• Korean journal of applied entomology
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• v.44 no.4 s.141
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• pp.287-292
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• 2005

The soybean varieties the bean bug preferred the least were Kwangankong, Namhaekong, Sunamkong, Sorogkong, and Anpyeongkong, and next to them was Pungsannamulkong, among 25 varieties examined. Myongjunamulkong and Eunhakong supported a good growth of the bug as the daily gains of weight of 3rd instar nymphs were 14,9 and 13.9 mg, respectively. On the other hand the bug on Punsannamulkong gained weight daily as little as 10.1 mg. On Pungsannamulkong the nymphal development of the bean bug took $24.5{\pm}2.1$ days, about three days longer than those on Myunjunamulkong and Eunhakong. The survival of the bean bug on Punsannamulkong was 83%, slightly lower than those on Myunjunarnulkong and Eunhakong. It seemed evident that Pungsannamulkong have a non-preference type resistance to the bean bug.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.1
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• pp.68-77
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• 1992

The present experiments were conducted to investigate the variability of hypocotyl elongation among the major soybean varieties by checking several conditions. The results obtained are summarized as follows. The rate of hypocotyl elongation is the highest during the day from 3.0 to 3.5 after seeding. It follows that it may be reasonable to evaluate the hypocotyl elongation of soybean seeds by comparison of hypocotyl length. And the tested 15 major cultivars could be classified as follow ; long ; Eunhakong, Janggyungkong and Bokwangkong, medium ; Namhekong, Dangyung-kong, Danyubkong, Milyangkong, Dugyukong, Paldalkong, Mangunjoseng, Namchunkong and Seal kong, short ; Gwanggyo, Begunkong and Jangbegkong. The hypocotyl elongation in small seed is longer than large seed. Correlation coefficients(r) for the relationships between 100 seed weight and hypocotyl elongation is -0.2506$^{**}$. As the rising temperature, the hypocotyl length is elongated, and longest at the range of 30 to 35$^{\circ}C$. The effects G $A_3$ hastened the hypocotyl elongation of soybean seed, and ABA, Kinetin and BA inhibit it, and that of those in short hypocotyl cultivars are higher than long hypocotyl cultivars. Hypocotyl length of long hypocotyl cultivars are longer than that of short hypocotyl cultivars under high temperature pre -treatment.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.24 no.3
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• pp.59-65
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• 1979

Severe outbreak of necrotic. soybean mosaic virus. (SMV -N) strain has been observed on soybean (Glycine max) in the central northern pans of Korea. Thirty soybean cultivars developed from Korea. Japan, and USA were tested for the estimation of infection percentages and ratings at 4 different planting dates. SMV-N infection was decreased by delaying the planting dates, but no differences were observed in conmon mosaic virus. Most of the soybean cultivars developed in Korea, and Japan were more susceptible to SMV- N than the US developed cultivars. Infection ratings of SMV-N showed highly significant negative correlations with common SMV regardless of planting dates.

• The Korean Journal of Food And Nutrition
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• v.17 no.2
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• pp.229-235
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• 2004

Chemical composition, total dietary fiber(TDF), oligosaccharide, isoflavone and phytic acid contents of seven domestic and three imported soybean cultivars were determined. TDF contents were ranged from 16.83 to 21.71％(w/w) without remarkable differences among soybean cultivars. Phytic acid contents of domestic cultivars such as Geomjongkong 1 (3.02％) and Dawonkong (2.92％) were higher than imported ones such as Canadian (2.07％) and American (2.22％) soybeans for soybean sprout and US No. 1 (2.16％). The phytic acid contents of cotyledon parts were 1.5 to 2 times higher than those of hypocotyl parts. Isoflavone contents in whole seed were wide ranged from 371 to 2,398 $\mu\textrm{g}$/g among cultivars and it were existed mainly as glucoside isomers. Profiles of isoflavone aglycones were composed of 52％ genistein, 36％ daidzein and 11％ glycitein. Hwanggumkong, Dawonkong, Geomjongkong 1 and American soybean for sprout contained lower isoflavone than others. Hypocotyl parts of soybeans contained from 6120.1 to 16921.1 $\mu\textrm{g}$/g isoflavone with ratio of 48％ glycitein, 35％ daidzein and 10％ genistein. Isoflavone contents of cotyledon parts were ranged 375-2393 $\mu\textrm{g}$/g, composition of which had no glycitein, 55％ genistein and 38％ daidzein. Oligosaccharide contents were similar among cultivars. Stachyose of 3.0-3.9％, raffinose of 0.8-1.2％, sucrose of 4.5-7.8％ and fructose of 0.3-0.8％ were determined.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.45 no.6
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• pp.405-410
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• 2000

This experiment was conducted to investigate to the degree of damage by stink bugs at the soybean fields of Kyong-buk Agricultural Research and Extension Services from 1997 to 1998. Thirty different soybean varieties including Hwangkeumkong were used. Stink bugs collected in the soybean fields were Riptortus clavatus, Nazara antennata, Piezodorus hybneri, Dolycoris baccarum, and Halyomorpha halys, etc. The damage rates by stink bug were 5.0-12.5% in determinate types and 36.1-50.0% in indeterminate ones, which indicated that stink bugs preferred indeterminate types to determinate ones. The control values to sting bugs by fenitrothion, triaazophos, and carbaryl, were 83.4%, 69.5%, and 87.0%, respectively.

• Korean Journal of Breeding Science
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• v.41 no.4
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• pp.488-495
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• 2009

In recent years, an increasing amount of research has been conducted on the yield loss of soybean crop caused by Riptortus clavatus, a serious pest of legumes. The objective of this study were to examine crop damage caused by various population densities of R. clavatus and determine the association of unique growth and seed characteristics with crop damage rate in conventional soybean fields. Major growth responses to R. clavatus were examined. The cultivars that were not as seriously damaged by R. clavatus were Pungsannamulkong, Sobaegknamulkong, Duyoukong, and Sinpaldal 2, but Myeongjunamulkong, Mallikong, and Hwangkeumkong were significantly (P<0.05) damaged. The rate of seed damage caused by R. clavatus was 8.2% in a group of brown colored pubescence, while the rate was 13.0% in a group of the gray colored. Crop damage by R. clavatus clearly more reduced in cultivars with dark hilum colors including dark brown, brown, and grayish brown than those with yellow hilum colors. Concerning pod colors, crop damage was less significant in cultivars with dark brown pod color than with the light brown. Cultivars with short pod length (4.0-4.5 cm) at full seed (R6) stage showed lower seed damage rates by R. clavatus than those with long pod length (>5.6 cm). Therefore, characteristics of hilum, pod, pubescence colors, and pod length were significantly related and linked to the cultivar resistance to R. clavatus.

• Korean journal of applied entomology
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• v.14 no.3 s.24
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• pp.133-136
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• 1975

Influence of susceptible and resistant soybean varieties to the development of the soybean cyst nematode(Heterodera glycines) was examined. It does not seem likly that there are any differences between varieties in attracting the Second Stage larvae of the nematode. In susceptible varieties, there were large populations and three generations during a ten·week examination period, while the resistant varieties maintained very low populations and had only two generations.

• Korean Journal of Environmental Agriculture
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• v.18 no.1
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• pp.66-69
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• 1999

To investigate the hormetic effect of the low dose ${\gamma}-ray$, soybean(Glycine max L.) seeds of three cultivars (Hwangkeumkong, Bansakong, S900 cv.) were irradiated with the dose of 0.5∼20.0 Gy and cultivated in the experimental field. The hormetic effects of the low dose ${\gamma}-ray$ on the growth of field experiment were different from each cultivar, that is, more effective in the S900 cultivar of black seedcoat color than in the Hwangkeumkong and Bangsakong of yellow ones. The germination rate of S900 cultivar increased about 30% in the 0.5Gy irradiated group compared with that of the control. The plant height of the 4.0Gy irradiated group in both Bangsakong and S900 cultivar increased 15% more than that of the control. Grain yield and the number of pod in 1.0 Gy and 4.0 Gy irradiated group of S900 cultivar and that of 2.0 Gy irradiated group of Hwangkeumkong increased 25 and 35% on the average, respectively.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.4
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• pp.336-342
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• 1993

To obtain the basic information necessary for the development of soybean varieties well adaptable to upland-paddy field rotational croppings, the difference of growth characteristics between upland and paddy-field including yield potentials of current recommending soybean varieties were evaluated. The growth characteristics, both above and under-ground, which were measured at flowering stage were generally greater in paddy-field but the number of root nodules was much greater in upland, thus the artificial inoculation was practically recommended for soybean growing in paddy-fields. Mean seed yield was generally higher in paddy-fields than in upland. All soybean varieties showed higher seed yield in the early planting date, April 20, were somewhat susceptible to soybean mosaic virus(SMV), thus they could be escaped from the disasterous endemic necrotic soybean mosaic virus(SMV-N). Soybean varieties showed over 4.0 tons/ha seed yield in the paddy-field were Williams 79, Union, SS77053, and Namhaekong. At the same time, Jangyeobkong and Danyeobkong were the most stable soybean varieties among the tested soybean varieties with less than 10% of coefficient variation values in all planting dates in paddy fields. Compared with Hwangkeumkong which is most widely being cultivated on farmer's fields, soybean varieties showed high yields in paddy-field were higher in plant height, less in the number of branches, and more in the number of nodes on main stem. At the same time, they had medium seed size which would bring the good germination and stands. Disease resistance especially for necrotic soybean mosaic virus was also one of the most decisive factors in seed yields for the early planted soybeans.

• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.7
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• pp.870-878
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• 2009

This study was conducted to select the soybean cultivar to minimize the formation of calcium oxalate, and investigate the ingredients for total oxalate (Ox), phytate ($InsP_6$) and minerals such as calcium (Ca), magnesium (Mg), sodium (Na), zinc (Zn), and potassium (K) in 113 recommended soybean cultivars in Korea. Ca content ranged from 0.586 mg/g in Saealkong to 3.177 mg/g in Daolkong, and Mg content ranged from 0.559 mg/g in Taekwankong to 3.085 mg/g of dry seed in Seonheukkong. The total oxalate content ranged from 1.24 mg/g in Seonheukkong to 3.81 mg/g in Ilmikong, and InsP6 content ranged from 0.43 mg/g in Mailikong to 4.72 mg/g of dry seed in Dagikong. In the cross-correlation analysis for the contents of Ca, Mg, Ox and $InsP_6$, Seonheukkong and Danmi2 were selected to minimize the formation of calcium oxalate because the contents of Ca and $InsP_6$ were much higher than the content of Ox. These cultivars could be useful for producing soy foods beneficial to populations at risk for calcium oxalate kidney stones and for improved mineral bioavailability.