Lukfook You 1066

Variety Name: Lukfook You 1066

Approval Number: National Rice Variety Approval No. 20186114

Breeding Institution: Hunan Aopulon Technology Co., Ltd.

Variety Type: Indica three-line hybrid rice

Variety Origin: Lukfook A × Au R1066

Rice quality standards: Grade 2 Standard for Quality of Edible Rice Varieties

Average yield per mu: 611.76 kilograms

Reproductive period: Average of 113.1 days

Characteristics: A indica-type three-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 113.1 days, which is 5.3 days earlier than the control variety Wuyou 308. Plant height is 99.6 cm, panicle length is 22.5 cm, with 206,000 effective panicles per mu; each panicle bears 144.1 grains, with a seed-setting rate of 84.1% and a 1,000-grain weight of 25.7 g. Resistance: the comprehensive blast disease index over two years was 6.1 and 4.3, respectively; the panicle-neck blast damage rating reached the highest level of 7, indicating susceptibility to blast; susceptible to bacterial leaf blight; highly susceptible to brown planthopper; and moderately cold-tolerant. Key rice quality parameters: milled rice recovery rate of 68.1%, chalky grain rate of 7.0%, degree of chalkiness of 2.1%, amylose content of 13.8%, gel consistency of 70 mm, and length-to-width ratio of 3.3, meeting the Grade II standard stipulated in the agricultural industry’s “Quality Standards for Edible Rice Varieties.”

Yield Performance: In the 2015 regional trial for the late-season indica–early-maturing group, the average yield was 586.20 kg per mu, representing a 3.45% increase over the control variety Wuyou 308. In the 2016 follow-up trial, the average yield was 611.76 kg per mu, a 4.59% increase over Wuyou 308. Over the two-year regional trial period, the average yield was 598.98 kg per mu, 4.02% higher than that of Wuyou 308. In the 2017 production trial, the average yield was 606.24 kg per mu, a 4.76% increase over Wuyou 308.

Key cultivation techniques: 1. Sow at the optimal time to produce robust seedlings. Sow from June 22 to 24, using 1.2–1.4 kg of seed per mu in the main field; sow sparsely and evenly, and strengthen fertilizer and water management to cultivate strong seedlings. 2. Transplant at the appropriate time and plant at a reasonable density. Transplant when the seedlings have five and a half leaves, with an ideal seedling age of 20–27 days; use a planting spacing of 20 × 23 cm, placing two rice seedlings per hill, and ensuring 70,000–80,000 basic seedlings per mu. 3. Strengthen fertilizer and water management. The nutrient requirement for the main field is moderate; generally apply 30–35 kg of standard compound fertilizer containing 45% total nutrients per mu. After transplanting and green-up, top-dress with 6–8 kg of urea and 8–10 kg of potassium chloride. During the panicle initiation and mid-to-late stages, apply panicle- and grain-filling fertilizer based on crop condition, moderately reducing nitrogen application while increasing phosphorus and potassium. Implement targeted water and fertilizer management aimed at “strong roots, sturdy stems, and healthy plants”: maintain shallow water to promote tillering, allow the field to dry once sufficient tillers have formed, keep shallow water during panicle initiation and heading, alternate between wet and dry conditions during grain filling and maturity, and stop irrigation 6–8 days before harvest. 4. Conduct integrated pest and disease control. Focus on controlling blast disease, and, in accordance with the occurrence patterns of pests and diseases, strengthen chemical control of stem borers, rice leafrollers, brown planthoppers, and sheath blight, among others.

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 cultivation in areas with low incidence of blast disease in double-cropping rice regions of Jiangxi Province, Hunan Province, Hubei Province, Anhui Province, and Zhejiang Province; however, it is not recommended for cultivation in areas with severe blast disease outbreaks.