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Huiyou Aolong Silmiao

An indica three-line hybrid rice variety. When grown as a single-season medium-duration rice in the upper Yangtze River region, its total growth period is 148.3 days, 2.4 days earlier than the control F You 498. Plant height is 110.0 cm, panicle length 25.2 cm, with 148,000 effective panicles per mu; each panicle bears 171.5 grains, with a seed-setting rate of 87.8% and a 1,000-grain weight of 27.9 g. Resistance: the comprehensive blast disease index over two years was 5.1 and 6.0, respectively; panicle-neck blast damage reached the highest level of 7; brown planthopper resistance was rated at level 9; heat tolerance at level 3; cold tolerance at level 7. The variety is susceptible to blast, highly susceptible to brown planthopper, moderately tolerant to blast, highly tolerant to brown planthopper, relatively tolerant to heat, but less tolerant to cold. Major grain quality parameters: brown-rice yield 79.7%, milled-rice yield 66.2%, grain length 6.4 mm, length-to-width ratio 3.5, chalkiness 2.0%, translucency grade 1, alkali-nitrogen absorption value 6.0, gel consistency 62 mm, and amylose content 16.6%, meeting the Grade II standard stipulated in the agricultural industry standard “Quality of Edible Rice Varieties” (NY/T 593–2013). When grown as a double-cropping late-season rice in South China, its total growth period is 110.3 days, 4.5 days earlier than the control Boyou 998. Plant height is 104.9 cm, panicle length 23.2 cm, with 164,000 effective panicles per mu; each panicle bears 170.6 grains, with a seed-setting rate of 82.0% and a 1,000-grain weight of 23.7 g. Resistance: the comprehensive blast disease index over two years was 4.0 and 6.0, respectively; panicle-neck blast damage reached the highest level of 5; bacterial leaf blight at level 9; brown planthopper at level 9. The variety is highly susceptible to bacterial leaf blight and brown planthopper, and moderately susceptible to blast. Major grain quality parameters: milled-rice yield 69%, chalkiness 0.7%, amylose content 15.2%, gel consistency 75 mm, alkali-nitrogen absorption value 7, and length-to-width ratio 3.1, meeting the Grade I standard stipulated in the agricultural industry standard “Quality of Edible Rice Varieties.”

Qiang Liang You Aoxiang Simiao

A indica-type two-line hybrid rice variety. When grown as a single-season mid-season rice in the middle and lower reaches of the Yangtze River, its total growth period is 130.1 days, 4.1 days earlier than the control Fengliangyou No. 4. Plant height is 110.3 cm, panicle length 25.3 cm, with 164,000 effective panicles per mu; each panicle bears 197.9 grains, with a seed-setting rate of 86.0% and a 1,000-grain weight of 23.9 g. Resistance: the comprehensive blast disease index over two years was 4.6 and 2.4, respectively; panicle-neck blast caused damage at the highest level of 7; bacterial leaf blight at level 9; brown planthopper at level 9. The variety is highly susceptible to bacterial leaf blight and brown planthopper, moderately susceptible to blast, and exhibits strong heat tolerance during heading. Key grain quality parameters: milled rice recovery rate 60.0%, degree of chalkiness 2.8%, amylose content 15.9%, gel consistency 62 mm, alkali digestion value 6.2, and length-to-width ratio 4.3, meeting the Grade II standard of the agricultural industry’s “Quality Standards for Edible Rice Varieties.” When grown as a double-cropping late-season rice in South China, its total growth period is 112.8 days, 2 days earlier than the control Boyou 998. Plant height is 109.1 cm, panicle length 23.4 cm, with 164,000 effective panicles per mu; each panicle bears 168.8 grains, with a seed-setting rate of 81.8% and a 1,000-grain weight of 24.1 g. Resistance: the comprehensive blast disease index over two years was 4.4 and 5.2, respectively; panicle-neck blast caused damage at the highest level of 5; bacterial leaf blight at level 9; brown planthopper at level 9. The variety is highly susceptible to bacterial leaf blight and brown planthopper, and moderately susceptible to blast. Key grain quality parameters: milled rice recovery rate 65.6%, degree of chalkiness 1.0%, amylose content 16.6%, gel consistency 65 mm, alkali digestion value 6.3, and length-to-width ratio 3.1, meeting the Grade II standard of the agricultural industry’s “Quality Standards for Edible Rice Varieties.”

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