Korean Journal of Breeding Science

장수형 조숙 사일리지용 밀(Triticum aestivum L.) ‘조우’ Whole-crop Wheat Cultivar ‘Jou’ with Long Spikes and Early Maturity: Jae-Han Son, Kyeong-Min Kim, Changhyun Choi, Myoung-Goo Choi, Jun-Seuk Choi, Myoung-Hui Lee, Chon-Sik Kang; Korean. J. Breed. Sci. 2026;58(3):337-345. Published online September 1, 2026; DOI: https://doi.org/10.9787/KJBS.2026.58.3.337

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‘Jou’ is a new wheat (Triticum aestivum L.) cultivar developed by the Rural Development Administration for whole-crop forage with early maturity in 2023. To develop an early maturing forage wheat cultivar suitable for double cropping systems in Korea, an artificial cross was made in 2010 using ‘Taejoong,’ a tall cultivar with high biomass production, as the female parent and ‘Keumkang,’ an early maturing cultivar with superior agronomic traits, as the male parent. After bulk cultivation in Iksan, the pedigree was selected in Iksan and Wanju, and the early maturing tall line, IW2010145-B-B-44-1-5-2-5-1, was selected in 2018. ‘Jou’ exhibited favorable agronomic characteristics, including tolerance to lodging and fusarium head blight and high yield of whole-crop dry matter. The heading and harvest dates of ‘Jou’ were April 17 and May 17, respectively, which were similar to those of ‘Cheongwoo.’ ‘Jou’ had lower spike number per m² (752), and higher 1,000-grain weight (48.1 g) than those of ‘Cheongwoo’ (1,025, and 44.5 g, respectively). In the regional yield trial, the average whole-crop dry matter yield in paddy fields was 14.6 MT ha^-1. Although the harvest time of ‘Jou’ is slightly later than that of ‘Cheongwoo,’ it is a tall-type wheat cultivar with relatively early heading among tall cultivars, making it suitable for forage wheat cultivation (Registration No. 10756).

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밀 종실 단백질 함량 관련 양적형질유전자좌(QTL) 분석 및 마커 탐색 Quantitative Trait Loci for Grain Protein Content in Wheat (Triticum aestivum L.): Min-Ju Kim, Myoung-Goo Choi, Go-Eun Lee, Chon-Sik Kang, Chang-Hyun Choi, Jun-Seok Choi, Myoung-Hui Lee, Jae-Han Son; Korean. J. Breed. Sci. 2026;58(2):109-122.
Published online June 1, 2026; DOI: https://doi.org/10.9787/KJBS.2026.58.2.109

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Grain protein content (GPC) is a quantitative trait that strongly influences wheat processing quality and end-product performance, but is highly affected by environmental conditions. This study aimed to identify QTLs associated with GPC using Korean wheat resources and assess the usefulness of linked markers for selection. A recombinant inbred line (RIL) population (F₇ and F₈; n=359) derived from ‘Joongmo2008’ × ‘Joah’ was genotyped with a 35 K SNP array, and QTL mapping was conducted using 4,891 filtered SNPs. Six QTLs were detected, and a major QTL on chromosome 3 B (Qgpc-3B) was consistently identified in both generations. Within the Qgpc-3B interval, lines carrying the ‘Joongmo2008’ alleles at AX-95163812 and AX-94495360 showed higher GPC, and the same trend was confirmed by a two-marker haplotype analysis. The direction of marker effects was also reproduced in a Korean wheat germplasm panel, suggesting that these markers have strong potential as practical selection indices for improving GPC in wheat breeding programs.

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도복과 수발아에 강한 부분찰성 제빵용 밀( L.) “황금알” A Wheat Cultivar, “Hwanggeumal” with Good Bread Quality, Partial Waxy and Tolerance to Lodging and Pre-Harvest Sprouting: Kyeong-Min Kim, Kyeong-Hoon Kim, Changhyun Choi, Jinhee Park, Go-Eun Lee, Sun-Mok Yang, Chuloh Cho, Myoung-Hui Lee, Ki-Chang Jang, Chon-Sik Kang; Korean. J. Breed. Sci. 2023;55(3):272-280.
Published online September 1, 2023; DOI: https://doi.org/10.9787/KJBS.2023.55.3.272

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A new winter wheat (Triticum aestivum L.) cultivar “Hwanggeumal” was developed by the National Institute of Crop Science (NICS) Rular Development Administration (RDA) in 2019. Its heading date was April 20, and its maturity date was June 1, which was similar to that of Jokyung. “Hwanggeumal” had a shorter culm length (75 cm) and spike length (7.1 cm). However, it had lower spikes per m² (699) and 1,000-grain weight (44.2 g) than “Jokyung” (78 cm, 8.2 cm, 776, 46.6 g, respectively). “Hwanggeumal” displayed stronger winter hardiness than “Jokyung”, and was susceptible to powdery mildew (PM) and fusarium head blight (FHB). The average grain yield in the advanced yield trial (AYT) was 6.20 MT/ha, which was 11% more than “Jokyung”. In the regional yield trial (RYT) it was 5.13 MT/ha in upland and 4.77 MT/ha in paddy field, which were 16% and 13% less than “Jokyung”, respectively. “Hwanggeumal”s flour yield (71.4%) and flour lightness (91.82) was similar to that of “Jokyung”, while the protein content (14.0%), gluten content (10.3%), and SDS-sedimentation volume (60.3 ml) were higher than that of “Jokyung”. These results display that the “Hwanggeumal” dough strength of flour is stronger than “Jokyung”. High molecular weight gluten subunit (HMW-GS) composition is Glu-D1d (5+10), the granule-bound starch synthase (GBSS) composition are Wx-A1a, Wx-B1b, and Wx-D1a, and the composition of puroindolines are Pina-D1a and Pinb-D1b (Registration No. 9173).

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A Wheat Cultivar, “Joongmo2015” with Good Noodles Quality, White Grain Wheat, Higher Winter Hardiness and Adaptable Paddy Culture
Kyeong-Min Kim, Changhyun Choi, Jinhee Park, Go-Eun Lee, Han-Yong Jeong, Chuloh Cho, Yu-rim Kim, Myoung-Goo Choi, Mira Yoon, Sookjin Kim, Chon-Sik Kang
Korean Journal of Breeding Science.2024; 56(3): 371. CrossRef

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흰가루병 저항성 밀 유전 육종 주요 연구동향 Research Advances in Wheat Breeding and Genetics for Powdery Mildew Resistance: Myoung-Hui Lee, Sumin Hong, Kyeong-Min Kim, Yurim Kim, Sun-Hwa Kwak, Kyeong-Hoon Kim, Chon-Sik Kang, Chul Soo Park, Youngjun Mo, Changhyun Choi; Korean. J. Breed. Sci. 2023;55(3):218-243.
Published online September 1, 2023; DOI: https://doi.org/10.9787/KJBS.2023.55.3.218

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Powdery mildew (Blumeria graminis f. sp. tritici) significantly affects wheat yield and flour quality. Plant resistance to powdery mildew has been investigated for decades, and numerous resistance genes and quantitative trait loci (QTLs) for molecular markers have been discovered. In Korea, powdery mildew occurs initially in spring, due to frequent rain and low temperatures, becoming severe during the harvest season. In Korea, systematic monitoring and quantitative and qualitative impact assessments of powdery mildew outbreaks have never been conducted properly. Herein, the lifecycle of powdery mildew, resistance genes, QTLs, and selection markers in wheat were examined to elucidate powdery mildew resistance, develop resistant varieties, and genetic markers suitable for the domestic environment.

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Current Trends in Wheat Breeding Strategies for Developing Domestic Wheat Cultivars in Korea
Hajeong Kang, Hyoun-Min Park, San-Gu Lee, Eun-Ha Kim, Muhammad Imran, Hanyoung Choi, Myeong-Ji Kim, Seonwoo Oh
Korean Journal of Breeding Science.2024; 56(4): 491. CrossRef

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밀 붉은곰팡이병 저항성 유전 육종 주요 연구동향 Research Advances in Wheat Breeding and Genetics for Fusarium Head Blight Resistance: Myoung-Hui Lee, Sumin Hong, Kyeong-Min Kim, Sun-Hwa Kwak, Changhyun Choi, Chon-Sik Kang, Chul Soo Park, Youngjun Mo, Kyeong-Hoon Kim; Korean. J. Breed. Sci. 2023;55(3):195-217.
Published online September 1, 2023; DOI: https://doi.org/10.9787/KJBS.2023.55.3.195

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Fusarium head blight (FHB) is a severe disease of wheat, mainly caused by Fusarium graminearum, which greatly reduces wheat production and directly affects human and animal health due to the mycotoxins produced in wheat grains. To develop high-quality, stable yields, and mycotoxin-free crop, it is essential to first understand the genetic basis of wheat FHB-resistance, and to design molecular markers facilitating the selection of FHB-resistant varieties. However, despite extensive global research efforts, genetic research and marker development for the selection of FHB-resistant varieties, in Korea, are insufficient. Here, we summarize recent studies on FHB-resistance genes, resistance resources, quantitative trait locus analysis, and genome-wide association studies to enhance our understanding of FHB and the breeding of FHB-resistant domestic wheat cultivars.

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Assessment of Fusarium Head Blight Resistance Genes in Domestic Wheat Varieties
Myoung Hui Lee, Changhyun Choi, Sumin Hong, Chon-Sik Kang, Mira Yoon, Ki-Chang Jang, Chul Soo Park, Kyeong-Min Kim
Korean Journal of Breeding Science.2024; 56(3): 205. CrossRef
Current Trends in Wheat Breeding Strategies for Developing Domestic Wheat Cultivars in Korea
Hajeong Kang, Hyoun-Min Park, San-Gu Lee, Eun-Ha Kim, Muhammad Imran, Hanyoung Choi, Myeong-Ji Kim, Seonwoo Oh
Korean Journal of Breeding Science.2024; 56(4): 491. CrossRef
Survey of Fungal Diseases on Barley, Wheat, and Oats at Tillering to Stem Extension Stages in Southern Regions of Korea during 2020-2021
Min-Hye Jeong, Eu Ddeum Choi, Seol-Hwa Jang, Sunmin An, Miju Jo, Seoyeon Kim, Sang-Min Kim, Sook-Young Park
Research in Plant Disease.2024; 30(3): 207. CrossRef