Hongliangyou Aolong Simiao

Variety Name: Hongliangyou Aolong Simiao

Approval Number: National Rice Variety Approval No. 20216168

Breeding Institution: Hunan Aopulon Technology Co., Ltd., Hunan Agricultural University

Variety Origin: Hongfeng 80S × Aolong Simiao

Characteristics: A indica-type two-line hybrid rice variety. When grown as a late-season double-cropping rice in the middle and lower reaches of the Yangtze River, its total growth period is 113.0 days, which is 3.2 days earlier than the control variety Wuyou 308. Plant height is 98.2 cm, panicle length is 22 cm, with 209,000 effective panicles per mu; each panicle bears 149.1 grains, with a seed-setting rate of 82.6% and a 1,000-grain weight of 25.2 g. Resistance: the comprehensive blast disease index over two years was 3.3 and 4.6, respectively; the panicle-neck blast damage rating reached the highest level of 5; bacterial leaf blight was rated at 7; and brown planthopper resistance was rated at 9, indicating high susceptibility to brown planthopper, moderate susceptibility to blast, and susceptibility to bacterial leaf blight, with relatively weak cold tolerance. Key rice quality parameters: milled rice recovery rate of 65.0%, chalkiness of 2.6%, amylose content of 16.0%, gel consistency of 60 mm, alkali digestion value of 6, and length-to-width ratio of 3.7, all meeting the Grade II standard stipulated in the agricultural industry’s “Quality Standards for Edible Rice Varieties.”

Yield Performance: In 2018, the variety was included in the regional trial for the late-maturing early indica rice group in the middle and lower reaches of the Yangtze River, achieving an average yield of 615.37 kg per mu, a 2.92% increase over the control variety Wuyou 308. In the follow-up trial in 2019, the average yield was 604.85 kg per mu, representing a 2.01% increase over Wuyou 308. Over the two-year regional trial period, the average yield was 610.10 kg per mu, a 2.47% increase compared with the control variety Wuyou 308. In the 2019 production trial, the average yield was 615.78 kg per mu, a 4.10% increase over Wuyou 308.

Key cultivation techniques: 1. Sow at the optimal time and cultivate robust seedlings. In the middle and lower reaches of the Yangtze River, for double-cropping late-season rice, sowing is generally carried out from June 18 to 21; the seeding rate for transplanting in the main field is 1.3 kg per mu, while for direct seeding or broadcast seeding it is 2–2.5 kg per mu. Strengthen fertilizer and water management during the seedling stage and effectively control brown planthoppers. 2. Transplant early at the appropriate age to promote tillering; the ideal seedling age is 20–27 days. Adopt dense planting by increasing the number of transplants, with a transplant spacing of 20 cm × 20 cm and 3–4 tillers per hill, ensuring a stand of 70,000–80,000 basic seedlings per mu. 3. Apply fertilizer and manage the crop early. Apply a heavy base fertilizer: 25 kg of high-concentration compound fertilizer or 30–35 kg of ordinary compound fertilizer per mu; apply tillering fertilizer early—5–7 days after transplanting, apply 8–10 kg of urea and 6–8 kg of potassium chloride per mu. Supplement with panicle- and grain-filling fertilizer: during the mid-podding stage, apply 10–12 kg of potassium chloride per mu to promote large panicles with more grains and stronger grain filling, while reducing nitrogen application in the mid-to-late stages. 4. Manage water and control pests and diseases scientifically. After transplanting, maintain deep water to revitalize the seedlings; during the tillering stage, keep shallow water to promote tillering; once the desired seedling density is reached, drain the field promptly to expose the soil for drying; from the panicle initiation stage to heading, maintain a shallow layer of water on the field surface; during the grain-filling stage, alternate between dry and wet conditions to strengthen grain filling; and drain the field completely 7–8 days before harvest. 5. Control pests and diseases scientifically. Always soak seeds in strong chlorine-based disinfectant, and apply pesticides promptly during the seedling stage to control brown planthoppers. During the main-field stage, apply pesticides in a timely manner to control stem borers, brown planthoppers, bacterial leaf blight, blast, sheath blight, and other pests and diseases.

Review and Approval Opinion: This variety meets the national standards for rice variety approval and has been officially approved. It is suitable for late-season rice cultivation in areas with low incidence of blast disease within the double-cropping rice regions of Jiangxi Province, Hunan Province, Hubei Province, Anhui Province, and Zhejiang Province.