‘Ganghan’ is a high-yielding soybean (Glycine max L. Merrill) cultivar developed for improved shattering resistance and suitability for mechanized harvesting. It was bred through pedigree selection after an artificial cross between ‘Taeseon’ (female parent) and ‘Cheonga’ (male parent) in 2015. ‘Ganghan’ is a determinate type with an average main stem length of 65 cm and first pod height of 19.6 cm, which is favorable for mechanical harvesting. Compared to the control cultivar ‘Daewonkong,’ it showed stronger lodging tolerance and carried a genetic allele associated with pod shattering resistance. In disease resistance evaluations, it exhibited higher resistance than ‘Daewonkong’ to soybean mosaic virus (G6H), bacterial pustule, and black root rot. Regarding seed quality, it contained 38.8% protein, 17.6% oil, 86.1% unsaturated fatty acids, and 3,124 μg/g total isoflavones. The tofu yield was 232%, with mechanical properties and color comparable to ‘Daewonkong.’ In fermentation processing tests, ‘Ganghan’ recorded a γ-PGA content of 11.4 mg/g and amino nitrogen content of 390 mg%, indicating potential use in traditional fermented soy foods. In regional yield trials (RYT) conducted across 10 locations from 2020 to 2022, ‘Ganghan’ had an average yield of 3.58 tons/ha, 14% higher than that of ‘Daewonkong’. The adoption and expansion of ‘Ganghan’ is expected to contribute to increased domestic soybean productivity, harvest efficiency, and cultivation stability under changing climate conditions, thereby improving the domestic soybean self-sufficiency rate (Registration No. 10459).

Bacterial pustule is a major bacterial disease in most soybean-growing regions of Korea, resulting in soybean yield reductions of up to 60%. In this study, we aimed to understand the differences in disease severity caused by three strains of Xanthomonas citri pv. glycines, including two newly differentiated strains (K29 and K100) and the conventional representative strain, 8ra. Seventeen major soybean cultivars and 14 breeding lines were inoculated and compared for their reactions to the three strains of Xcg. The two new strains caused higher levels of disease severity, resulting in a greater number of susceptible cultivars. The landrace PI 547711, like Williams 82, was highly resistant to all Xcg strains; however, the other six cultivars that were resistant to 8ra, including Daepung2, were susceptible to the new strains (K29 and K100). In particular, the most widely grown cultivars, Daewon and Daepung2, were highly susceptible to K100. All of the breeding lines except two were also vulnerable to the new strains, K100 and K29. Of the breeding lines, SS05004-1-1-4-2-3-4 and SS05022-5-4-2-4-4-4 were resistant to the three Xcg strains, at similar levels to that of Williams 82. The breeding lines and cultivars evaluated in this study may be used to develop breeding materials resistant to new Xcg strains in the future. In addition, establishment of an improved disease evaluation system for bacterial pustule, by using multiple representative strains, is strongly recommended for breeding programs, to increase the efficiency and accuracy of selection for resistance as the pathogenic diversity of X. citri pv. glycines changes.

A new mung bean cultivar, Vigna radiata (L.) R. Wilczek ‘Samhwang’, was derived from a cross between ‘Samgang’ and ‘KM9901-3B-15-2-4’ obtained in 2006 and developed at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2014. ‘Samhwang’ has an erect growth habit, lobed leaflets, green hypocotyls, light yellow corolla, and a dull yellow seed surface. Its stem length was 64 cm, 5 cm shorter than that of the control cultivar ‘Owool’. The 1000-seed weight was 53 g, i.e., 4 g heavier than that of ‘Owool’. ‘Samhwang’ exhibited similar field resistance to mung bean mottle virus, cercospora leaf spot, powdery mildew, and lodging when compared with that of the control cultivar. The sprout yield ratio and hard seed rate were the same as those of ‘Owool’. The average seed yield of ‘Samhwang’ was 1.76 ton/ha, which was 14% greater than that of ‘Owool’ (Registration No. 5877).

Baekgeumok, a sweet corn hybrid made by crossing inbred KSE15 and KSE21, was developed by the maize breeding team at the National Institute of Crop Science, Rural Development Administration in 2015. Baekgeumok silks at 63 days, similar to Danok3 (check variety). The plant height is 179 cm, higher than check variety, and the ear height is 105 cm, similar to check variety. Baekgeumok has an excellent lodging resistance. The fresh ear yields were 6,411 ears and 1,141 kg in 10 a. Pericarp thickness was 39 µm and sugar content was 19.5 °Bx. Sensory evaluation value was 6.1 and flavor was excellent. This hybrid can be cultivated in Gyeonggi-do, Gangwon-do, Chungcheongbuk-do, Gyeongsangbuk-do, and Gyeongsangnam-do. Seeds of Baekgeumok must be renewed annually, because this hybrid is a single cross hybrid. This sweet corn hybrid must be cultivated at least 200 m from areas with other corn varieties, because of their recessive gene. When cultivated at high density, the ear size and ratio of kernel set length / ear length will be lower in this hybrid than in standard cultivars. This hybrid requires pest control because it is susceptible to corn borer infestation. Drainage management is important in the rainy season. (Registration No. 6725)

A mungbean (Vigna radiata (L.) Wilczek) cultivar Jinhwang was derived from a cross between Samgang and KM9901-3B-15-2-4 and developed at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2013. Jinhwang has an erect growth habit, heart leaflets, green hypocotyls, light yellow corolla, and a dull yellow seed surface. The stem length of Jinhwang was 61 cm, which was 5 cm shorter than that of the control cultivar Owool. The 1000-seed weight was 52 g, which was 3 g heavier than that of Owool. Jinhwang has similar field resistance to mungbean mottle virus, cercospora leaf spot, powdery mildew, and lodging to the control cultivar. The hard seed rate of Jinhwang was 6.2%, which was 1.8%p higher than that of Owool. The sprout yield ratio was the same as that of the control cultivar. The average seed yield of Jinhwang was 1.68 ton/ha, which was 5% greater than that of Owool. (Registration No. 5873)

A cowpea cultivar Vigna unguiculata L. Walp ‘Seonhyeon’ is a cross species between V. unguiculata ‘IT145373’ and V. unguiculata ‘IT101362’ developed at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2017. ‘Seonhyeon’ is an erect plant with an intermediate plant habit, green hypocotyls, light purple-colored corolla, heart-shaped leaflets, black seed surface, and straight, brown mature pods. The anthocyanin content of ‘Seonhyeon’ was 1,632 µg/g, and it contained seven anthocyanins, including cyanidin-3-glucoside and delphinidin-3-glucoside. The stem length of ‘Seonhyeon’ was 54 cm, which was 13 cm longer than that of the control cultivar ‘Okdang’. Its 100-seed weight was 11.8 g, which was 3.6 g lighter than that of the control cultivar. Field resistance of ‘Seonhyeon’ to leaf and systemic diseases was similar to that of the control cultivar, whereas its field resistance to lodging was slightly lower compared to that of the control cultivar. The average yield of ‘Seonhyeon’ was 2.26 ton/ha, which was 15% higher compared to that of control cultivar. Black seed coat of the ‘Seonhyeon’ cultivar is expected to contribute to species specialization as well as to development of various processed products. (Registration number: 7499)

A mungbean cultivar ‘Areum’ (Vigna radiata (L.) Wilczek) was derived from a cross between ‘Samgang’ and ‘KM9901-3B-15-2-4’ at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2013. ‘Areum’ has an erect growth habit, lobed leaflet, green hypocotyls, light yellow corolla, and a dull green seed surface. Its stem length is 61 cm, which is 5 cm shorter than that of the control cultivar ‘Owool’. The 1000-seed weight is 51 g, which is 2 g heavier than that of ‘Owool’. Its field resistance to mungbean mottle virus, cercospora leaf spot, and powdery mildew is similar to that of the control cultivar, whereas its field resistance to lodging is marginally weaker. The hard seed rate of ‘Areum’ is 6.81%, which is 2.49% higher than that of ‘Owool’. The sprout yield ratio is 7.09, which is similar to that of the control cultivar. The average yield of ‘Areum’ is 1.79 ton/ha, which is 12% more than that of ‘Owool’. (Cultivar registration number: 5876).

A mungbean cultivar “Munpyeong” (Vigna radiata (L.) Wilczek) was derived as a cross between “Keumseong” and “IT163157” at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2013. “Munpyeong” has an erect growth habit, heart leaflet, green hypocotyls, black and straight pods when matured, and a dull green seed surface. The stem length of “Munpyeong” was 60 cm, which was 6 cm shorter than that of the control cultivar “Owool.” The pod number per plant was 25, which was 3 more than that of the control cultivar. The 1000 seed weight of “Munpyeong” was 45 g, which was 4 g lighter than that of the control cultivar “Owool.” Its field resistance to mungbean mottle virus, cercospora leaf spot, and powdery mildew are similar to the control cultivar, whereas its field resistance to lodging was slightly stronger. The hard seed rate of “Munpyeong” was 3.2%, which was similar to that of the control cultivar. The sprout yield ratio was 7.54 times, which was 9% more than that of the control cultivar. The average yield of “Munpyeong” was 1.93 ton/ha, which was 21% more than that of the control cultivar “Owool” (Cultivar registration number: 5878).

A mungbean variety ‘Suhyeon’ (Vigna radiata (L.) Wilczek) was derived from the cross between ‘Jeonnam14’ and ‘IT208777’ at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2010. ‘Suhyeon’ has erect growth habit, heart leaflet, green hypocotyl, black and straight pod when matured, and dull green seed surface. The stem length of ‘Suhyeon’ was 66 ㎝, which was 5 ㎝ less than check variety ‘Owool’. The pods number per plant of ‘Suhyeon’ was 24, which was 5 more than check variety. The sprout yield ratio of ‘Suhyeon’ was 8.67 times, which was 16% more than check variety. The contents of starch, protein and fatty acid of seed were 62.7, 27.3, 1.89%, respectively. The average yield of ‘Suhyeon’ was 1.74 ton/㏊, which increased 8% more than that of check variety. (Variety registration number: 5107)

A mungbean cultivar ‘Sanpo’ (Vigna radiata (L.) Wilczek) was derived from the cross between SM9710-3B-7 and Jangannogdu at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2012. ‘Sanpo’ has erect growth habit, green hypocotyls, heart leaflet, dull green seed surface, and black and straight pod when matured. The stem length of ‘Sanpo’ were 71㎝, which was 5㎝ longer than check cultivar ‘Owool’. The pods number per plant, the seeds number per pod, and the seed weight of ‘Sanpo’ are similar to check cultivar. It has field resistance to cercospora leaf spot, mungbean mottle virus, and powdery mildew. In addition, ‘Sanpo’ has high lodging resistance. The hard seed rate of ‘Sanpo’ was 2.4%, which was 0.8%point lower than check cultivar. The sprout yield ratio of ‘Sanpo’ was 8.26 times, which was 10% (77%point) more than check cultivar. The average yield of ‘Sanpo’ was 1.62ton/㏊, which was 14% more than the check cultivar ‘Owool’. (Cultivar registration number: 5250)

‘Sinhwangok’, a new maize F₁ hybrid (Zea mays L.), is developed by the maize breeding team at the National Institute of Crop Science (NICS), RDA in 2015. The high-yielding hybrid, named ‘Sinhwangok’ was bred by crossing between two inbred lines, ‘KS178’ and ‘KS145’. It is a yellow dent maize hybrid. After advanced yield trial of ‘Sinhwangok’ in Suwon for two years, regional yield trial was subsequently carried out for evaluation of its growth and yield at three different locations from 2012 to 2015. The days to silking of ‘Sinhwangok’ are 74. The plant height of ‘Sinhwangok’ is 241cm, similar to ‘Jangdaok’, and its ear height ratio is 51%, similar with that of ‘Jangdaok’. It has resistance to lodging. The number of ear per 100 plants is 96. The ear length of ‘Sinhwangok’ is 17cm, shorter than that of ‘Jangdaok’. The weight of 100 seeds of ‘Sinhwangok’ is 34.1g, similar to that of ‘Jangdaok’. It has moderate resistance to southern leaf blight (Bipolaris maydis). It has moderate resistance to European Corn Borer (Ostrinia nubilalis). The grain yield (8.9 ton/ha) of ‘Sinhwangok’ was 15% higher than that of ‘Jangdaok’. The seed production of ‘Sinhwangok’ was acceptable due to a good synchronization of flowering period during crossing between the seed parent, KS178, and the pollen parent, KS145, in Yeongwol and F₁ seed yield was 2.3 ton/ha. ‘Sinhwangok’ would be a suitable cultivar to all plain area in Korea.

A soybean cultivar for sprout, ‘Joyang 1’ was developed at the National Institute of Crop Science (NICS) in 2010. ‘Joyang 1’ (Iksan67) was released by pedigree selection from the cross between high yielding ‘Pungsannamulkong’ and ‘Suwon187’ tolerant to lodging and disease. It has purple flower, lanceolate leaf, grey pubescence and small yellow seed. Weight of hundred seed is 11.6gram. Maturing date of ‘Joyang 1’ is ten days earlier than check cultivar, ‘Pungsannamulkong’. ‘Joyang 1’ is resistant to bacterial pustule and shattering. It have similar tolerance to root rot and seed spot to check cultivar. It shows high germination ratio, less abnormal germination and hard seed. Sprout yield also 11 percent higher than check cultivar. The average seed yield of ‘Joyang 1’ was 3.03 ton per hectare in the regional yield trials (RYT) carried out for three years from 2008 to 2010 which was 3 percent higher than the check cultivar. The number of breeder’s right is ‘4900’.