• Horticultural Science & Technology
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• v.35 no.3
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• pp.333-343
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• 2017

Bloomless cucumber fruits are commercially produced by grafting onto the pumpkin stocks (Cucurbita moschata) to restricted silicon ($SiO_2$) absorption. Inhibition of silicon absorption in bloomless stocks is conferred by a mutant allele of the CmLsi1 homologous to Lsi1 in rice. In this study, we characterized the Lsi1 homologs in pumpkin (C. moschata) and its cold-tolerant wild relative C. ficifolia ('Heukjong') in order to develop a DNA marker for selecting a bloomless trait and to establish the molecular basis for breeding bloomless stock cultivars of C. ficifolia. A Cleaved amplified polymorphic sequence (CAPS) marker (CM1-CAPS) was designed based on a non-sysnonymous single nucleotide polymorphism (SNP, C>T) of the CmLsi1 mutant-type allele, and its applicability for Marker-assisted selection (MAS) was confirmed by evaluating three bloom and five bloomless pumpkin stock cultivars. Quantitative RT-PCR of the CmLsi1 for these stock cultivers implied that expression level of the CmLsi1 gene does not appear to be associated with the bloom/bloomless trait and may differ depending on plant species and tissues. A full length cDNA of the Lsi1 homolog [named CfLsi1($B^+$)] of 'Heukjong' (C. ficifolia), was cloned and sequence comparison between CmLsi1($B^+$) and CfLsi1($B^+$) revealed that there exists total 24 SNPs, of which three were non-synonymous. Phylogenetic analysis of CfLsi1($B^+$) and Lsi1 homologs further revealed that CfLsi1($B^+$) is closesly related to Nodulin 26-like intrinsic proteins (NIPs) and most similar to CpNIP1 of C. pepo than C. moschata.

• Research in Plant Disease
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• v.14 no.3
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• pp.153-158
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• 2008

This study was conducted to develop a easy seedling method to test large amounts of barley and wheat cultivars for resistance of powdery mildew. In addition, we also examined the resistance of genetic resources that have been used in barley and wheat breeding programs in Korea. This seedling test used paper bag with seeds can be completed within three weeks. to-day seedlings were available to inoculation and 8 days was needed for result reading. This method can test at least 180 collections at one time. we can identify the two resistant types by leave symptoms showed non infection and necrotic spots. Among the 79 Korean barley cultivars, only two cultivar, 'Sangrokbori' and 'Dajinbori' were resistant and 'Jejubori' showed moderate resistant. There was no resistant in hulless barley and wheat cultivars. It was same results in comparison of earlier resistant reports in field test. We confirm that this method could using in test of powdery mildew resistance in barley and wheat. Among the 1,401 genetic resources using in Korean breeding program, malting barley has more resistant collections comparing to 796 hulled and hulless barley and 273 wheat germplasms.

• Korean Journal of Plant Resources
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• v.26 no.5
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• pp.548-556
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• 2013

The objective of this study was to determine the effect of antioxidant enzyme activity and radical scavenging activities of cucumber grown greenhouse. The analytic method of antioxidant activities were measured by estimating DPPH free radical scavenging, nitrite scavenging ability activity and ABTS radical scavenging ability. The DPPH free radical scavenging activity of Jangjukcheongjang was the highest in most of the growth stage. The Nitrite scavenging ability at pH 1.2 was more than 40% in all cultivars and growth stages. The ABTS radical scavenging ability of Jangjukcheongjang and Nulpureuncheongjang showed relatively little higher than Janghyeongnakhap and Sinjoeunbaekdadagi. The SOD activity showed higher activity than 95% in all cultivars and growth stages. The activity of CAT was highest in the Nulpureuncheongjang of 2 (12~16cm) growth stage, and the APX activity of Nulpureuncheongjang and Janghyeongnakhap showed a relatively high activity. The POX activity showed distinctly different trends depending on the growth stage, and that is, the activity at harvest stage was significantly reduced. These results suggest that the cucumber had the potent biological activities, and that in the future, the availability of cucumber will be increase in the field of high-value cosmetic and food products.

• Journal of Bio-Environment Control
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• v.21 no.3
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• pp.247-251
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• 2012

To suggest the basic data for exporting enlargement of sweet pepper (Capsicim annuum L.), this study compared plant growth and fruit setting characteristics among 8 cultivars of red line. At 23 weeks after planting, plant height was long in 'Debla', 'Cupra', 'Thialf', 'Viper' and 'Spider', and was shot in 'Scirocco', 'Ferrari', 'Special'. 'Debla' had a few nodes number and long internode length. For 23 weeks after planting, weekly increment of plant hight and number of developed node were many in 'Debla' and 'Cupra', were few in 'Special' and 'Ferrari'. Average fruits of over 200 g was harvested in 'Viper', 'Spider' and 'Debla', average fruits of range of 180~200 g was harvested in 'Special' and 'Thialf', and average fruits of range of 160~180 g was harvested in 'Scirocco' and 'Cupra'. Cultivars harvested heavy fruits except in 'Debla' was high in percentage of irregular fruit size. Number of fruit setting on plant was many in 'Cupra' and 'Ferarri', ripening first was many in 'Ferarri', 'Scirocco' and 'Viper'.

• The Korean Journal of Mycology
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• v.10 no.4
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• pp.181-185
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• 1982

Immature apple fruits of cultivars Fuji and Miller were completely resistant to Macrophoma sp. until 10 July. When inoculated on 31 July, apples became susceptible to this fungus, irrespective of cultivar. This fungus grew better on Fuji than Miller. Lesion enlargement on apple at $25^{\circ}C$ was remarkably pronounced relative to $20^{\circ}C$. In both cultivars, the amount of total soluble carbohydrates or reducing sugars in apple fruit flesh was gradually increased as apples became mature. The healthy apples of cultivar Fuji had a higher amount of carbohydrates than those of Miller. The infected apples contained more soluble carbohydrates in comparison to the healthy ones. In healthy apples, there were no consistent differences between Fuji and Miller in amount of total soluble amino acids. With increasing age of apples, the amount of soluble amino acids declined in the fruit flesh of both cultivars. Levels of carbohydrates and amino acids in apple fruits were discussed in association with the immature fruit resistance to Macrophoma sp.

• Journal of Korean Society of Forest Science
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• v.107 no.4
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• pp.422-427
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• 2018

This study was performed to determine quality characteristics of solar-dried persimmon for each cultivar. The physical and sensory characteristics of 4 cultivars of solar-dried persimmons (Gojongsi, Godongsi, Sangjudungsi, Koshuhyakume) were investigated. As a result, yield rate and firmness was highest in Koshuhyakume (29.5%, 9.62 N). Meanwhile, the soluble solid content (SSC) was the highest in Gojongsi ($27.3^{\circ}Brix$) and it has a significant difference between 4 cultivars (p<0.05). The water activity was range from 0.784 to 0.819 and Gojongsi (0.784) was significantly lower than others. The water contents value was the highest in Koshuhyakume (37.51%), while Sangjudungsi (35.32%) was the lowest. In case of Hunter's value, 'L', 'a' and 'b' were the highest in Sangjudungsi (34.56, 9.24, 17.07), whereas Koshuhyakume (29.17, 5.68, 13.59) has generally low value. In sensory evaluation, overall acceptability was the highest in Gojongsi and Godongsi (5.16), while Koshuhyakume (3.95) was the lowest. The results showed that the quality characteristics of dried persimmon manufactured by solar drying method have distinct difference according to cultivars.

• Research in Plant Disease
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• v.23 no.2
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• pp.168-176
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• 2017

Root-dipping inoculation method has been widely used to determine the resistance of watermelon to Fusarium oxysporum f. sp. niveum causing Fusarium wilt. Although this method leads to the precise results of plant disease responses, more rapid and efficient assay methods have been still required because the root-dipping inoculation method is labor-intensive and time-consuming. In this study, we established a simple and effective bioassay method based on the comparison of various inoculation methods and growth conditions. To develop the system, the occurrence of Fusarium wilt on four resistant and susceptible cultivars was investigated by four different inoculation methods, root-dipping, scalpel, tip and soil-drenching methods. Of these inoculation methods, scalpel method resulted in clear plant disease resistance responses with the simplicity. With the use of scalpel method, we also explored the disease development of the cultivars depending on inoculum concentration, growth stage of seedlings, and incubation temperature after inoculation. Furthermore, we found that the resistance degrees of 23 cultivars derived by scalpel inoculation method were similar to the results by root-dipping method established previously.

• Journal of The Korean Society of Grassland and Forage Science
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• v.35 no.2
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• pp.99-104
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• 2015

This study was conducted to evaluate on agronomic characteristics, dry matter (DM) and digestible dry matter (DDM) yields of summer sowing sorghum hybrids (Sorghum bicolor (L) Moench) at Seongju in Gyeongbuk from 2013 to 2014. The experiment was arranged in randomized complete block design with three replications. Sorghum hybrids were seeded $31^{st}$ of July, 2013 and 2014. Sorghum hybrids were harvested on $3^{rd}$ November, 2013 and $5^{th}$ November, 2014. The observed average heading date was October 5, 8 and 9 for Sordan79, Sprint and SX17 respectively. The DM yield of 'SX17', 'Sordan79', and 'Sprint' was 24.2, 23,9 and 23.4 ton/ha, respectively and DM yield of those were significantly higher (p<0.05) than other three cultivars in 2013. DM yield of 'SX17', 'Sprint' and 'Sordan79' was 20.8, 20.0 and 19.3 ton/ha, respectively and DM yield of those was significantly higher (p<0.05) than other three cultivars in 2014. The DDM yield of 'SX17', 'Sordan79', and 'Sprint' was also higher (p<0.05) than other three cultivars in 2013 and 2014. ADF content of sorghum hybrids was low, whereas DDM was high. The results of this study indicated that traditional sorghum-sudangrass hybrids ('SX17', 'Sordan79') and sudan grass-sudangrass hybrid ('Sprint') than late flowering sorghum-sudangrass hybrid ('PACF8350') and sorghum-sorghum hybrids ('SS405', 'Sugar grazer') would be recommended for DM and DDM yields in the southern Korea.

• Journal of Mushroom
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• v.21 no.3
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• pp.173-178
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• 2023

In this study, the characteristics and taste components of six different oyster mushroom cultivars (Gonji-7ho, Santari, Baekseon, Chunchu, Suhan, and Heuktari) were analyzed and compared. The Heuktari mushroom pileus had the lowest brightness index (32.8) and remained dark (brightness index: 30.5) even after blanching. The moisture content of the mushrooms was approximately 90%. The salinity and sugar contents were highest in Heuktari (5.7% and 7.1%, respectively). Gonji -7ho had the highest contraction rates, with a length contraction rate of 16.4% and thickness contraction rate of 23.9%. The total amino acid content was highest in Heuktari (537.8 mg/100 g), but the glutamine content contributing to umami taste was highest in Santari (59.4 mg/100 g) and the aspartic acid content was highest in Baekseon (33.1 mg/100 g). Among the 5?-nucleotide components, guanosine monophosphate, which enhances umami taste, was highest in Baekseon (0.7 mg/g). Baekseon was also calculated to have the highest umami taste concentration based on amino acid and nucleic acid contents (12.7 g/100 g). The results of this study serve as valuable basic data on the physicochemical characteristics of oyster mushroom cultivars grown in Korea.

• Korean Journal of Soil Science and Fertilizer
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• v.18 no.2
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• pp.208-214
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• 1985

An attempt to evaluate yield response and efficiency of N fertilizer was made with the data obtained from various rice cultivars during 1978 to 1983. 1. The optimum rate of N fertilizer for maximum yield varied from 13.9 to 28.0 kg/10a with rice varieties. 2. The cultivars with high optimum N levels were high in N content (straw) and N uptake (straw+grain) at harvesting stage, but low in production efficiency and use efficiency of N. 3. The yield increment at the optimum rates of N in comparison with no N application among the rice varieties were 29-101%. 4. The cultivars with hish yield increment at optimum rate were high in the N content (straw+grain), and production efficiency at harvesting stage.