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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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Nuclear Genotype for Cytoplasmic Male Sterility of BC5 Selections Developed for Incorporation of Resistance to Phytophthora capsici into 'Chilseongcho', a Land Race of Pepper in Youngyang
Hwang, Hee-Suk ; Kim, Byeong-Dong ; Kim, Byeong-Su ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 209~212
The nuclear genotype for the cytoplasmic male sterility of BC5 selections of crosses between ‘Chilseongcho’, a land race of Youngyang, Gyeongbuk province with a maintainer genotype (Nrfrf), and two sources of resistance to Phytophthora capsici, AC2258 and SCM334, carrying a restorer genotype (NRfRf), was identified by crossing with a male sterile tester. With the Chilseongcho
AC2258 cross, 6 out of the 15 selected
plants were identified as fixed to maintainers (Nrfrf), while the rest were either heterozygous or unstable. With the Chilseongcho
SCM334 cross, 6 out of the 17 plants selected from the
population were identified as maintainers (Nrfrf), while the remainder were either heterozygous or unstable. The progeny of the maintainers are in the process of fixation by further selection.
Protection of Tomato Plants by the Products of Glutathione S-Transferase(GST) Gene from Cotton (Gossypium hirsutum L.)
Kang, Won-Hee ; Kim, Jong-Hwa ; Kim, Il-Seop ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 213~216
Glutathione S-transferase (GST) cDNA from cotton plant was cloned and expressed in Escherichia coli. The expressed GST enzyme conjugated reduced glutathione with 1-chloro-2,4-dinitrobenzene (CDNB), which had the cytotoxicity to prokaryotic and eukaryotic cells. Expressed GST had about two-fold glutathione peroxidase and about 40-fold GST specific activity. Cytotoxicity of CDNB was detoxicified by the products of cotton GST cDNA on tomato plants. This result can provide the possibility of cloning plant gene, expressing the functional product of plant gene in microbe, protecting horticultural plants from toxic chemicals by the gene products, and using this gene to improve the tolerance to herbicide by overexpressing in horticultural plants.
Effect of Training an Extra Shoot on Growth and Yield of Sweet Pepper (Capsicum annuum 'Jubilee' and 'Fiesta')
An, Chul-Geon ; Gang, Dal-Soon ; Rho, Chi-Woong ; Kang, Ho-Sung ; Jeong, Byoung-Ryong ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 217~220
The study was carried out to investigate the effect of training an extra shoot during mid-growth stage on the growth and yield of red (Capsicum annuum ‘Jubilee’) and yellow (Capsicum annuum ‘Fiesta’) sweet peppers. Seeds were sown on July 28, seedlings were transplanted on September 2, and fruits were harvested from early December in 2000 to early July in 2001. An extra shoot was trained at the 22nd-23rd node during mid-growth stage in February and March, 2001. Regardless of cultivar, plant height and fruit size decreased by training an extra shoot during mid-growth stage. Fruit weight in this treatment also decreased by about 5 g, while number of marketable fruits increased by about five fruits per plant as compared to those in the control which had only two stems trained per plant. When an extra shoot was trained in February and March, fruit yield increased remarkably starting from April and May. As a result, yield of late fruits increased by 25% in ‘Jubilee’ and 16% in ‘Fiesta’, and total marketable yield increased by 11-15% as compared to that of the control.
Effectiveness of Growth Regulators on Height Control of Cabbage Plug Seedlings
Park, Yong-Bong ; Ko, Soon-Bo ; Moon, Jung-Soo ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 221~224
The objective of this study was to examine the effect of growth retardants, hexaconazole and diniconazole, fungicide on the possibility of height control and good rasing of cabbage seedlings. Hexaconazole 5 mg․
treatment had no difference in the growth of above-ground when compared with the control. The higher the concentration, the greater the effect of restriction. However, diniconazole treatments reduced the growth more than the control. In the case of dwarfing cabbage seedlings, diniconazole treatment decreased the leaves of cabbage seedlings more than hexaconazole. Especially, diniconazole over 100 mg․
treatment showed extreme dwarfing and the seedling became unhealthy. Leaf length and leaf width were increased a little with hexaconazole and diniconazole treatments 30 days after nursing. This implies that the effect of dwarfing was temporary. This dwarfing shock occurred because adequate temperature applied enhanced rapid formation of new leaves after transplanting. A rate of rooting after transplanting the control plot showed 92.5%. In the case of 500 mg․
concentration of hexaconazole and diniconazole, all remaining treatments showed 95% of rooting. Considering these results, triazole, a fungicide showed effect of height control and raising seedlings during the nursing of cabbage.
Correlation Analysis among Quality Attributes for Practical Harvest Indices of Nectarine Fruits
Park, Youn-Moon ; Kim, Jong-Ju ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 225~229
Consumer preference for quality attributes of nectarine fruit was surveyed, and sensory evaluations were performed on texture-based taste. Based on the survey and organoleptic panel test, major quality attributes at harvest were investigated in mid-season cultivar, ‘Cheonhong’ and late-season cultivar, ‘Subong’ nectarines. Fruits were harvested twice around commercial maturity for fresh market at five-day intervals and relationships of fruit weight and ground color with flavor attributes were analyzed to find out optimum, non-destructive harvest indices. No significant relationship was observed between juice acidity and other quality factors. Correlation between fruit weight and soluble solid content (SSC) was only significant in late-harvested ‘Subong’ nectarines. Ground Hunter ‘a’ values, in contrast, showed relatively high correlations with SSC. Especially, when pooled data of early- and late-harvested fruits were analyzed, the coefficients were highly significant at P=0.01 in ‘Cheonhong’ and significant at P=0.05 in ‘Subong’ cultivar. Considering consumers’ acceptance for sweetness, ground color could be a non-destructive and reliable harvest indicator for fresh market. Studies of flesh firmness and sensory evaluation suggested an idea that flesh firmness can be maintained at proper levels by applying adequate postharvest technology. Thus, high quality nectarines could be harvested on the basis of ground color-SSC correlation avoiding severe deterioration of fruit texture and marketing loss.
Seedling Growth and Carbohydrate Distribution in Persimmon (Diospyros kaki L.) as Affected by Restricting Main Root Growth
Kim, Sung-Chul ; Choi, Seong-Tae ; Park, Doo-Sang ; Kang, Seong-Mo ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 230~233
This study aimed to establish a system to encourage the development of lateral and fibrous roots of persimmon seedlings by restricting the growth of main roots in the nursery. Before seeding, a layer of non-woven fabric was installed at the depths of 15, 20 and 30 cm from soil surface. No installation of the material served as the control. The main roots stopped growing at 15 or 20 cm when the fabric was installed at that depth. The main root grew about 28 cm in a year, so that no growth restriction was observed in control and the 30 cm trees. Despite the apparent difference in their lengths, the dry weights of the main roots, ranging from 12.5 to 15.6 g per seedling, were not statistically different among the treatments. Lateral roots developed better as main root growth was restrictied. Dry weight of the laterals was 1.5 g per seedling when the fabric was installed at 15 cm depth; this was three times of that at 30 cm depth. Restricting the growth of main roots did not affect the development of fibrous roots so much as the lateral roots. Total root dry weight of a seedling was very similar in all the treatments, being in the range from 15.0 to 18.8 g. Restriction of main root growth affected little on top growth, and thus the top to root ratio of the seedlings. Concentrations of soluble sugars and starch in the roots and top parts of the seedlings differed little in all treatments. It was concluded that restricting the growth of main roots by installing the fabric at 15 to 20 cm depth could be of practical value in producing nursery stocks of persimmon with a better development of root system.
Effect of Heating by Warm Water Circulation in Heat Storage Water Bag on Growth and Fruit Quality of Plastic House-grown Peaches
Lim, Sang-Cheol ; Kim, Seon-Kyu ; Kim, Young-Ho ; Youn, Cheol-Ku ; Lee, Byoung-Ae ; Youn, Tae ; Lee, Cheol-Hee ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 234~237
Effect of heating method on tree growth, fruit quality, and yield of ‘Baekmijosaeng’ and ‘Kurakatawase’ peaches was investigated. Also an economic analysis to obtain basic data for forcing culture system was carried out. Minimum air temperature in heating treatment by electro-boiler-generated warm water circulation in water filled heat storage bags was 1.2 and 11.4
higher than respective heating by oil-boiler and field control. Minimum soil temperature in heating by electro-boiler-generated warm water circulation in water filled heat storage bags was 0.9 and 15.4
higher than respective heating by electro-boiler and field control. Fruit maturation period was not affected by type of boiler, but heating treatments hastened the maturity by 38 to 40 days in ‘Baekmijosaeng’ and 35 days in ‘Kurakatawase’. Fruit quality was slightly improved in heating treatment compared with open field. Tree vigor was not significantly affected by heating treatments. Income index for heating by electro-boiler compared with field control was 439%, and that by oil-boiler was 417%.
Breeding of Early Summer Pear Cultivar 'Minibae'
Cho, Hyeon-Mo ; Cho, Kwang-Sik ; Kang, Sam-Seok ; Koh, Gab-Cheon ; Hong, Kyung-Hy ; Kim, Whee-Cheon ; Kim, Ki-Youl ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 238~241
‘Minibae’ originated from the cross between ‘Danbae’
‘Kosui’ in 1982 at Naju Pear Research Institute was initially selected in 1990 and named in 1996. The tree shows vigorous growth and is an upright-spreading type. It has shown high level of field resistance to black leaf spot (Alternaria kikuchiana). It carries rich pollen grains. Harvesting time is Aug. 5, 7 days earlier than that of ‘Shinsui’. The fruit shape is round, and skin color is yellowish brown similar to ‘Shinsui’. Fruit weighs about 240 g, slightly less than ‘Shinsui’ and has 10.5 oBx soluble solid content. The flesh is soft and juicy like ‘Shinsui’. It has negligible amount of grit. Shelf-life is short under the room temperature and thus it would be preferable to market soon after harvest or handle through the cold chain system.
Effect of Cutting Time and Dipping Treatment of Auxins on Rooting of Styrax japonica Cuttings
Lee, Jong-Suk ; Hong, Jeong ; Lee, Jae-Jun ; Chang, Yeun-Kyung ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 242~245
The object of this study was to determine the optimum cutting time and effects of IAA, IBA, and NAA on rooting of Styrax japonica cuttings. Hardwood cuttings cut on 19 April rooted rarely, but softwood cuttings cut on 11 May rooted easily with IAA, IBA, and NAA dipping treatments. Softwood cuttings treated with IAA and IBA increased rooting percentage and number of roots compared to control. In softwood cuttings treated with IBA 1,000 mg․L-1, rooting percentage was the highest, and the number of roots increased markedly with IBA application. Callus formation and roots developed at the same time in softwood cuttings with IBA and IAA treatments. Correlation between callus formation and rooting appeared in softwood cuttings.
RAPD-mediated Determination of Genetic Relatedness in Oriental Lilies
Kim, Sun-Ki ; An, Byung-Joon ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 246~251
Twenty-two oriental lily cultivars were analyzed to determine their genetic relatedness using random amplified polymorphic DNA (RAPD) markers. Among twenty 10-mer random primers (OP B type), 6 primers were selected to amplify 39 polymorphic markers, which were useful for the identification of the cultivars and used to make a dendrogram of genetic relatedness among the cultivars. At the Squared Euclidean Distance (SED) level of 20, the cultivars were clustered as 4 groups. When RAPD markers of parents and progenies of their hybridizations, ‘Casa Blanca’×‘Evelina’, ‘Marco Polo’
‘Kyoto’, and ‘Kyoto’
‘Casa Blanca’, were analyzed using primer OPB 5, 8, and 14, it was found that 5-D and 14-D markers of ‘Kyoto’ and 8-B of ‘Evelina’, and 14-C of ‘Casa Blanca’ were inherited to their progenies. Therefore, the 39 RAPD markers amplified by the 6 primers are useful for the identification and classification of oriental lily cultivars as well as for the tracing the parentages of the hybrids in the oriental lily group.
New Varieties with Thornless Branches of Crataegus pinnatifida Bunge
Kang, Ho-Chul ; Shim, Kyung-Ku ; Ha, Yoo-Mi ; Lee, Won-Han ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 3, 2002, Pages 252~256
The study was carried out to select new varieties with thornless branches of Crataegus pinnatifida and to investigate their morphological characteristics as a woody landscape plant. Thornless strains were collected at both Chuncheon, Kangwon Province and Suwon, Kyunggi Province. Selected thornless strains were named as ‘SKK 5’, ‘SKK 6’, and ‘SKK 1’. Growth and leaf characteristics of selected strains were not different from those of native variety. ‘SKK 1’, ‘SKK 5’, and ‘SKK 6’ had more flowers per cluster than native variety. However, their inflorescence length were shorter than that of native variety. The other morphological characteristics and flowering period were not different from those of native variety. Thornless character was also inherited after grafting. Therefore, the new thornless strains, ‘SKK 1’, ‘SKK 5’, and ‘SKK 6’ were found to be promising woody landscape plant.