• Korean Journal of Breeding Science
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• v.41 no.3
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• pp.324-327
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• 2009

A new sprout-soybean cultivar, "Galchae" was developed at the National Institute of Crop Science (NICS) in 2008. Galchae was selected from a cross between YS1287 and Jinju#1. The preliminary, advanced, and regional yield trials to evaluate the performance of Iksan 64 were carried out from 2005 to 2008. This cultivar has a determinate growth habit with purple flower, brown pubescence, brown seed coat, brown hilum, rhomboid leaflet shape and small seed size (8.4 grams per 100 seeds). The maturity date of "Galchae" is 6 days later than the check variety, "Dawon". It has good seed quality for soybean-sprout and resistance to lodging. This cultivar has resistance to soybean mosaic virus (SMV) and necrotic symptom (SMV-N). The average yield of "Galchae" was 2.51 ton per hectare in the regional yield trials (RYT) for double cropping carried out for two years from 2007 to 2008.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.26 no.3
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• pp.243-250
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• 1981

Soybean, azuki-bean and mungbean were cultivated at different growing conditions, May 10, June 9, July 9 seeding, and May 10 seeding-short day treatment, to investigate the distribution of flowering date and the variation of pod/flower ratio. The growth habit type of the soybean variety used was determinate, but the azuki-bean and mungbean varieties used showed indeterminate growth habit. The pod/flower ratio ranged 38 to 48% for soybean, 23 to 34% for azuki-bean and 46 to 60% for mungbean along with growing conditions. Flower abscission for soybean and mungbean, and pod abscission for azuki-bean affected more on the number of matured pods. Soybean showed once full blooming period, but azuki-bean and mungbean showed two or three times full blooming period except July 9 seeding plot through the whole growing period. Flowers bloomed just after every full blooming period showed lower value of pod/flower ratio and higher pod/flower ratio was obtained from flowers bloomed before or far after full blooming at plots seeded May 10 and June 9 in three pulse crops. Most full blooming period of soybean coincided within 5 days near the terminal leaf appearance date, and number of flowers bloomed before terminal leaf expansion and matured pods from these flowers were major in every soybean plant at all growing codition plots. No relations were found between terminal leaf appearance and flowering or pod setting patterns of azuki-bean and mungbean.

• Korean Journal of Soil Science and Fertilizer
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• v.21 no.2
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• pp.141-148
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• 1988

Though the cultivation history of soybean in Korea is relatively long, taxonomical study on symbiont nodule bacteria, Rhizobium japonicum is not carried out yet systematically. This work was for the taxonomical study on Korean native R. japonicum by recognizing isolates seroimmunologically as well as for the elucidation of its affinity with host soybean variety. Twenty seven isolates from 13 soybean cultivars cultivated at Seoul National University's experiment field and 6 strains of R. japonicum preserved in our laboratory have been tested. Tube agglutination test, agglutinin adsorption test, and gel immune diffusion test were used. The results obtained are as follows: 1. Twenty five isolates and strains of R. japonicum among 33 were classified into 4 serogroups and identified as indivisual serotype. 2. Two isolates isolated from Hill and Milyang cultivars, 2 isolates from Bangsa and Jangbaek, and 4 isolates from Paldal, Sae-al, and Jangbaek were identified as the same serotype respectively. 3. Seroimmunological tests may be adapted for the elucidation of the affinities between the strains and soybean cultivars as well as strain recognition and systematic classification of Korean native R. japonicum.

• Korean Journal of Soil Science and Fertilizer
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• v.2 no.1
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• pp.69-73
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• 1969

In order to improve nearly unarable soils, poor in humus and poorly drained coarse textured, derived from fluvio marine deposit; a factorial experiment have been conducted to find out the influence of compost, increased potassium application and split application of potassium on the yield and germination of soybean variety Haman. The result obtained arid discussed may be summarized as follows. (1) The soybean yield increase was significant by the application of compost, increased amount of potassium and split application of potassium. (2) The application of compost significantly increased the numbers of germination. (3) The increased amount of potash and split application of potash fertilizer showed an apparent effect on the increase of germination and grain numbers per plant. (4) There was a positive relation between the number of grains per plant and the number of pods per plant, however, the increased numbers of pods per plant has not a direct effect for the increase of soybean yield per unit area. (5) Above results suggests that the improvement of nearly unarable Woolsuk Island soils derived from fluvio marine coarse material may be possible by the application of compost, increased amount and split application of potash fertilizer.

• Korean Journal of Weed Science
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• v.6 no.2
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• pp.191-200
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• 1986

The study was conducted to screen paraquat-tolerant plant species among crops and weeds, using the response of plant like leaf disc discoloration, visual injury and dry weight in the presence of paraquat. Mechanism of paraquat-tolerance was investigated in strains of soybean through evaluating activities of superoxide dismutase and peroxidase and the multiplication of callus derived from soybean cotyledon. In crops, Kwanggyo has been selected as a paraquat-tolerant variety among soybean cultivars tested, and Hood as a susceptible one. In weeds, Polygonum aviculare, Chenopodium album and Pinellia ternata were evaluated as the paraquat resistant species, providing the possibility for the donor plant species for paraquat resistance. Activity of superoxide dismutase known to detoxify paraquat was markedly greater in Kwanggyo, a paraquat-tolerant cultivar than in Hood, a susceptible one. In addition, the similar response like superoxide dismutase was observed in peroxidese activity. The greater inhibition of callus multiplication was determined in Hood, a susceptible one than a tolerant one, Kwnggyo. Based on all the informations, it is strongly proposed that paraquat tolerance in soybean is due to destruction of $O_2^-$ by elevated concentration of superoxide dismutase in the tolerant cultivar.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.46 no.6
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• pp.478-482
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• 2001

This experiment conducted to know physiological characteristics and stress effect on different growth stage of soybean by night illumination. Soybean variety, Shinpaldalkong 2, Keumjungkong and Muhankong were treated by night illumination with 20~30 Lux (0.05~0.08W m$^{-2}$ , 0.24~0.36 $\mu$㏖ S$^{-1}$ m$^{-2}$ ) for 15 days at six different growth stage, seedling, pre-floral initiation, post-floral initiation, pod filling and seed ripening stage. Night illumination delayed flowering to 2~8 days compared to control. Delay of flowering by night illumination severely effected at the pre-floral initiation stage. Stem length was increased all the night illumination treatments except the pod filling stage. Number of nodes in Shinpaldalkong 2 and Keumjungkong 1 were increased until before post-floral initiation stage but in Muhankong were increased until after post-floral initiation stage by night illumination treatments. Number of pods were decreased all the night illumination treatments except seedling stage compared with control. Yield decreased all the treatments and severe the loss rate degree showed the order of prefloral initiation, post-floral initiation, seedling and flowering stage.

• Molecules and Cells
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• v.40 no.2
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• pp.109-116
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• 2017

Soybean agglutinin (SBA) is an anti-nutritional factor of soybean, affecting cell proliferation and inducing cytotoxicity. Integrins are transmembrane receptors, mediating a variety of cell biological processes. This research aims to study the effects of SBA on cell proliferation and cell cycle progression of the intestinal epithelial cell line from piglets (IPEC-J2), to identify the integrin subunits especially expressed in IPEC-J2s, and to analyze the functions of these integrins on IPEC-J2 cell cycle progression and SBA-induced IPEC-J2 cell cycle alteration. The results showed that SBA lowered cell proliferation rate as the cell cycle progression from G0/G1 to S phase (P < 0.05) was inhibited. Moreover, SBA lowered mRNA expression of cell cycle-related gene CDK4, Cyclin E and Cyclin D1 (P < 0.05). We successfully identified integrins ${\alpha}2$, ${\alpha}3$, ${\alpha}6$, ${\beta}1$, and ${\beta}4$ in IPEC-J2s. These five subunits were crucial to maintain normal cell proliferation and cell cycle progression in IPEC-J2s. Restrain of either these five subunits by their inhibitors, lowered cell proliferation rate, and arrested the cells at G0/G1 phase of cell cycle (P < 0.05). Further analysis indicated that integrin ${\alpha}2$, ${\alpha}6$, and ${\beta}1$ were involved in the blocking of G0/G1 phase induced by SBA. In conclusion, these results suggested that SBA lowered the IPEC-J2 cell proliferation rate through the perturbation of cell cycle progression. Furthermore, integrins were important for IPEC-J2 cell cycle progression, and they were involved in the process of SBA-induced cell cycle progression alteration, which provide a basis for further revealing SBA anti-proliferation and anti-nutritional mechanism.

• Korean Journal of Breeding Science
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• v.43 no.3
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• pp.177-179
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• 2011

A new soybean cultivar 'Daewang' was released by Agricultural Research & Extension Services, Gangwon Province in 2008. The Goals of breeding the variety was for large seed size, high yield, lodging tolerance and resistance to diseases such as soybean mosaic virus (SMV) and bacterial pustule. 'Daewang' was derived from the cross of GWS91, which has yellow seed coat, large seed size and late maturity, and 'Seokryang-putkong', which has large seed size and early maturity. The preliminary, advanced and regional yield trials for evaluation and selection were carried out from 2002 to 2007. It has a determinate growth habit with purple flower, yellow seed coat, yellow hilum and large seed weight (33.6 g per 100 seeds). The maturity date of 'Daewang' is 16 days later than the 'Taekwang'. It has a high content of total isoflavone ($1,851{\mu}g/g$). The average yield of 'Daewang' was 2.68 MT/ha in the regional yield trials (RYT) carried out in four locations in Gangwon province from 2004 to 2007 which was 4 percent higher than the check cultivar 'Taekwang'.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.5
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• pp.762-766
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• 2011

Cropping system is very important for environment conservation and improvement of nutrient recovery rates in agricultural land. This case study was conducted to identify the nutrient balance of major upland cropping types with different districts. Typical cropping systems at MuAn and HaeNam located in the south coast district were cultivated with soybean-chinese cabbage or garlic and garlic-soybean-chinese cabbage-hot pepper. Alpine district, PyeongChang was cultivated with double cropping of chinese cabbage and potato-radish or chinese cabbage for one year. Typical cropping type of AnDong, YeongYang where are well known for hot pepper cultivation was hot pepper's mono cropping and hot pepper-soybean or hot pepper-sesame for one year. But SeoSan and HongSeong, where are located in mid-west coast had variety cropping system compareed to other districts. Double cropping of chinese cabbage, a heavy fertilizing crop, caused higher nutrient balance in the field when it was cultivated consistently. Experiment showed that heavy fertilizing crops, such as chinese cabbage, garlic and onion, need to be rotated with soybean and sesame cultivation which need smaller fertilizer level. Alpine arable land has shown higher nutrient balance than other areas, and the introduction of rotation crops are needed to reduce nutrient balance and environmental protection.

• Journal of the Korean Society of Food Culture
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• v.1 no.4
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• pp.371-382
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• 1986

Eh-jang (fermented aquatic products) of Asia can be classified 4 groups, those are Chot-kal (salted fish guts), Chot-kal Paste, Eh-ganjang (fish sauce) and Shic-hae (lactic acid fermented fish products). The native place of Eh-jang and rice culture is almost same and Eh-jang had been spread out all the area of Asia along with rice culture. Korea has variety of Chot-gal and consumes much Chot-gal that Korea is the culture area of both soybean sauce and Chot-gal. Eh-ganjang had been edible all area of Korea during Chosun Dynasty, but it remains only Southern part of Korea. Korean Chot-gal paste is produced as a form of Kon-chang-yi-chot. Korean Shic-hae had been edible all area of Korea during Chosun Dynasty, but remains at the east coast and some area of Hwang-hae Do and Kyung-sang-nam-do.