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"Jun-Seuk Choi"

New Cultivar Developed
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
‘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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