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Keun Jin Choi(崔根鎭),Seung Eui Park(朴勝義),Moon Sup Chin(陳文燮),Hong Sook Lee(李弘䄷,),Keun Young Park(朴根龍) 한국육종학회 1994 한국육종학회지 Vol.26 No.2
The segregating frequency distribution of stay-green score and days to ear leaf senescence(DELS) from silking generally had a simple bi-modal pattern irrespective of planting dates and the pattern of stay-green score shifted to higher level with later stages. The Hi39/KS75 had the longest DELS and it showed highest stay-green characteristics at 67 days after silking(DAS). The KS75 was considered a useful material in breeding of stay-green lines. The distribution patterns of F₂ progenies of Ga209/Hi39 and Ga209/KS75 had highly characterized as related to stay-green at 37 DAS, but that of characteristics shifted to lower levels at 52 DAS, and maintained up to 83 DAS. In the progenies of the three crosses, F₂ from Hi39/KS75 showed high from early days after silking in stay-green score, DELS and number of fresh leaf. It was possible to obtain higher stay-green lines than those of parents in the cross of Hi39/KS75.
최근진 ( Choi Keun Jin ) 한국지식재산연구원 2004 지식재산논단 Vol.1 No.1
Seed Industry Law was established and published on December 6, 1995, and revised on January 21, 1999, on July 1, 2001 and on December 11, 2003. The purpose of the Law is to develop seed industry and to contribute to stability of agriculture, forestry, and fishery by enacting provisions on protection of the breeder's right, management of variety performance of major crops, seed production, certification, marketing and etc. The Seed Industry Law of 1997 provides plant variety protection along with the 1991 UPOV Act. The Seed Industry Law was composed 9 Chapter, 176 Article, 13 Addenda, and major provisions are protection for the new variety of plant, registration of variety denomination, management of variety performance, certification of the seed and control of the market seed. The National Seed Management Office (NSMO), as an implementing agency for the Plant Variety Protection has been reorganized in 1998. The Variety Protection Appeal Committee was established in the Ministry of Agriculture and Forestry (MAF) in order to conduct an appeal on any decision taken by the examination officers in NSMO. Plants can be entitled to variety protection which genus or species of the plants designated as plant variety protection under this Law, and which shall be determined in accordance with an Ordinance of the Ministry of Agriculture and Forestry. There are 113 plant genera and species designated as plant variety protection by the end of 2003.
Keun Jin choi(崔根鎭),Keun Yong Park(朴根龍),Hong Seok Lee(李弘䄷,) 한국육종학회 1995 한국육종학회지 Vol.27 No.1
Maize yield could be increased by selecting promising individual plants with ideal plant type not only for total leaf area index(LAI), but also for larger leaf size near the extremes of the canopy. This approach might have limits as total LAI is increased unless selection for leaf angle is practiced concurrently because above leaf angle is very important to increase the productivity at greater LAI than 5.0. Estimated value for leaf angle at the third leaf above and below the ear leaf, and for leaf width and length of topmost ear leaf of three inbred lines and their diallel cross F₁ and F₂ were obtained to investigate the inheritance of leaf angle, width and length. Third leaf above the ear leaf of topmost ear was tied more errect than that of third leaf below the ear leaf. Leaf width became larger when planted on April 23 than May 22, but leaf length became little longer when planted on May 22 than April 23. The cross between two inbreds with maximum-different leaf angle was 41.7˚ for the above leaf, and 31.0˚ for the below leaf expressed high heterosis in F₁ and F₂ population. Leaf angle showed the highest heritability (0.508) among three leaf characters. Among three crosses, Hi39/KS75 showed the highest heritability for leaf angle and length, and Ga209/KS75 for leaf width. Leaf angle, width and length revealed normal distributions in F₂ populations. The erect type, larger and longer leaf presented complete or partial dominance. The frequency distribution patterns of three characters showed similar curvatures at two planting times in F₂ populations of three crosses.
Keun Jin Choi(崔根鎭),In Kyun Shin(申仁均),Ki Ho Suh(徐基浩),Jong Seo Park(朴鍾緖) 한국육종학회 1996 한국육종학회지 Vol.28 No.4
Many countries are developing a legal framework of protecting plant varieties as an intellectual property right. The Uruguay Round of GATT gave an important impetus to this development. The establishment of such a legal system requires sound procedures and profound knowledge of variety registration. The Plant Variety Protection Act (PVPA) in USA, enacted on December, 1970, and amended in 1994, provides legal protection, similar to patents, to the developers of new varieties of plant which are sexually reproduced by seeds or propagated by tubers. Bacteria and fungi are excluded. The PVPA is administered by the United States Department of Agriculture. A certificate of protection is awarded to an owner of a variety in an official examination has shown that it is new, distinct from other varieties, and genetically uniform and stable through successive generations. The term of protection is 20 years for most crops and 25 year for trees, shrubs, and vines. The owner of a U.S protected variety has exclusive rights to multiply and market the seeds of that variety.
Keun Jin Choi(崔根鎭),Seung Eui Park(朴勝義),Moon Sup Chin(陳文燮),Hong Seok Lee(李弘䄷,),Keun Young Park(朴根龍) 한국육종학회 1994 한국육종학회지 Vol.26 No.1
High heterosis was expressed in the days from silking to ear leaf senescence(DELS) of F₁ and even in that of F₂ population with Hi39/KS75. In the number of fresh leaf, fresh leaf area and chlorophyll content, highly positive heterosis was observed in F₁ but negative heterosis in F₂ population except Hi39/KS75. Inbreeding depression in the number of fresh leaf, fresh leaf area and chlorophyll content appeared remarkably with the progress of growth especially from 37 to 52 days after silking(DAS) in April 23 planting, but Hi39/KS75 had low inbreeding depression in DELS compared to other two F₂ populations. Among the characters related to stay-green, the number of fresh leaf showed the highest heritability in the crosses with three inbreds Ga209, Hi39 and KS75. The other characters except the days to maturity also exhibited relatively high heritability. Hi39/KS75 showed very high heritability irrespective of planting dates. The stay-green score was found to be significantly correlated with the number of fresh leaf, fresh leaf area and chlorophyll content at the DAS 52. A multiple regression analysis with F₂ population revealed that the number of fresh leaf was much accountable for the variation in DELS and stay-green score, but less accountable in later growing stage.