• 한국식품저장유통학회지
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• 제30권5호
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• pp.770-784
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• 2023

Although most lemons are imported into Korea, their consumption is increasing. Development of domestic varieties of Jeramon and Minimon is currently underway in an effort to meet the increasing demand for fresh lemons. In this study, an analysis of the physicochemical characteristics of Jeramon and Minimon, including their flavor components and antioxidant properties, was conducted. The results revealed that these new varieties of Korean lemon can be regarded as good sources of antioxidants and phytochemicals. Compared to Sunkist, the most consumed lemon variety in Korea, Minimon contained more than twice as much β-cryptoxanthin, and the content of L-ascorbic acid was more than three-four-fold higher in both Minimon and Jeramon. In addition, results from measurement of DPPH and ABTS radical scavenging activities indicated that Jeramon extract exhibited the highest antioxidant activity. In the volatile profile analysis, the profiles of volatile components showed high similarity among the three lemon samples, and the composition ratio was largely dominated by terpenoids. A markedly higher ratio of d-limonene and thymol was detected in the Minimon variety compared with that in the other two varieties. Collectively, the findings from this study on Korean lemon varieties provide a basis as well as valuable guidance for breeding domestic lemon varieties.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.192-192
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• 2017

Direct-seeding cultivation of rice is increasing in Asia instead of transplanting system, because of its lower cost and operational simplicity. Low-temperature germinability (LTG) and anaerobic germinability (AG) are important characters for breeding of varieties for wide-spread adoption of direct-seeding cultivation in rice. This study was performed to characterize LTG and AG of seven rice varieties and identify varieties with strong germinability on both low-temperature and anaerobic conditions. The mean germination rate and germination vigor of seven varieties were 51.7% and 6.0 under low-temperature condition, respectively. Among these varieties, Cheongcheongjinmi and Hwanggeumnodeul had the highest germination rate of 80%, indicating that Cheongcheongjinmi and Hwanggeumnodeul have a good LTG. In anaerobic conditions, the germination rate and coleoptile length for all varieties were 47.6% and 3.2 cm, respectively. Of them, the highest germination rate and coleoptile length were observed in Subo and Hopum, respectively, suggesting that these two varieties are tolerant to anaerobic during germination stage. Molecular characterization by SDS-PAGE revealed that the protein patterns differed at 50 kDa, 40 kDa, and 22 kDa between low-temperature and anaerobic conditions. Varieties identified as good LTG or AG in this study may be used for developing new direct-seeding rice cultivars through pyramiding these traits in the breeding program.

• 한국작물학회지
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• 제47권
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• pp.200-215
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• 2002

There are some international standards and organization controling the quality characteristics of varieties and seeds such as UPOV, OECD, ISTA, AOSA. The National List system to check variety performance such as quality characteristics of plant varieties and seeds was established by each countries. The UPOV (International Union for the Protection of New varieties of Plant) regulates the requirement of plant variety protection that is distinctness (D), uniformity (U), stability (S) (here in after called DUS), Novelty and Denomination, and some quality characteristics are used to examine the requirement of plant variety protection by each crops. OECD (Organization for Economic Cooperation Development) seed scheme regulates the seed certification for seed trade between countries. ISTA (International Seed Testing Association) and AOSA(Association for Official Seed Analyst) regulates the seed analysis standard and methods. Most of the countries in Europe has the National List system, which check the value for cultivation and use(VCU), that is to say, variety performance such as yield, quality and stress to environment. All the seeds should be enlisted in the National List before sell the seed in their country. All the quality characteristics checked variety performance are for instance, amylose and amylopectin content in rice, molting quality, $\beta$-glucan, protein in barley, protein and sugar content in soybean, sugar and amylopectin content in corn etc. Conditions for the protection of new variety of plant are DUS. Quality characteristics may be the important characteristics and used to check DUS in crop by crop. It is very important to develop a new characteristics and establish standard method fur examine the VCU and DUS test for each crop.

• 한국자원식물학회지
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• 제1권1호
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• pp.72-79
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• 1988

This experiment was conducted to breed the Boxthorn varieties with resistance to Anthracnose, good quality and high yielding potential in 1984 to 1986(3 years).The character of "Yu seong 1" with resistance to Anthracnose and "Yu seong 2"with good quality and high yielding potential are fellows;1, The plant type of "Yu seong 1" was semi-elect type but became to electtype after 60C" rediation and yield was decreased because of the number of flowers.2. The yield of "Yu seong 2" was the highest of all varieties.3. The quality(Extract and Betain contents) of "Yu seong 2" was the best ofall varieties and visible character was good.The results of this experinent showed that "Yu seong 1" should be promisinglines in south area because of resistance Anthracnose and "Yu seong 2" should bepromising lines in north area.hracnose and "Yu seong 2" should bepromising lines in north area.orth area.

• Plant Resources
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• 제8권3호
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• pp.275-280
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• 2005

Tissue culture systems to optimize regeneration plant species of Ocimum spp were evaluated as a method to micropropagate individual plants and to better study their biology in vitro. Ocimum species were also evaluated for the production of natural plant products during and following the regeneration process. The primary goal of this project was to enhance the regeneration efficiency of basil. Several factors were examined using different Ocimum species and commercial varieties. The effect of cytokinin combination, activated charcoal, gelling agents, and different carbon sources were investigated. Anthocyanin callus spots were produced only in four varieties among six tested. 'Sweet Dani' showed the best results on anthocyanin accumulation, while 'African beauty', 'Tree basil' and 'Methylcinnamate' produced only a few spots. Shoot regeneration was only achieved from 'Sweet Dani' explants. As the activated charcoal concentration increased, callus formation rate decreased respectively compare to the controls for all varieties. There was a decrease in callus growth with increasing concentration of agar and phytagel.

• 대한음성학회:학술대회논문집
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• 대한음성학회 2000년도 7월 학술대회지
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• pp.353-363
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• 2000

The consonant system of English is relatively uniform throughout the English-speaking countries. Accents of English are mainly known to differ in terms of their vowel systems as well as in the phonetic realisations of vowel phonemes. The results of an acoustic study of vowel phonology of Japanese English, Singapore English and Indian English are presented, and an attempt is then made to compare the vowel phonology of these non-native varieties with that of Scottish English and RP. Various native varieties of English are thus shown to differ from each other in major ways, as much, perhaps, as the non-native varieties differ from the native varieties. Nevertheless, native speakers of English appear to be mutually intelligible to a degree that does not extend to non-native varieties. Obviously there are features that various native accents have in common which facilitate their mutual intelligibility, and these features are not shared by non-native accents. It is proposed that the foreign learner adopt certain core features of English in his pronunciation if he is to use English effectively as an international language. The common core that is significant in the communication process will be discussed. In conclusion, some pragmatic implications for the English language education in the new millennium will be articulated.

• 환경생물
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• 제23권4호
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• pp.328-334
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• 2005

Dinoflagellates were investigated from the coastal waters of Korea. The total 100 thecate dinoflagellates taxa, comprising of 93 species five varieties and two forms were identified, which were attributed to four orders nine families, 13 genera in Korean coastal waters. 22 species, two varieties and two forms were new to Korean waters. Ceratium arcticum, C. longirostrum, C. praelongum, C. tripos var. ponticum, Gonyaulax jollifei, G. pavillardii, Protoperidinium cassum cassum, P. conicum f. asamushi, P. depressum var. parallelum, P. elegans f. granulatum, P. globifera, P. incognitum, P. majus, P. mite, P. obtusum, P. pallidum daedalum, P. parvum, P. perplexum, P. pyriforme pyriforme, P. pyrum, P. sphaeroides, P. subsphericum, P. valgus, P. venustum, Diplopsalopsis orbicularis, Gotoius abei were new record species for Korea.

• 한국식물학회:학술대회논문집
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• 한국식물학회 1987년도 식물생명공학 심포지움 논문집 Proceedings of Symposia on Plant Biotechnology
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• pp.9-18
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• 1987

The plant breeding, a discipline of agricultural sciences, has greatly contributed to huan welfare in relieving food crisis by development of higher yielding, stronger resistant and better quality varieties. However, many conventional plant breeders, especially ones working for major crops, are facing exhaustion of useful genetic variability, which greatly limit the potentional of developing better cultivars. Therefore, the convectional plant breeders have been eagerly looking for new renovational methods in creating genetic varibility. It has been expected that biotechnology would provide the technique to create totally new genetic variability through gene transfer, chromosome manipulation and/or cell fusion. It is strongly suggested that very close interdisciplinary approaches between convectionla plant breeders and biotechnoligists is essentional for opening new era in developing better varieties.

• 한국작물학회지
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• 제50권3호
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• pp.151-155
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• 2005

1970년대 이후 육성된 우리나라 벼품종들에 대하여 벼흰잎마름병 레이스 K1, K2, K3 및 K3a에 대한 반응을 검토한 결과를 요약하면 다음과 같다. 1. 통일형인 51품종의 저항성 정도를 검정한 결과, 레이스 K1에 저항성 13품종, 레이스 K1과 K2에 저항성 9품종, 레이스 K1, K2, 및 K3에 저항성 1품종, 레이스 K1, K2, K3 및 K3a모두에 저항성을 보인 것은 14품종이었다. 2. 자포니카형인 158품종의 저항성 반응을 살펴 본 결과, 레이스 K1 저항성 31품종, 레이스 K1과 K2에 저항성 1품종, 레이스 K1, K2 및 K3에 저항성 28품종, 레이스 K1, K2, K3 및 K3a모두에 저항성 1품종이었다. 3. 레이스 K1, K2, K3 및 K3a에 저항성인 품종은 통일형 품종이 자포니카형 품종 보다 훨씬 많았다.

• 한국조경학회지
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• 제32권2호
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• pp.120-129
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• 2004

This study was carried out to develop new varieties with early maturing and large fruit size in the Korean native dogwood (Cornus kousa) for woody landscape plants from native sites or cultivated area. The results are obtained as follows; We selected strains with early maturing and large fruit. size from the habitats from 2000 to 2003. ‘SKK 2-1’ had 4.0cm of fruit size while 2.0 cm of native variety. In addition, ‘SKK 2-2’, ‘SKK 2-3’, ‘SKK 2-4’, and ‘SKK 2-5’ with large fruit and early maturing were preliminary selected from the habitats. In the preliminary selections, ‘SKK 2-1’ was finally selected as new early maturing variety with large fruits in 2003. New early maturing variety with large fruit size, C. kousa var. ‘SKK 2-1’ was selected from 200 plants of 5-year-old seedlings in C. kousa in 5-12 Nung wean ri Goo sung myun Yong In, Kyung gi do, Korea in 2000. Their fruits were colorized in September 18, 20∼25 days earlier than October 7 of native varieties. Its fruit diameter is larger than 4cm. Its fruit weight was 5 times as heavy as native cultivars grown in Korea. This useful characters were still inherited after grafting. However, characteristics of growth, leaf, flower, and flowering period were not different from those of native varieties. Therefore, it was very promising landscape woody plant, having large fruits in early fall season. The rooting rate of Korean dogwood was high by the IBA treatment. The optimum date for softwood cutting was on June 25 ∼ July 25 when the rooting rate was more than 80%. In addition. Korean dogwood was easily propagated by grafting. Therefore, new early maturing variety with large fruits, C. kousa var. ‘SKK 2-1’ is easily propagated by softwood cutting or grafting and then is a promising cultivar as a woody landscape plant.