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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Horticultural Science and Technology
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Korean Society of Horticultural Science
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Introduction of Resistance to Phytophthora capsici into 'Chilseongcho', a Local Pepper Cultivar in Youngyang, Using Backcross Method
Kim, Byung-Soo ; Hwang, Hee-Suk ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 77~80
As part of a breeding program to incorporate the resistance of AC2258 and SCM334 to Phytophthora capsici in ‘Chilseongcho’, a local pepper variety grown in Youngyang, Gyeongbuk province, an evaluation of the resistance to P. capsici was conducted on generations
using artificial inoculation at the seedling stage. Disease-free plants were recovered even in the
generation and a few
lines remained uniformly disease-free. This retention of a high degree of resistance in a backcross program was seemingly attributable to the resistance-conferring genes in the resistance sources. As expected, the
plants appeared to recover almost all the horticultural characteristics of the recurrent parent, ‘Chilseongcho’.
Growth and Yield by the Training Methods in Summer Season Cultivation of Cucumber in Highlands
Lee, Jong-Nam ; Lee, Jeong-Tae ; Kweon, Hun-Joong ; Lee, Ung-Ho ; Kim, Won-Bae ; Shin, Kwan-Yong ; Ryu, Seung-Yeol ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 81~84
This experiment was carried out to determine the optimum training methods for summer culture of cucumber (Cucumis sativus L.) in highlands. Cucumber seedlings (cv. ‘Eunsungbaegdadagi’) were planted with 90
50 cm distance on June 9th. Three training methods were used: vertical string, lean-to and arch types. All lateral shoots of cucumber plants were removed, but without topping in vertical string type. In lean-to and arch types, the main stems were topped at 25th node, and all lateral shoots beneath 1st to 5th node were completely removed. Those from 6th to 25th node were also removed except 2nd node. Fresh and dry weights of cucumber plant were heaviest in arch type, followed by lean-to and vertical string type. Although leaf area index (LAI) of arch type was lower than that of lean-to type, the former type was more suitable for growth. Fruit number and yield per plant of arch type were 11.6 and 2,154 g, respectively, and those were lower than those of vertical string type. In the arch type, marketable yield was highest producing 102,694 kg/ha and working hour was lower by 33% than those of vertical string type.
Enhancement of Fruit Set by Using Bombus ignitus Smith and 4-CPA in Protected Cultivation of Beefsteak-Tomato
Lee, Eun-Mo ; Song, Nam-Hyun ; Cho, Il-Hwan ; Lee, Sang-Beom ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 85~89
Tomato (Lycopersicum esculentum L. cv. Momotaro) plants were grown under greenhouse to determine the promotion of the fruit set by using B. ignitus and 4-CPA. Foraging activities of B. ignitus on the flowers of tomato plants showed 4.2 seconds on flower and 7.6 seconds between flower and flower. The percentage of fruit set can be controlled by 4-CPA treatments and foraging B. ignitus much higher than the untreated control plot. Fruit number was increased by 4-CPA, but there were few normal mature seeds. Foraging B. ignitus produced healthy mature seeds and it had given rise to much more heavy fruits than the 4-CPA treatments. The best marketable fruits were increased by foraging B. ignitus. However, there were not significantly difference in the sugar content among the pollination methods.
Effect of Washing and Steam Sterilization of Perlite Medium on the Tomato Cultivation in the Recycling Hydroponic System
Lee, Sang-Woo ; Seo, Myeong-Whoon ; Lee, Su-Yeon ; Sim, Sang-Youn ; Lee, Seong-Jae ; Lee, Yong-Hwan ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 90~94
The purpose of this study was to establish an efficient reusing methods of perlite medium in the recycling hydroponic system. This experiment was carried out over three continuous cultivations of tomatoes from 1997 to 1998. Before cultivation, the reused medium was treated with : washing with water (WW), steam sterilization (SS), steam sterilization after washing (SSW), new perlite (NP), and non-treated reusing perlite (NRP). The results of cultivation showed that, in SSW treatment, the chlorophyll contents and the growth of ‘Momotaro T93’ tomato were greater than in other treatments. Marketable yield in SSW was increased by 19% as compared with that of NRP. Concentrations of inorganic elements in perlite medium were decreased by WW and SSW treatments, but concentrations of phosphate and calcium were unchanged. Concentration of total phenolics in the nutrient solution after cultivation in SSW was lower as compared with that in NRP. The phenolics were identified to be p-hydroxybenzonic acid, p-coumaric acid and ferulic acid by HPLC analysis. Futhermore, nutrients containing high concentration of phenolics inhibited germination of tomato seeds in petridishes. Therefore, the concentration of total phenolics may have affected on marketable yield of tomato in the recycled hydroponic system.
Differences in Plant Growth and Bulb Development as Affected by Storage Temperatures of Two Garlic (Allium sativum L.) Cultivars
Bae, Ro-Na ; Yun, Sang-Don ; An, Yul-Kyun ; Mok, Il-Gin ; Lim, Chai-Il ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 95~99
The study was carried out to investigate the effect of storage temperatures on the yield and qualities of two garlic cultivars; ‘Namhae’ (the southern ecotype) and ‘Danyang’ (the northern ecotype). These cultivars were stored at room temperature, -4
, and 35
. Yields and bulb diameters of both ecotypes were the highest when stored at room temperature, followed by 20
, and 0
. Regardless of storage temperatures, ‘Namhae’ always had higher yield and bulb diameter than those of ‘Danyang’. The plant height showed similar trends to yield and bulb diameter at all storage temperatures except 35
in ‘Namhae’. ‘Namhae’ showed smaller plant heights than those of ‘Danyang’. In both ecotypes, the highest number of leaves occurred when stored at room temperature. The concentration of pyruvic acid and fructan were the highest in the garlic bulbs when stored at room temperature. ‘Danyang’ showed higher pyruvic acid and fructan contents than those of ‘Namhae’, in general.
Screening of Breeding Resources for Processing Potato in Potato Germplasms Based on the Analysis of Specific Gravity and Glucose Content
Park, Young-Eun ; Cho, Hyun-Mook ; Yi, Jung-Yoon ; Kim, Sung-Yeul ; Lim, Hak-Tae ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 100~105
This experiment was carried out to evaluate the specific gravity and glucose content of potato germplasms and to identify varieties with high specific gravity and low glucose content for a total 282 varieties in 1997, 1998, 1999, and 2001. Highly significant correlations, for specific gravity and glucose content, by analysis of correlation coefficient were shown among those years. Therefore, these two characteristics are very useful as a selection index to improve breeding efficiency for processing potato in early generations. In this experiment, a group of 38 varieties including Daegwan 39, Katahdin, Konahubuki, and Darita, which showed specific gravity in excess of 1.080, was selected for starch processing, another group of a 170 varieties including Daegwan 22, Alamo, Hokkaigogane, and Spunta, was selected as having low glucose content of less than 0.25%. Also, a 18 varieties including 76C36-43, Atlantic, Pentland Dell, Record, and Waseshiro were selected as the group of both high specific gravity and low glucose content for chip and french fries.
Changes of Inorganic Elements in Senescing Fuyu Leaves at Two Locations Differing the Time of Abscission
Park, Soo-Jeong ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 106~109
Fuyu (Diospyros kaki) leaves were collected from mid-August to early December at Jinju (
N) and Jeju (
N) orchards. Leaves in Jinju abscised in early November after the first frost and in Jeju in early December. Comparison of seasonal changes in concentrations of inorganic elements of the abscised leaves from two locations were made. N in the leaves decreased from 2.31% to 1.77% at Jinju and from 2.41% to 0.48% at Jeju. K in the leaves decreased from 1.82% to 0.97% and from 2.24% to 1.33% at Jinju and Jeju, respectively. Although P in the leaves decreased from 0.10% to 0.09% in Jinju and from 0.10% to 0.07% in Jeju, the initial concentration and the amount lost during senescence were lower than those of N and K. Magnesium concentration of leaves from Jinju decreased from 0.53% to 0.39%, but this trend was not observed in the leaves from Jeju since mid-August. Calcium and manganese showed little change or increased a little during senescence. The difference in the time of leaf abscission between Jinju and Jeju resulted in a most significant difference in the magnitude of N remobilization in the leaves.
Effect of Different Degrees of Defoliation on Fruit Quality, Reserve Accumulation and Early Growth of Young Fuyu Persimmon
Park, Soo-Jeong ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 110~113
The study was conducted to find the effect of different degrees of defoliation on dry weight, fruit quality, and reserve accumulation with 3-year-old Fuyu trees grown in 30-L pots. Also, the impact of defoliation on the tree growth in the following year was studied. Leaves were 0, 50, and 100% defoliated on October 1, 1999. Different degrees of defoliation did not affect dry weight of roots, old woods and shoots measured on November 10 to the level of statistical significance. However, dry weights in perennial parts tended to decrease as percent defoliation increased. The fruits from 100% defoliated trees were smaller in size, less sweet and poorly colored than those from 0 and 50% defoliated trees. As percentages of defoliation increased, nonstructural carbohydrates tended to decrease in roots, old woods and shoots. The roots of 0% defoliated trees contained greater than 1.9-fold more soluble sugars, and 2.2-fold more starch than those of 100% defoliated trees. As percent defoliation increased, new shoot growth in the following year decreased. During the period of new growth in the following year, dry weight of root decreased by 33% to 63%.
Breeding of New Early Season Pear Variety 'Shincheon'
Hwang, Hae-Sung ; Sin, Il-Sheob ; Kim, Whee-Cheon ; Cho, Hyun-Mo ; Shin, Yong-Uk ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 114~119
‘Shincheon’ pear (Pyrus pyrifolia Nakai) originated from the cross between ‘Niitaka’ and ‘Chuwhangbae’ in 1988 was released by the National Horticultural Research Institute (NHRI) at Suwon. This variety was selected as a promising variety in 1996, and its regional adaptability test was carried out as Wonkyo Na-29 at 10 sites for three years from 1997 to 1999. In 1999, it was finally named as ‘Shincheon’. It showed high fruit quality ripening in mid-August. ‘Shincheon’ shows vigorous tree growth and upright growing habit, and is resistant to black spot disease caused by Alternaria kikuchiana. It blooms two days earlier than ‘Shinsui’ cultivar. The optimum harvest time is mid-August at Suwon, 45 days earlier than ‘Niitaka’. Fruit shape is oblate and skin color is attractive yellowish brown. Fruit weighs 357 g and has 13.2
soluble solids content. The flesh is soft, very juicy, and lightly gritty.
Effects of Growth Regulators and Temperature on the Growth of Pseudobulb in Bletilla striata
Yoon, Mi-Jeong ; Park, Ki-Bae ; Park, Chun-Ho ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 120~123
This experiment was conducted to clarify the interactive effect of plant growth regulators and temperatures on the growth of pseudobulb in Bletilla striata. The rate of sprouting increased by dipping Bletilla striata into BA 50 mg․
for 1 hour in back pseudobulb and by dipping into kinetin 50 mg․
for 30 minutes in lead pseudobulb. However, in case of BA 100 mg․
treatment, the growth rate of sprouting was strikingly decreased in back and lead pseudobulbs. Application of plant growth regulators was ineffective for improving sprouting under high temperatures. In this study, the practical propagation methods using back pseudobulbs in Bletilla striata were discussed.
Effects of Basal Media, Growth Regulators and Addition Agents on Callus Formation and Plant Regeneration for Anther Culture of Hemerocallis spp.
Ahn, Min-Sil ; Lim, Hoe-Chun ; Choi, So-Ra ; Choi, Dong-Chil ; Choi, Jeong-Sik ; Choi, Yeong-Geun ; Park, Yun-Jum ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 124~129
With the aim of introducing anther culture to Hemerocallis spp., effects of basal mediums, growth regulators and addition agents on callus formation and plant regeneration were studied. Highest callus formation rate and plant differentiation of both H. dumortieri and H. fulva var. kwanso were obtained when the medium was inoculated to the flower bud size of 0.51.0 cm in length. When B5 medium was used as basal medium, the callus and plantlet were hardly generated. But the callus formation and plant differentiation were observed in all treatments with MS medium. Among the treatments of growth regulators and varying degrees of concentration, highest callus formation and plantlet regeneration were observed in NAA 2.0＋BA 2.0 mg․
combination for H. dumortieri, and kinetin 1.0＋2.4-D 1.0 mg․
combination for H. fulva var. kwanso, respectively. Among temperature treatments, the callus formation was high for all species when treated at 35
for one day, but the plantlet regeneration was incomplete under the same condition. However, the plantlet regeneration was observed in all species when treated at 4
for four days. Addition of glutamine resulted in high callus formation in all the species, whereas charcoal addition resulted in lower callus formation in H. fulva var. kwanso than control. No response was observed in H. dumortieri.
Ecological Characteristics and Distributions of Korean Native Rhapontica uniflora at Habitats
Ahn, Young-Hee ; Choi, Kwang-Yool ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 2, 2002, Pages 130~137
The distribution of native Rhapontica uniflora and its ecological characteristic were investigated. Natural vegetative areas of Rhapontica uniflora were found at 10 places in Gangwondo province, three places in Chungcheongbukdo province, and two places in Gyeongsangbukdo province. These areas are mostly limestone areas in Korea. More than 40% of Rhapontica uniflora were grown in the rocky areas and 46.6% on the steep slope of the mountain 6180
, and about 97% of the total habitat of Rhapontica uniflora were grown in the sunny area. About 40% of total areas were faced toward southwest. The altitude of the naturally grown areas was 201300 m and 47% of it were grown at this level. In this habitat, 43 families, 88 genus and 104 species were identified. These were mostly Rhapontica uniflora, Artemisia iwayomogi, Artemisia capillaris, Pulsatilla koreana and Patrinia scabiosaefolia. In an average, more than 70% of Rhapontica uniflora belonged to rare class. Through the analysis of plant population, 24 species were found in Nammyun, Jungsungun, Gangwondo province, and total number of individual plant was 214. The Shannon-Weiner’s species diversity (H) was 1.252 with the maximum species diversity (
) of 1.380. Evenness (J) was 0.907, with Dominance (1J) 0.093. The pattern of space distribution for the individual group of Rhapontica uniflora in the naturally populated areas was 0.9385 in fraction for covariance when compared with the number of individual plant. Thus, Rhapontica uniflora could be identified as a randomly populated native plant with somewhat regularly distributed patterns.