• Title/Summary/Keyword: Jeollanamdo

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Breeding of New Rose Cultivar 'Haedoji' with Red Color Flower, Resistance to the Powderly Mildew and High Productivity (흰가루병에 강하고 다수성인 장미 적색 품종 '해도지' 육성)

  • Gi, Gwang-Yeon;Hwang, In-Tack;Cho, Kyung-Chul;Na, Taek-Sang;Kim, Joung-Keun;Lee, Ya Song;Shin, Hae-Ryoung;Choi, Kyong-Ju;Lee, Jae-Sin;Han, Tae-Ho
    • Korean Journal of Breeding Science
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    • v.40 no.2
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    • pp.164-167
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    • 2008

  • A rose cultivar "Haedoji" developed at the Jeollanamdo Agricultural Research and Extention Services (JARES) is a standard type with deep Red flower. From 2000, two cultivars 'Vital' and 'Cardinal' were examined for horticultural characteristics and were included in cross-combination in 2003. Cultivar 'Vital', a vigorous standard type, first preference with red flower, was used as a mother plant and cultivar 'Cardinal', a red flower standard type with light color, was used as a pollen-donor plant. seventeen six breeding lines were selected in 2004 based on flower shape, flower color and abundance of petal numbers on the first selection. two breeding lines were selected in 2004 based on powderly mildew and vigor on the second selection. For three years, from 2005 till 2007, one breeding lines were selected and examined for their productivity, and then cultivar "Haedoji" was developed because of distinctive characters such as light red color flower, upright stem, long vase-life and Resistance to the Powderly Mildew. A standard type with intermediate sized flower, cultivar "Haedoji" shows in average 9.2 cm flower diameter, 62.0 cm flower stem length, and 9.5 days vase-life. The average productivity for three years was $167.3stems{\cdot}m^{-2}$ per year and increased 2% compare to cultivar 'Tiamo' with $163.9stems{\cdot}m^{-2}$ per year.

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Isolation of Compounds having Inhibitory Activity toward Tyrosinase from Receptaculum Nelumbinis (연방(蓮房)의 티로시나제 저해 활성을 보이는 성분분리)

  • Cho, Hyun Woo;Jung, Won Seok;An, Byeong Gwan;Cho, Jung Hee;Jung, Su Young
    • Korean Journal of Pharmacognosy
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    • v.44 no.1
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    • pp.1-5
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    • 2013

  • Nelnumbo nucifera Gaerth. (Nymphaeaceae) has been used in a korean traditional medicine to treat fever, sunstroke and dizziness. The receptaculums of this plant were refluxed with MeOH, and then fractionated with organic solvents ($CH_2Cl_2$, EtOAc and n-BuOH) to screen whitening activity using tyrosinase inhibitory activity. EtOAc ($IC_{50}$, 45.23 ${\mu}g/ml$) fractions showed a good tyrosinase inhibitory activity. Column chromatographic separation of $CH_2Cl_2$ and EtOAc fractions of Receptaculum nelumbinis led to the isolation 3 compounds. Their chemical structures were characterized as ${\beta}$-sitosterol (1), quercetin 3-O-${\beta}$-D-galactopyranoside (2) and kaempferol 3-O-${\beta}$-D-glucopyranoside (3) by comparison NMR spectral data and with those in references, respectively. Isolated compounds 1 and 3 were firstly isolated from Receptaculums nelumbinis. Compounds 2 and 3 showed potent whitening activities.

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Fruit Quality, Antioxidant Capacity and Nutrients between Organic and Conventional kiwifruit in Korea

  • Cho, H.;Cho, J.;Cho, Y.;Park, J.
    • Korean Journal of Organic Agriculture
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    • v.19 no.spc
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    • pp.225-229
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    • 2011

  • Organic kiwifruits were smaller fruit size but had higher magnesium and dry matter content than conventional, meanwhile, fruit soluble solid content was similar to conventional. There were no significant difference in polyphenol contents and antioxidative capacity between organic and conventional although there were considerable variations among sample orchards. Several minerals were also similar levels in both systems.

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Current practices and economic performances of organic kiwifruit production in comparison with conventional one in Korea

  • Cho, Y.;Cho, H.;Park, M.;Ma, K.
    • Korean Journal of Organic Agriculture
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    • v.19 no.spc
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    • pp.199-202
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    • 2011

  • Organic production practices varied among producers. Generally, organic producers were relying on imported input materials such as organic compost and liquid fertilizer even more than conventional producers. Very few organic farmers had composting facilities or sites for the own supply of compost in need. The productivity of organic kiwifruit orchard (92%) was not as low as that of conventional while the net income (243%) was more than double that of conventional. This was mainly attributed to high farm gate price of organic fruits, low paid labour use and electricity. As a consequence, organic kiwifruit production seems to become a feasible option in Korea. However, high dependence on imported farming material, fuel and labour for too frequent liquid fertilizer spray should be addressed to achieve long term sustainability of organic kiwifruit production.

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The distribution, characteristics and utilization of Korean native Actinidia Genus

  • Cho, Y.;Cho, H.;Park, M.
    • Korean Journal of Organic Agriculture
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    • v.19 no.spc
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    • pp.30-34
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    • 2011

  • A. arguta is found nationwide whether the altitude is low or high if good drainage is achieved with plenty of water. The distribution of A. polygama seems to be more limited to higher altitude than A. arguta so it can be found in deep valley of highland even in Mt. Halla. A. kolomikta seems rather limited to colder area than A. arguta to Mt. Jiri to the south. Meanwhile, A. rufa is very confined to southern islands including Jeollanamdo and Jeju islands. Some institutes still continue to utilize Korean native Actinidia plants commercially since early 1980's. More collaborative efforts are needed for further development of these plants nationwide.

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