• Title/Summary/Keyword: Plant genetic resources

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A New Potato Cultivar "Early Valley", with High Yield and Early Maturity

  • Lim, H.T.;Dhital, S.P.;Khu, D.M.;Choi, S.P.;Kang, C.W.;Kim, T.J.;Mo, H.S.;Hwang, W.N.;Lee, W.J.
    • Korean Journal of Breeding Science
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    • v.41 no.1
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    • pp.61-67
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    • 2009

  • "Early Valley", is an early maturing potato cultivar with high yield potential. "Early Valley" is a clonal selection resulting from the cross between 'Suncrisp' and 'A87109-10'. It has medium plant height and light green foliage. "Early Valley" has medium flowering habit and white flowers. Tubers are smooth, yellow skin, light yellow flesh, round tuber shape, medium eye depth, and medium dormancy and good keeping quality. It has stable yield under wide range of climatic conditions. "Early Valley" is resistance to late blight, but moderately susceptible to common scab and hollow heart. This cultivar is also resistant to potato rotting at harvesting during the raining season. "Early Valley" has high level of antioxidant activity (about three times higher) and vitamin C (higher by 40%) than the 'Superior'. This cultivar has high level of tuber uniformity and capable of yielding 36.56 t/ha which is 17.07% higher than the control potato cultivar 'Superior' under optimum agronomical practices.

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Gui Valley: A High Yielding Potential and Good Processing Potato Cultivar

  • Lim, Hak-Tae;Dhital, Shambhu Prasad;Khu, Don-Man;Li, Kui-Hwa;Choi, Seon-Phil;Kang, Chang-Won;Kim, Tae-Joo;Mo, Hwang-Sung;Hwang, Won-Nam;Lee, Woo-Jong
    • Korean Journal of Plant Resources
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    • v.22 no.6
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    • pp.483-488
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    • 2009

  • The main objective of this breeding program is to develop high yielding, disease resistance and good processing potato cultivar. 'Gui Valley' is a clonal selection resulting from a cross between 'ND2471-8' and 'Cona'. It has medium plant height and light green foliage. 'Gui Valley' has medium flowering habit and light pink flowers. 'Gui Valley' is a medium maturing potato cultivar and tubers are smooth, yellow skin, light yellow flesh, long-oval tuber shape, distinct red eyes with medium depth and medium dormancy. It has high level of tuber uniformity and good keeping quality. 'Gui Valley' demonstrates resistance to potato virus Y (PVY), soft rot, but moderately susceptible to late blight and common scab. It is also resistant to most of the internal and external physiological disorders particularly dehiscence, hollow heart and internal brown spot. The specific gravity of 'Gui Valley' is significantly higher (1.097) than that of 'Shepody' (1.078). 'Gui Valley' has suitable for processing mainly French fries and chips. This cultivar has high level of tuber uniformity and capable of yielding 37.6 $t{\cdot}ha^{-1}$, which is 18.2% higher than the control potato cultivar 'Shepody' under optimum agronomical practices.

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Establishment of Genetic Transformation System and Introduction of MADS Box Gene in Hot Pepper (Capsicum annuum L.)

  • Lim, Hak-Tae;Zhao, Mei-Ai;Lian, Yu-Ji;Lee, Ji-Young;Eung-Jun park;Chun, Ik-Jo;Yu, Jae-Woong;Kim, Byung-Dong
    • Journal of Plant Biotechnology
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    • v.3 no.2
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    • pp.89-94
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    • 2001

  • In vitro plant regeneration of inbred breeding line of hot pepper (Capsicum annuum L.) was established using leaf and petiole segments as explants. About 28 days old plants were excised and cultured on MS medium supplemented with TDZ and NAA or in combination with Zeatin. In all of the media compositions tested, combination of TDZ 0.5 mg/L, Zeatin 0.5 mg/L, and NAA 0.1 mg/L was found to be the best medium for shoot bud initiation. Young petiole was the most appropriate explant type for the plant regeneration as well as genetic transformation in hot pepper. In this study, HpMADS1 gene isolated from hot pepper was introduced using Agrobacterium-mediated transformation system. Based on the analysis of Southern blot and RT-PCR, HpMADS1 gene was integrated in the hot pepper genome. It has been known that floral organ development is controlled by a group of regulatory factors containing the MADS domain. Morphological characteristics in these transgenic plants, especially flowering habit, however, were not significantly altered, indicating this MADS gene, HpMADS1 may be non-functional in this case.

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