qBK1 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
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Bakanae disease, caused by various Fusarium species, poses a significant threatto global rice production, with its incidence increasing in major rice-producing regions. Currently, no rice varieties exhibit complete resistance to this disease. Enhancing resistancein rice cultivars could serve as a cost-effective and sustainable alternative to fungicideapplication. Developing resistant rice varieties may offer a practical solution to mitigateyield losses and reduce dependency on chemical treatments. ‘Jinokchal’ was derived fromthe cross between ‘Milyang299’, which harbors bakanae disease-resistant QTL qBK1. and‘Baekokchal’ in 2014. A promising line, YR31624-5B-2, was then selected and designatedas ‘Milyang366’ in 2019. The local adaptability test of ‘Milyang366’ was conducted at fivelocations from 2020 to 2022, and the cultivar was subsequently named ‘Jinokchal. ’ Theheading 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 ofbrown rice is 22.7 g, which is heavier than that of ‘Sinseonchalbyeo’. This variety is resistantto blast, rice stripe virus, and bacterial blight, but susceptible to insect pests. The yieldpotential of ‘Jinokchal’ was approximately 497 kg/10a at the ordinary fertilizer level in thelocal adaptability test over three years. ‘Jinokchal’ is moderately resistant to bakanae diseaseand harbors the qBK1 gene derived from the tong-il type rice ‘Shingwang’ (Registration No. 8135).
Abstract
Bakanae disease, caused by various Fusarium species, poses a significant threatto global rice production, with its incidence increasing in major rice-producing regions. Currently, no rice varieties exhibit complete resistance to this disease. Enhancing resistancein rice cultivars could serve as a cost-effective and sustainable alternative to fungicideapplication. Developing resistant rice varieties may offer a practical solution to mitigateyield losses and reduce dependency on chemical treatments. ‘Jinokchal’ was derived fromthe cross between ‘Milyang299’, which harbors bakanae disease-resistant QTL qBK1. and‘Baekokchal’ in 2014. A promising line, YR31624-5B-2, was then selected and designatedas ‘Milyang366’ in 2019. The local adaptability test of ‘Milyang366’ was conducted at fivelocations from 2020 to 2022, and the cultivar was subsequently named ‘Jinokchal. ’ Theheading 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 ofbrown rice is 22.7 g, which is heavier than that of ‘Sinseonchalbyeo’. This variety is resistantto blast, rice stripe virus, and bacterial blight, but susceptible to insect pests. The yieldpotential of ‘Jinokchal’ was approximately 497 kg/10a at the ordinary fertilizer level in thelocal adaptability test over three years. ‘Jinokchal’ is moderately resistant to bakanae diseaseand harbors the qBK1 gene derived from the tong-il type rice ‘Shingwang’ (Registration No. 8135).