher protein content and K /Mg ratio, relatively higher peak, breakdown and consistency viscosities, significantly lower setback viscosity, and more undesirable palatability of cooked rice compared with japonica rices. The japonica rice varieties possessing good palatability of cooked rice were slightly low in protein content and a little high in K /Mg ratio and stickiness /hardness ratio of cooked rice. Rice 1000-kernel weight was significantly heavier in rice materials produced in Iri lowland compared with other locations. Milling recovery from rough to brown rice and ripening quality were lowest in Milyang late-planted rice while highest in Iri lowland and Gyehwa reclaimed-land rice. Amylose content of milled rice was about 1% lower in Gyehwa rice compared with other locations. Protein content of polished rice was about 1% lower in rice materials of middle plain area than those of southern plain regions. K/Mg ratio of milled rice was lowest in Iri rice while highest in Milyang rice. Alkali digestibility was highest in Milyang rice while lowest in Honam plain rice, but the temperature of gelatinization initiation of rice flour in amylograph was lowest in Suwon and Iri rices while highest in Milyang rice. Breakdown viscosity was lowest in Milyang rice and next lower in Ichon lowland rice while highest in Gyehwa and Iri rices, and setback viscosity was the contrary tendency. The stickiness/hardness ratio of cooked rice was slightly lower in southern-plain rices than in middle-plain ones, and the palatability of cooked rice was best in Namyang reclaimed-land rice and next better with the order of Suwon$\geq$Iri$\geq$Ichon$\geq$Gyehwa$\geq$Milyang rices. The rice materials can be classified genotypically into two ecotypes of japonica and Tongil-type rice groups, and environmentally into three regions of Milyang, middle and Honam lowland by the distribution on the plane of 1st and 2nd principal components contracted from eleven grain quality properties closely associated with palatability of cooked rice by principal component analysis.

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떫은감 장아찌 가공적품종 선발에 관한 연구

  • 추연대;박석희
    • Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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    • 2003.10a
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    • pp.161.2-162
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    • 2003

  • 감 장아찌 가공적성이 높은 떫은감품종을 선발키위해 연구한 결과 시험처리전 떫은감 과실특성으로 과중은 갑주백목, 상주둥시 품종이 무거웠고 당도는 고종시, 청도반시 품종이 높았다. 장아찌 경도는 침지후 14일까지 저하되었다가 그 이후 증가되었으며 품종별 증가되는 비율은 사곡시가 다소높았다. 장아찌염도는 침지후 14일까지는 많이 증가되었으나 그이후 염도변화는 적었으며 품종별로는 고종시가 가장 낮았다. 염장중 탈삽정도는 침지초기(14일후)에 대부분 품종들은 탈삽지수가 3이하로 떫은맛을 느낄수가 없었으며 떫은감 품종중 도근조생과 사곡시품종이 다른 품종에 비해 탈삽정도가 양호하였다. 떫은감 품종별 물성검사 결과 경도가 높은 품종은 도근조생과 고종시였고 낮은 품종은 월하시와 청도반시였다. Adhesiveness에서는 고종시와 청도반시에서 높았고 사곡시와 상주둥시에서 낮았다. Springiness에서는 대부분의 품종에서 비슷하였으나 청도반시와 사곡시 품종에서 다소 높았다. 고종시와 상주둥시 품종에서 Gumminess와 Chewiness가 높았다. 떫은감 품종별 관능검사결과 상주둥시, 월하시, 고종시, 도근조생, 사곡시등의 품종이 식미지수가 2.4이상으로 우수하였으나 상주둥시, 월하시, 고종시 등의 품종은 씨를 함유하기 때문에 장아찌 가공에 부적합하였고 도근조생, 사곡시등의 품종은 식미지수가 3.1, 3.0으로 우수할 뿐만 아니라 씨가 없어 장아찌가공에 적합한 품종이었다.

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