• Original Research Article

    Breeding of Rice Stripe Virus (RSV)-Resistant Near-Isogenic Lines Using Rapid Generation Advance (RGA) and Marker-Assisted Backcrossing (MABC)
    Seung-Kyo Jeong, So-Myeong Lee, Youngho Kwon, Ju-Won Kang, Sumin Jo, Chanjeong Jeon, Jin-Kyung Cha, Hyeonjin Park, Ye Rin An, Ju-Young Choi, Ji-Min Kim, Woo-Jae Kim, Jong-Min Jeong, Jong-Hee Lee
    The rice stripe virus (RSV) is a major constraint on japonica rice production in East Asia, and its distribution is expanding northward … + READ MORE
    The rice stripe virus (RSV) is a major constraint on japonica rice production in East Asia, and its distribution is expanding northward with climate warming. To develop RSV-resistant near-isogenic lines (NILs) for the susceptible cultivar, Odae, we integrated marker-assisted backcrossing (MABC) with a rapid generation advance (RGA) system. The resistant donor Haedamssal, which carries Stvb-i, was crossed with Odae, and foreground selection using the InDel7 marker and background selection with 116 Kompetitive Allele-Specific PCR (KASP) markers were performed. In the BC2F2 generation, the mean recurrent-parent genome recovery was 79.8%, and lines with a thousand-grain weight ≥25 g were selected. Agronomic and disease evaluations identified line YR33079-1-3, designated ‘Milyang397,’ which showed strong RSV resistance comparable to Haedamssal while retaining the agronomic and grain-quality traits of Odae. These results demonstrate that combining MABC with RGA enables the efficient development of high-recovery NILs within a shortened breeding cycle and provides a robust platform for validating and introgressing RSV resistance genes in early-maturing japonica rice. - COLLAPSE
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    1 June 2026

  • Original Research Article

    Analysis of Growth and Yield Variation of Sprout Soybeans by Sowing Date in Central Northern Inland and Southern Coastal Regions in Response to Climate Change

    기후변화 대응 중북부 내륙 및 남부해안 지역 나물콩의 파종 시기에 따른 생육 및 수량 변이 분석

    Se Eun Chae, Ji Ae Lee, Seung Ho Jeon

    채세은, 이지애, 전승호

    In this study, we evaluated the effects of sowing dates on the growth and yield of sprout soybeans (Glycine max L.) … + READ MORE
    In this study, we evaluated the effects of sowing dates on the growth and yield of sprout soybeans (Glycine max L.) to establish stable cultivation strategies under climate change in the north-central inland (Chuncheon) and southern coastal (Suncheon) regions of Korea. Two cultivars, ‘Aram’ and ‘Pungsannamulkong’, were evaluated over two years (2023-2024) across four sowing dates: late May, early June, mid-June, and late June. The results indicated that delayed sowing significantly reduced accumulated temperature during vegetative and reproductive stages in both the regions. Growth traits at the flowering stage and the lodging index also decreased as sowing was delayed. In Chuncheon, ‘Aram’ achieved its highest yields in mid-June 2023 (343 kg/10a) and early June 2024 (225 kg/10a), while ‘Pungsannamulkong’ performed best with early to mid-June sowing (over 330 kg/10a). In contrast, yields in Suncheon for both cultivars increased with delayed sowing. ‘Aram’ reached maximum yields of 357 and 290 kg/10a in late June, while ‘Pungsannamulkong’ followed a similar trend with peak yields of 383 and 325 kg/10a in 2023 and 2024, respectively. Consequently, the observed yield variations between Chuncheon and Suncheon, despite identical sowing dates, may be attributed to differences in temperature and photoperiod conditions resulting from latitudinal variations, which induced distinct growth patterns. Therefore, the optimal sowing window to ensure stable cultivation and enhance the productivity of sprout soybeans in response to climate change is early to mid-June for the Chuncheon region and late June for the Suncheon region. - COLLAPSE
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    1 June 2026

  • Original Research Article

    Analysis of Suitable and Marginal Areas for Domestic Wheat Cultivation Using Seed Supply and Farm Survey Data
    Hyun Hwa Park, Pyae Pyae Win, Hoon Hwangbo, Yong In Kuk
    In this study, we analyzed the spatial distribution, varietal composition, and suitable cultivation areas of domestic wheat using certified seed supply and … + READ MORE
    In this study, we analyzed the spatial distribution, varietal composition, and suitable cultivation areas of domestic wheat using certified seed supply and farm survey data. Using seed supply data from 2023 and 2024, we analyzed the distribution of cultivation areas, cultivation boundaries, and varietal characteristics. In addition, the farm surveys conducted in 2024 and 2025 evaluated the cultivation status, sowing periods, and yield characteristics. Analysis of the seed supply data revealed that wheat cultivation has expanded to most cities and counties nationwide, with seeds supplied to 120 cities/counties (325 farms) in 2023 and to 117 cities/counties (263 farms) in 2024. In particular, cultivation areas expanded to the northern part of Gangwon Province in 2024, indicating an extended cultivation potential. Although the Jeonnam and Jeonbuk regions remained the main production centers, as intermediate levels of seed supply spread to other regions, the spatial diversity of the cultivation areas increased. By variety, ‘Saekumkang’ accounted for the highest proportion nationwide, while ‘Baekgang’ and ‘Kumkang’ exhibited region-specific distributions. According to farm surveys, in 2024, the ‘Saekumkang’ variety accounted for more than 50 % of the total cultivation and remained the dominant variety in 2025. However, the cultivation shares of certain other varieties increased, leading to a slight expansion of varietal diversity. Sowing periods differed among the regions, with earlier sowing in colder (G1) and relatively later sowing in warmer (G2 and G3) regions. The yields in the G2 and G3 regions were higher, whereas the G1 region exhibited lower and more variable yields. Based on spatial analysis, we categorized these cultivation areas into marginal (G1), conditional (G2), and suitable (G3) areas. Due to low winter temperatures and frequent winter injuries, we recognized the northern area as marginal, while we determined the southern area as the most appropriate for stable production. We analyzed the transitional zones (G2) as regions with unstable production depending on the climatic conditions of the year, potentially becoming suitable cultivation areas under future climate change conditions. In summary, appropriate regions for wheat cultivation in Korea increase from north to south with rising temperature conditions. These results could provide basic data to establish region-based cultivation strategies and respond to climate change. - COLLAPSE
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    1 June 2026

  • Original Research Article

    Effects of Root-Zone Pressurized Aeration Using the Growide System on Medical Cannabis (Cannabis sativa L.) Growth Characteristics and Yield

    근권부 가압 공기 공급 기술(Growide)을 통한 근권부 공기압 처리가 의료용 대마(Cannabis sativa L.)의 생육 특성 및 수량에 미치는 영향

    Bumsik Choi, Mijin Gwon, Hoeyeong Jeong, Jinwoong Cho, Yeongmi Jang

    최범식, 권미진, 정회영, 조진웅, 장영미

    In this study, we evaluated how root-zone air-pressure supply using the Growide system affects medical cannabis (Cannabis sativa L.) growth and … + READ MORE
    In this study, we evaluated how root-zone air-pressure supply using the Growide system affects medical cannabis (Cannabis sativa L.) growth and productivity, cultivated in a soil-based cultivation system. We conducted the experiment from April to August 2024 in a smart-container cultivation facility in Andong, the Republic of Korea, using three cultivars (i.e., VB1, VB4, and VB5). We applied air-pressure treatment by periodically supplying compressed air to the lower part of the cultivation modules, while we maintained untreated plants under identical conditions. All cultivars displayed high germination rates ranging from 88.0% to 100.0%. In general, plant height decreased under air-pressure treatment, whereas leaf and flower numbers increased during the cultivation period. Growth curves of plant height and leaf number followed a typical sigmoidal pattern, whereas flower number exhibited a delayed sigmoidal growth pattern with a distinct lag phase. We successfully fitted all growth curves using a three-parameter logistic model with high coefficients of determination (R2). Two-way ANOVA indicated that cultivar effects on plant height were significant at most observation dates, whereas treatment effects were significant only at several time points. In contrast, air-pressure treatment significantly increased flower number throughout the reproductive stage (p < 0.001), with VB4 and VB5 exhibiting greater responsiveness than VB1, yielding significant cultivar × treatment interactions during the later growth period. Concerning yield traits, we observed significant cultivar effects for fresh flower weight, though these treatment effects were not statistically significant. However, for dry flower weight, both cultivar (p = 0.001) and treatment (p = 0.003) effects were statistically highly significant, exhibiting a consistent increase in dry biomass across all cultivars under air-pressure treatment, particularly in VB4 and VB5. In summary, our results suggest that root zone air-pressure supply enhances reproductive growth and dry biomass accumulation more strongly than vegetative growth in medical cannabis, heavily influenced by cultivar-specific characteristics. Further studies addressing root physiological mechanisms and cannabinoid profiles are warranted to optimize related system conditions. - COLLAPSE
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    1 June 2026

  • Original Research Article

    Protein quality and functional component analysis of oat hydrolysate powder

    귀리 가수분해 분말의 단백질 품질특성 및 기능성분 분석

    Hae-Won Park, Ha Young Park, Yu-Young Lee, Jeongnam Lee, Narae Han

    박해원, 박하영, 이유영, 이정남, 한나래

    This study assessed the effects of enzymatic hydrolysis and subsequent processing on the protein quality and functional properties of oats (Avena … + READ MORE
    This study assessed the effects of enzymatic hydrolysis and subsequent processing on the protein quality and functional properties of oats (Avena sativa L. cv. ‘Daeyang’) for its potential application as a plant-based protein. Samples included untreated oat (Control), concentrated oat hydrolysate (COH), clarified hydrolysate powder (CHP), and non-clarified hydrolysate powder (NCHP). Crude protein content was reduced in COH and CHP groups, whereas NCHP group maintained protein content comparable to that of the Control group. Additionally, total amino acid and branched-chain amino acid contents were relatively well preserved in the NCHP. Lysine was identified as the first-limiting amino acid in all samples. Although in vitro digestibility slightly reduced after enzymatic hydrolysis and subsequent processing, all treated samples retained relatively high digestibility values. The highest protein digestibility-corrected amino acid score was observed for NCHP (0.42). Total avenanthramide content was highest in NCHP (308.79 µg/g DW) and lowest in COH. In contrast, total polyphenol and flavonoid contents, along with antioxidant activities, were the highest in CHP. Overall, enzymatic hydrolysis and subsequent processing differentially affected the nutritional and functional characteristics of oats. NCHP exhibited superior protein quality and higher levels of oat-specific functional compounds, whereas CHP exhibited superior antioxidant properties. These findings indicate that the processing conditions following enzymatic hydrolysis can be strategically Controlled to develop oat-based functional ingredients with targeted nutritional and functional properties. - COLLAPSE
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    1 June 2026
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