• KOREAN JOURNAL OF CROP SCIENCE
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• v.46 no.1
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• pp.17-21
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• 2001

Soybean mosaic virus (SMV) resistance of Korean recommended soybeans was evaluated naturally and by mechanical inoculation in Suwon. Based on the differential reaction of forty-four soybean genotypes tested to nine different SMV strains, soybeans were classified into twenty-four groups. Myeongjunamulkong and Ilpumgeom-jeongkong showed a high degree of resistance to nine SMV strains, having no symptom. The other cultivars produced various reactions according to inoculation of each SMV strain: symptomless, mosaic or systemic necrosis. Only five cultivars such as Kwangankong, Eunhakong, Tawonkong, Namhaekong, Sobaegnamulkong were totally susceptible to every strain. There was variation in disease incidence. Soybeans, having the highest levels of resistance to G5H and G7H in the greenhouse, showed the lowest levels of SMV incidence in the field of Suwon. Myeong-junamulkong, Ilpumgeomjeongkong, Soyangkong, Pungsannamulkong, Sodamkong, Jangmikong, Geomjeong-kong2, Pureunkong, Sinpaldalkong2, Duyoukong, and Geumgangkong were fairly resistant to SMV. And SMV incidence of Taekwangkong, Saealkong and Baegunkong was over 45% with symptom of bud necrosis. And soybeans, highly resistant to SMV in the field and the greenhouse, were mainly derived from Jangyeobkong and Hwang-keumkong resistant to G1-G7.

• Research in Plant Disease
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• v.19 no.3
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• pp.216-219
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• 2013

A total of 75 soybean cultivars developed in Korea was screened against soybean cyst nematode (SCN), Heterodera glycines HG type 2.5. Cysts developed on soybean cultivars ranged from 104 to 624 cysts per pot. There was no resistant cultivar but 'Jangyeopkong', 'Saealkong', 'Miryangkong', and 'Mansukong' were moderately resistant; 33 cultivars were moderately susceptible and the other cultivars were susceptible. 'Jangyeopkong', 'Saealkong', 'Miryangkong', and 'Mansukong' could be recommended for soybean fields infested with SCN until developing SCN resistant soybean.

• Applied Biological Chemistry
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• v.43 no.3
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• pp.207-212
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• 2000

Physicochemical and sensory characteristics of soybean sprouts from domestic and foreign soybean cultivars were investigated. 100-seed weights of domestic cultivars were much larger than that of Canadian cultivar and recommended cultivars were larger than traditional cultivars. Water absorption of soybeans increased sharply to initial 6 hrs during steeping, and did not change much thereafter. In all soybean cultivars 16 amino acids were detected and the contents of Asp, Glu, Lys and Arg were more than 50% of total amino acid contents. All soybean cultivars showed some difference in composition of fatty acids and the content of linoleic acid was highest. The contents of K and P were high and those of Fe and Zn were low. The compression force of hypocotyl after cultivation was the highest in Eunha and the lowest in Junjeori and the compression force of cotyledon was the highest in Danyeop and the lowest in Canadian cultivar. Qualitative discription analysis for cooked soybean sprouts and soups showed significant difference in 6 characteristics of yellowness of cotyledon, size of cotyledon and so on.

• Journal of the East Asian Society of Dietary Life
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• v.26 no.4
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• pp.325-333
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• 2016

This study investigated the proximate compositions and sensory attributes of fresh and boiled soybean sprouts. The sensory attributes of cooked soybean sprouts (Kongnamulmuchim) were also assessed after boiling and seasoning. Proximate compositions were analyzed from the total sprout, cotyledon and hypocotyl without hair root. Soybean sprouts cultivated with four recommended soybean cultivars (Nokchae bean, Dawon bean, Seonam bean and Pungsannamul bean) in a lab and then used for analysis. Carbohydrate, protein, lipid and ash contents were lower, while moisture was lower, in the cotyledon than in the hypocotyl of fresh soybean sprouts, regardless of the bean type. Each soybean sprout showed different contents of chemical constituents in total sprout, cotyledon, and hypocotyl parts. Sensory attributes such as odor, flavor, and overall acceptability were evaluated. Each panels showed a response on a 9-point rating scale. The acceptability of fresh soybean sprouts was negatively correlated with beany and grassy tastes, but positively correlated with nutty and sweet tastes. The acceptability of boiled soybean sprouts was negatively correlated with beany and grassy flavors, and positively correlated with nutty odor and flavor. In addition, acceptability of cooked soybean sprouts (Kongnamulmuchim) was positively correlated with nutty and sweet flavors. The beany and grassy flavors limited acceptability of fresh soybean sprouts, whereas the prominence of nutty flavor might contribute to acceptance of boiled and cooked soybean sprouts.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.61 no.2
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• pp.104-112
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• 2016

A double-cropping system with soybean (Glycine max) following the cultivation of potato, garlic, and onion is widely adopted in the southern region of Korea. For this system, marginal dates for planting must be determined for profitable soybean yields, because the decision to plant soybean as a second crop is occasionally delayed by harvest of the first crop and weather conditions. In order to investigate the effect of planting date on soybean yield, three cultivars (early and late maturity) were planted on seven different dates from May 1 to July 30 in both paddy and upland fields across 2012 and 2013. Soybean yields were significantly different among the planting dates and the cultivars; however, the interaction between cultivar and planting date was not significant. Based on linear regression, the maximum yield of soybean was reached with a June 10 planting date, with a sharp decline in yield for crops planted after this date. The results of this study were consistent with those of a previous one that recommends early and mid-June as the optimum planting period. Regardless of soybean ecotype, a reduction in yield of greater than 20% occurred when soybean was planted after mid-July. Frost during soybean growth can reduce yields, and the late maturity cultivars planted on July 30 were damaged by frost before completing maturation and harvest; however, early maturity cultivars were safely harvested. For sufficient time to develop and reach profitable yields, the planting of soybean before mid-July is recommended.

• Korean Journal of Food Science and Technology
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• v.22 no.3
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• pp.363-368
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• 1990

As a work on the investigation of the processing aptitude of the Korean soybean cultivars, the soybean curd was made from 19 Korean soybean cultivars on a laboratory scale. The yield, proximate composition and rheological and organoleptic property of the resultant soygean curd were analyzed. The yields of soybean curd were ranged from 262.33% to 311.63%, being positively correlated with the soluble protein contents of the recommended soybean cultivars (r=0.9621). The recovery rate of protein in Baekun and Yeunha to the soybean curd was 72.94%, 70.62%, respectively. More than 80% of lipid in soybeans of Yeunha, Dankyung, Danyeob was transferred to the soybean curd. Lightness of the soybean curd made from Baekun, Kwanggyo, Saeal, Hill was higher than that of the others. The mechanical hardness of the soybean curd was strongly correlated with the final moisture content of the soybean curd (r =-0.8312), but not with the protein content of the soybean (r=0.1848). In the organoleptic test for color, texture, flavor and overall preference of the resultant soybean curd, the quality of Dankyung, Namcheon, S-138, Baekun was evaluated highly.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.26 no.2
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• pp.179-184
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• 1981

The study was conducted to know the differential growth responses of soybean cultivars as affected by various application stages of Metribuzin herbicide, at the University experimental farm of Chonnam Nat'l. Univ, Kwangjoo, 1980. Experimented soybean materials were six cultivars, as Kwanggyo, Dongbuktae, Bongui, Yukwoo 3, Suweon 85, and Suweon 86., . and Laid-out application stages were five as pre-sowing, Pre-emergence, Early Post-emergence, and Late Post-emergence treatment comparing with Control. Results obtained from the study were as follows: Among experimented soybean cultivars, no significantly tolerant cultivar was shown. Highly significant differences in phytotoxicities by Metribuzin treatments were detected among various application stages, and crop tolerances were recognized bigger in order as E. Post-emg. < L. Post-emg. $\ll$ Pre-emg. < Pre-sowing $\leq$ Control. The phytotoxic symptoms of all soybean cuitivars were severely recorded in order of Leaf No. /Plant < Plant height $\ll$ Branch No. /Plant. For the cultivation of most soybean cuitivars, the use of Metribuzin in Pre-sowing or Pre-emergence were recommended, and especially it is expected to follow of more detailed study on soil-incorporation method in Pre-sowing treatment, and rather the tank-mixture system of Metribuzin with others than the mono-application system for the safe-use and enlargement of weeding-spectrum.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.4
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• pp.382-388
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• 1994

For the comparision of the differences in dry matter weight and the chemical composition of soybean seeds in relation to utilization styles and storage durations, the seed coats and cotyledons including embryo axis separated from the seeds of 3 recommended cultivars stored for 3 years and of 5 recommended cultivars and 2 local varieties with black seed coat and green cotyledons were observed in dry weight, germination percentage, protein, oil, soluble sugar, oilgosaccharide, and starch. In the seeds stored for 3 years, dry weight and germination rate were decreased distinctively. This decrease of seed dry matter resulted from the decrease of the cotyledon weight, and the ratio of seed coat to whole seed was increased. For the change of chemical compositions by the decrement of seed dry weight during the storage, protein, oil, and carbohydrate contents of the seed coat were decreased, and protein content of the cotyledon was markedly decreased in the seeds stored for 3 years. The ratio of seed coat to whole seed was higher in small seed than large seed cultivars. In the local varieties, protein and oil contents were 43.59% and 18.25% in the cotyledons, respectively, which were lower than those of recommended cultivars. But starch and sugar contents were 5.70% and 11.58%, respectively, which were higher than those of recommended cultivars. Sucrose, raffinose and stachyose contents were also higher in the cotyledon of the local varieties.

• Food Science and Biotechnology
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• v.17 no.5
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• pp.1122-1127
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• 2008

A high dietary oxalate intake may lead to calcium oxalate (CaOx) kidney stones in the gastrointestinal tract. Most soy foods contain high concentrations of oxalate and/or phytate. This study analyzed the changes in oxalate (Ox), phytate ($InsP_6$), and calcium (Ca) during soymilk processing from the seeds of Korean recommended soybean cultivars (cvs). The contents of Ox, $InsP_6$, and Ca in 21 cvs ranged from 14, 108, and 148 to 231, 279, and 246 mg/100 g of dry seed, respectively. Seven cultivars were selected from the 21 cvs by the distributions of Ox, $InsP_6$, and Ca. Then, each contents of soymilk prepared from the 7 cvs were determined. All contents were lower in soymilk than in seeds, but the Ox to $InsP_6$ ratios changed from varying ratios (0.1-0.8) to normal ratios (0.8-1.0) in all cvs except 'Paldalkong'. Consequently, during soymilk processing, the Ox content was decreased and the $InsP_6$ content was remained higher than the Ox content although the Ox was likely to be less reductive than the $InsP_6$. These results may provide better information for minimizing the risk of formation of Ox kidney stones due to consumption of soy products.

• 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.