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"Jisu Choi"

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유전자 보유 키다리병 중도저항성 중만생 내도복 다수성 찰벼 신품종 ‘진옥(眞玉)찰’
Development of a Mid-late Glutinous Rice Cultivar. ‘Jinokchal,’ a Variety Resistant to Bakanae Disease Harboring the qBK1 Gene
Sumin Jo, Ju-Won Kang, Ji-Yoon Lee, Jun-Hyeon Cho, Yeongho Kwon, So-Myeong Lee, Jisu Choi, Jong-min Jeong, Woo-Jae Kim, Jong-Hee Lee, Dong-Soo Park
Korean. J. Breed. Sci. 2025;57(3):271-278.
Published online September 1, 2025
DOI: https://doi.org/10.9787/KJBS.2025.57.3.271

Bakanae disease, caused by various Fusarium species, poses a significant threat to global rice production, with its incidence increasing in major rice-producing regions. Currently, no rice varieties exhibit complete resistance to this disease. Enhancing resistance in rice cultivars could serve as a cost-effective and sustainable alternative to fungicide application. Developing resistant rice varieties may offer a practical solution to mitigate yield losses and reduce dependency on chemical treatments. ‘Jinokchal’ was derived from the cross between ‘Milyang299’, which harbors bakanae disease-resistant QTL qBK1. and ‘Baekokchal’ in 2014. A promising line, YR31624-5B-2, was then selected and designated as ‘Milyang366’ in 2019. The local adaptability test of ‘Milyang366’ was conducted at five locations from 2020 to 2022, and the cultivar was subsequently named ‘Jinokchal. ’ The heading date of ‘Jinokchal’ was August 13, classifying it as a medium-late maturing cultivar. The culm was 77 cm long and had 108 spikelets per panicle. The 1,000 grain-weight of brown rice is 22.7 g, which is heavier than that of ‘Sinseonchalbyeo’. This variety is resistant to blast, rice stripe virus, and bacterial blight, but susceptible to insect pests. The yield potential of ‘Jinokchal’ was approximately 497 kg/10a at the ordinary fertilizer level in the local adaptability test over three years. ‘Jinokchal’ is moderately resistant to bakanae disease and harbors the qBK1 gene derived from the tong-il type rice ‘Shingwang’ (Registration No. 8135).

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