• KOREAN JOURNAL OF CROP SCIENCE
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• v.26 no.4
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• pp.324-331
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• 1981

Sixty five soybean varieties were tested to observe varietal response and to get the basic data for resistant variety breeding to soybean cyst nematode (Heterodera glycines I.). They were classified into five groups, from the most resistant to the most susceptible by decreasing rate of seed weight. A few Korean varieties were included in the most resistant group. In general, early maturing varieties were more susceptible. Total plant weight could be used as an important criterion to select a resistant variety to soybean cyst nematode.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.1
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• pp.38-45
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• 1993

Gel consistency data collected from various experiments in same location during 1988 to 1992 were analysed to clarify the degree of varietal and environmental variation in rice. Most of japonica and Tongil-type rice varieties were belonged to soft gel consistency, and average gel length of japonica rice was longer than that of Tongil-type varieties. Gel length of glutinous rice cultivars was extremely long, near 100mm. Year variation of gel consistency was recognized, but did not affect on varietal difference. Gel consistency of most rice varieties and pedigree lines tested varied slightly between different seeding dates or nitrogen levels, but gel length of two indica rice varieties were decreased with the later seeding dates or the higher nitrogen levels. Rice varieties belonged to extremely hard or extremely soft gel consistency showed less variation of gel length between different years, seeding dates or nitrogen levels compared with intermediate ones.

• FLOWER RESEARCH JOURNAL
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• v.16 no.4
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• pp.325-332
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• 2008

This paper outlines the system and operation of plant variety protection right and plant patent of ornamental crops in USA to guide for application of new varieties developed in Korea and to use for national examination of applied variety from USA. The Plant Variety Protection Act(PVPA) in USA is given as PVPR to the developers of new variety for the seed propagating crops and tubers and provides as plant patent for asexually reproducing crops. A certificate of PVPR and plant patent is awarded to an owner of a variety has shown that it is new, distinct from other varieties, genetically uniform and stable through successive generations by official evaluation without the growing trial. The term of protection for plant patent and PVPR for most crops is 20 years but 25 years for trees, shrubs, and vines. The application of ornamental variety in USA is mostly for plant patent. The application of ornamental crops accounted for 87% of total applications for plant patent. The ratio of new variety applications for plant patent from national and foreign countries is not significant differences.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.23 no.2
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• pp.68-75
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• 1978

Experiments were conducted to find out the optimum seeding rate and amounts of fertilizer application for seedling growth of five for machine transplanting. Number of leaves of seedlings increased as seeding rate decreased, but there was no significant differences in leaf number among fertilizer levels. At a seeding rate higher than 100g/box. number of leaves was less than 4.5, but more than five leaves were developed at a seeding rate of 50g/box.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.2
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• pp.156-161
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• 1986

Silage productivity and resistance to rice black streaked dwarf virus (RSDV) of six Korean-improved and six US introduced corn genotypes were tested in the southern part of Korea. There was a negative correlation between culm length retarded by RBSDV and coefficients of variance of culm length. Frequency distribution of culm length could be classified as three genotypic groups according to the type of distribution and percentage of RBSDV diseased plants. There were negative correlations between percent RBSDV diseased plants at harvest and culm length, percent ear bearing plants, silage yield, or ear yield, but percent RBSDV diseased plants did not related to the ear/silage ratio and stover yield. Silage yield of Pioneer XCF38 was highest, but that of Suweon 89 and NC 6131 was lowest. However, there was not signi-ficant difference in silage yield among the remaining genotypes. Pioneer XCF38, Suweon 89, and Jinjuok were quite resistant to RBSDV, but Suweon 19, Kwangok, Hoengseongok, Jecheonok, and Pioneer 3424 were susceptible and NC 6131 was most susceptible to RBSDV. Although Jinjuok and Suweon 89 were resistant to RBSDV, silage yield was not high because of early senescence of leaves after silkillg.

• Korean Journal of Breeding Science
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• v.41 no.3
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• pp.346-348
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• 2009

A golden double freesia (Freesia hybrida Hort.) "Golden Amor" was developed from a cross 'Golden Crown' and 'White Wing' followed by seedling and line selections at the National Horticultural Research Institute, Rural Development Administration (RDA) in 2005. Growth and flowering characteristic tests were conducted from 2000 to 2005. "Golden Amor" has large double type flower with bright golden color (RHS 12B). It have multiple florets, good flower shape, upright leaves and stalks. The average yield of "Golden Amor" was 6.0 cuttings per plant in greenhouse carried out from 2003 to 2005. It has good production of cormlets, vigorous growth and resistance to Fusarium and virus. "Golden Amor" would be cultured under greenhouse condition in Korea.

• Korean Journal of Plant Resources
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• v.8 no.3
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• pp.287-296
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• 1995

Stability of yield and yield components in 6 cotton cultivars were evaluated using data from the regional yield trials at two sites from 1987 to 1990. Genotype-environment interactions were analyzed by the modified model of Eberhart and Russell. The results revealed that Mokpo 7, which had many effective number of bearing branches and capsule, was the most stable high yielding variety over a wide range of environmental variations. bearing branches and capsule, was the most stable high yielding variety over a wide range of environmental variations.

• Korean Journal of Medicinal Crop Science
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• v.16 no.5
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• pp.306-312
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• 2008

Total sugar, crude protein, crude lipid, ash, total polyphenol, extract and betaine contents of various Lycii fructus species (Cheongyang jaerae, Myungan, Bulro, Cheongdae, Jangmyung, Cheongwoon, Cheongyang NO.6, and Cheongyang NO.7) were investigated according to harvest time at intervals of one momth from mid August to mid November. In Cheongyang NO.6, average content of total sugar and extract were the highest, 28.91% and 62.31%, respectively. In Cheongyang NO.7, crude protein (3.24%), total polyphenol (2.13%), betaine(10.77 mg/g) were the highest and crude lipid (6.82%) was the higest in Cheongdae species, and ash (5.83%) was the highest in Cheongwoon species. At the most of the species (except Cheongyang jaerae, Myungan) crude protein, crude lipid, ash and betaine contents were increased, and total sugar, total polyphenol and extract contents were decreased according to harvest time was lated. Also, a relationship among the components of Lycii fructus was found out. ; excract contents (r = 0.81) were increased as total sugar contents were increased, while crude protein (r = -0.88), crude lipid (r = -0.82), ash contents (r = -0.81) were decreased as that And betaine contents (r = 0.90) were increased as total polyphenol contents were increased.

• KOREAN POULTRY JOURNAL
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• v.8 no.1 s.75
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• pp.101-105
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• 1976

• The Hankook-Saengyark Bo
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• no.202
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• pp.3-3
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• 1996