Qiang Liang You Aoxiang Simiao

Variety Name: Qiang Liang You Aoxiang Simiao

Approval Number: National Rice Variety Approval No. 20216111

Breeding Institution: Hunan Aopulon Technology Co., Ltd.

Variety Origin: Strong 11S × Aoxiang Simiao

Characteristics: 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 damage reached the highest level of 7; bacterial leaf blight, brown planthopper, and other pests all scored at level 9, indicating high susceptibility to bacterial leaf blight and brown planthopper, and moderate susceptibility to blast. The variety 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 stipulated in 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 damage reached the highest level of 5; bacterial leaf blight, brown planthopper, and other pests all scored at level 9, indicating high susceptibility to bacterial leaf blight and brown planthopper, and moderate susceptibility 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 stipulated in the agricultural industry’s “Quality Standards for Edible Rice Varieties.”

Yield Performance: In 2019, the variety was included in the regional trial for the mid-to-late-maturing indica rice group in the middle and lower reaches of the Yangtze River, achieving an average yield of 689.25 kg per mu, a 4.74% increase over the control variety Fengliangyou No. 4. In the 2020 follow-up trial, the average yield was 664.68 kg per mu, representing a 4.13% increase over Fengliangyou No. 4. Over the two-year regional trial period, the average yield was 676.96 kg per mu, a 4.44% increase compared with the control. In the 2020 production trial, the average yield was 643.23 kg per mu, up 4.38% from Fengliangyou No. 4. In 2018, the variety was also entered in the regional trial for the late-maturing photoperiod-sensitive indica rice group in South China, with an average yield of 461.76 kg per mu, a 3.72% increase over the control Boyou 998. In the 2019 follow-up trial, the average yield rose to 514.06 kg per mu, a 3.86% increase over Boyou 998. Over the two-year regional trial period, the average yield was 487.91 kg per mu, a 3.79% increase over Boyou 998. In the 2019 production trial, the average yield was 503.16 kg per mu, up 0.81% from Boyou 998.

Key cultivation techniques: Growing a single-season medium-duration rice crop in the middle and lower reaches of the Yangtze River: 1. Sow seeds at precise rates to produce robust seedlings. Sow in mid-to-late April; for transplanted seedlings, use 1.0–1.2 kg per mu; for direct-seeded or broadcast-transplanted seedlings, use 1.5–2.0 kg per mu. Strengthen fertilizer and water management during the seedling stage and effectively control brown planthoppers. 2. Transplant early at the appropriate time to promote tillering. For paddy-raised seedlings, transplant when they have 5–6 leaves, with a seedling age of 25–30 days; for dry-bedded seedlings, transplant at the 3.5–4 leaf stage, with a seedling age of 15–18 days. Plant at moderate density to ensure a high number of basic tillers, using a planting spacing of 20 cm × 30 cm, with 3 seedlings per hill, resulting in 80,000–100,000 basic tillers per mu. 3. Apply moderate-to-high levels of fertilizer and water, with increased phosphorus and potassium. Apply a heavy base dressing: 25–30 kg per mu of high-concentration compound fertilizer or 35–40 kg per mu of standard compound fertilizer; apply tillering fertilizer early—6–8 kg of urea per mu 5–7 days after transplanting, followed by 8–10 kg of potassium chloride per mu 20–25 days after transplanting. Apply panicle and grain fertilizer judiciously: combine this application with the end of mid-season drying and the resumption of irrigation in the panicle initiation stage, applying 12–15 kg of potassium chloride per mu to promote large panicles, numerous grains, and strong grain filling; limit nitrogen applications in the mid- to late stages. 4. Manage water and control pests and diseases scientifically. Maintain a shallow layer of water for green-up; use shallow and moist conditions during tillering; conduct field drying once seedlings are adequate; keep shallow water during panicle initiation and heading; alternate between wet and dry conditions during grain filling; drain the field 6–8 days before harvest. 5. Timely control of sheath blight, blast, bacterial leaf blight, false smut, brown planthoppers, and stem borers. Pay particular attention to blast control. Growing a double-cropping late-season rice crop in South China: 1. Sow seeds at precise rates to produce robust seedlings. Generally sow around July 15; for transplanted seedlings, use 1.5 kg per mu; for direct-seeded, densely planted crops, use 1.5–2 kg per mu. Always soak seeds in chlorine dioxide solution, strengthen fertilizer and water management during the seedling stage, and effectively control brown planthoppers. 2. Transplant early at the appropriate time and plant at suitable density. Transplant when seedlings have 5 leaves, with an ideal seedling age of 18–25 days. Plant more seedlings, using a transplant spacing of 20 cm × 20 cm, with 3 seedlings per hill, ensuring at least 80,000 basic tillers per mu. 3. The main field requires moderate-to-high fertilizer levels; apply a heavy base dressing: 25–30 kg per mu of high-concentration compound fertilizer or 35–40 kg per mu of standard compound fertilizer; apply tillering fertilizer early—7–9 kg of urea per mu 5–7 days after transplanting, followed by 8–10 kg of potassium chloride per mu 20–22 days after transplanting. Increase potassium application as panicle and grain fertilizer; in the mid-stage of panicle initiation, apply 12–15 kg of potassium chloride per mu to promote large panicles, numerous grains, and strong grain filling, while limiting nitrogen applications in the later stages. 4. Manage water and control pests and diseases scientifically. Maintain a shallow layer of water for green-up; use shallow and moist conditions during tillering; conduct field drying once seedlings are adequate; keep shallow water during panicle initiation and heading; alternate between wet and dry conditions during grain filling; drain the field 6–8 days before harvest. 5. Timely control of pests and diseases. During the seedling stage, apply pesticides promptly to control brown planthoppers and prevent southern black-streaked dwarf disease. In the main field, based on pest and disease forecasts, apply pesticides in a timely manner to control stem borers, rice leafrollers, brown planthoppers, bacterial leaf blight, sheath blight, and other pests and diseases. In areas where blast frequently recurs, pay special attention to blast control.