List of Rice Varieties Approved by the National Variety Approval Committee in 2006

Approval number: Guoshendao 2006013

Variety name: Luliangyou 996

Breeding units: Hunan Agricultural University, Hunan Yahua Seed Industry Science Academy

Variety source: Lu 18S x 996

Provincial approval status: Approved by the Hunan Provincial Crop Variety Approval Committee in 2005

Characteristics: This variety is an indica two-line hybrid rice. Grown as early rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 109.7 days, 1.7 days earlier than the control Jinyou 402. Moderate plant type, thick stems, 196,000 effective panicles per 667 sq m, plant height 95.1 cm, panicle length 20.0 cm, 129.0 total grains per panicle, seed setting rate 82.0%, 1000-grain weight 27.5 g. (1) Resistance: average rice blast disease rating 3.9, maximum 9, resistance frequency 30%; bacterial leaf blight rating 7. (2) Main rice quality indicators: head rice rate 42.3%, length-to-width ratio 2.8, chalky grain rate 91%, chalkiness degree 11.1%, gel consistency 55 mm, amylose content 24.2%.

Yield performance: In 2004, it participated in the regional trial of the early indica late-maturing group in the middle and lower reaches of the Yangtze River, with an average yield of 520.51 kg per 667 sq m, 7.17% higher than the control Jinyou 402 (extremely significant); in 2005, in the continued trial, the average yield was 524.67 kg per 667 sq m, 4.24% higher than the control Jinyou 402 (extremely significant); the two-year regional trial average yield was 522.59 kg per 667 sq m, 5.70% higher than the control Jinyou 402. In the 2005 production trial, the average yield was 557.60 kg per 667 sq m, 7.34% higher than the control Jinyou 402.

Key cultivation techniques: (1) Seedling raising. Sow at the appropriate time according to the local early rice production season; generally sow in flooded seedling beds at the end of March, and sow appropriately earlier in dry seedling beds; sowing rate 8 kg per 667 sq m of seedling bed, seed rate for transplanting 2-2.5 kg per 667 sq m of field. (2) Transplanting. Generally, dry-raised small seedlings are thrown-transplanted at 3.1-4.1 leaves, and flooded-raised small seedlings are transplanted at about 4.5 leaves (seedling age 25 days); transplanting density 16.5 cm x 20 cm or throwing density 20,000 hills per 667 sq m, with 2 grain seedlings per hill, and 80,000-100,000 basic seedlings transplanted (thrown) per 667 sq m. (3) Fertilizer and water management. For fields of medium fertility, generally 11-12 kg pure nitrogen, 6 kg phosphorus pentoxide, and 6-7 kg potassium oxide are required per 667 sq m. Apply sufficient basal fertilizer, apply topdressing early, and apply panicle fertilizer skillfully; when harrowing the field, apply 50 kg of 25% rice-specific compound fertilizer per 667 sq m; 5-7 days after transplanting, in combination with herbicide application, apply an additional 7.5-10 kg urea per 667 sq m; at the booting stage, apply 6-7 kg potassium chloride per 667 sq m. During the tillering stage, alternate wetting and drying to promote tillering; at the booting stage, keep mainly wet and maintain a water layer on the field surface; at the heading stage, keep shallow water in the field; during the grain-filling stage, alternate drying and wetting, and never cut off water too early. (4) Pest and disease control. Persist in soaking seeds with strong chlorine to prevent seed-borne diseases such as bakanae disease; during the growth period, promptly control rice blast, bacterial leaf blight, sheath blight, stem borers, rice planthoppers, and other pests and diseases.

Approval opinion: This variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, high yield, is susceptible to bacterial leaf blight, highly susceptible to rice blast, and has average rice quality. It is suitable for planting as early rice in double-cropping rice areas with light occurrence of rice blast and bacterial leaf blight in northern Fujian, Jiangxi, Hunan, and south-central Zhejiang.

Approval number: Guoshendao 2006014

Variety name: Zhunliangyou No. 2 (regional trial code: Zhunliangyou 402)

Breeding unit: Tsinghua Shenzhen Longgang Institute of the National Hybrid Rice Engineering Technology Research Center

Variety source: Zhun S x R402

Characteristics: This variety is an indica two-line hybrid rice. Grown as early rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 113.6 days, 2.2 days later than the control Jinyou 402. Plant type relatively loose, leaf color relatively light, 223,000 effective panicles per 667 sq m, plant height 94.6 cm, panicle length 20.0 cm, 100.8 total grains per panicle, seed setting rate 84.2%, 1000-grain weight 28.4 g. (1) Resistance: average rice blast disease rating 3.8, maximum 9, resistance frequency 40%; bacterial leaf blight rating 7. (2) Main rice quality indicators: head rice rate 42.4%, length-to-width ratio 3.2, chalky grain rate 84%, chalkiness degree 12.7%, gel consistency 56 mm, amylose content 23.8%.

Yield performance: In 2004, it participated in the regional trial of the early indica late-maturing group in the middle and lower reaches of the Yangtze River, with an average yield of 512.65 kg per 667 sq m, 5.55% higher than the control Jinyou 402 (extremely significant); in 2005, in the continued trial, the average yield was 523.66 kg per 667 sq m, 4.04% higher than the control Jinyou 402 (extremely significant); the two-year regional trial average yield was 518.16 kg per 667 sq m, 4.79% higher than the control Jinyou 402. In the 2005 production trial, the average yield was 552.49 kg per 667 sq m, 6.35% higher than the control Jinyou 402.

Key cultivation techniques: (1) Seedling raising. Sow at the appropriate time according to the local early rice production season, generally seizing sunny days in late March for sowing. (2) Transplanting. In late April, throw-transplant or transplant; transplanting at 20,000 hills per 667 sq m is appropriate, and for throw-transplanting, 80,000-90,000 basic seedlings per 667 sq m is appropriate. (3) Fertilizer and water management. Apply 14.7 kg pure nitrogen, 9.3 kg phosphorus pentoxide, and 10.7 kg potassium oxide per 667 sq m. Fertilization should be based mainly on basal fertilizer, supplemented by topdressing, with fertilizer applied later according to seedling condition, and organic fertilizer and chemical fertilizer appropriately combined. Water management follows conventional methods, and water should not be drained too early in the later stage. (4) Pest and disease control. Pay attention to timely control of rice blast, bacterial leaf blight, and other pests and diseases.

Approval opinion: This variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, relatively high yield, is susceptible to bacterial leaf blight, highly susceptible to rice blast, and has average rice quality. It is suitable for planting as early rice in double-cropping rice areas with light occurrence of rice blast and bacterial leaf blight in northern Fujian, Jiangxi, Hunan, and south-central Zhejiang.

Approval number: Guoshendao 2006015

Variety name: Neixiang 2924

Breeding unit: Neijiang Hybrid Rice Science and Technology Development Center

Variety source: Neixiang 2A x Neihui 92-4

Characteristics: This variety is an indica three-line hybrid rice. Grown as single-season mid-season rice in the upper reaches of the Yangtze River, the average whole growth period is 155.4 days, 3.2 days later than the control Shanyou 63. Moderate plant type, flag leaves broad and erect, 177,000 effective panicles per 667 sq m, plant height 112.6 cm, panicle length 25.1 cm, 160.7 total grains per panicle, seed setting rate 74.5%, 1000-grain weight 30.9 g. (1) Resistance: average panicle blast disease rating 5.9, maximum 9, resistance frequency 39.3%. (2) Main rice quality indicators: head rice rate 57.9%, length-to-width ratio 3.0, chalky grain rate 19%, chalkiness degree 2.9%, gel consistency 73 mm, amylose content 15.9%, reaching Grade 3 of the national High-Quality Paddy Rice standard.

Yield performance: In 2004, it participated in the regional trial of the mid-indica late-maturing group in the upper reaches of the Yangtze River, with an average yield of 609.16 kg per 667 sq m, 6.55% higher than the control Shanyou 63 (extremely significant); in 2005, in the continued trial, the average yield was 601.02 kg per 667 sq m, 4.86% higher than the control Shanyou 63 (extremely significant); the two-year regional trial average yield was 605.09 kg per 667 sq m, 5.70% higher than the control Shanyou 63. In the 2005 production trial, the average yield was 551.73 kg per 667 sq m, 8.60% higher than the control Shanyou 63.

Key cultivation techniques: (1) Seedling raising. Sow early at the appropriate time according to the local mid-indica production season, with a seed rate of 1 kg per 667 sq m of field. (2) Transplanting. Transplant 13,000-15,000 hills per 667 sq m, ensuring about 100,000 basic seedlings. (3) Fertilizer and water management. Apply heavy basal fertilizer, apply topdressing early, pay attention to the rational combination of nitrogen, phosphorus, and potassium fertilizers, and avoid draining water too early in the later stage. Other cultivation and management measures are similar to those for Shanyou 63. (4) Pest and disease control. Pay attention to timely control of rice blast and other pests and diseases.

Approval opinion: This variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, high yield, excellent rice quality, and is highly susceptible to rice blast. It is suitable for planting as single-season mid-season rice in low- and medium-altitude indica rice areas in Yunnan, Guizhou, and Chongqing (excluding the Wuling Mountain area), plain and hilly rice areas in Sichuan, and lightly affected rice blast areas in southern Shaanxi.

Approval number: Guoshendao 2006016

Variety name: Gangyou 825 (regional trial code: F3001)

Breeding unit: Sichuan Jialing Crop Variety Research Center

Variety source: Gang 46A x Jiahui 825

Previous approval status: Approved by the national and Guangxi Zhuang Autonomous Region Crop Variety Approval Committees in 2005

Characteristics: This variety is an indica three-line hybrid rice. Grown as single-season mid-season rice in the upper reaches of the Yangtze River, the average whole growth period is 153.6 days, 1.4 days later than the control Shanyou 63. Compact plant type, thick stems, erect leaves, deep leaf color, 164,000 effective panicles per 667 sq m, plant height 112.7 cm, panicle length 24.7 cm, 168.6 grains per panicle, seed setting rate 83.9%, 1000-grain weight 28.2 g. (1) Resistance: average panicle blast disease rating 4.6, maximum 7, resistance frequency 46.4%. (2) Main rice quality indicators: head rice rate 64.7%, length-to-width ratio 2.0, chalky grain rate 84%, chalkiness degree 12.9%, gel consistency 43 mm, amylose content 22.4%.

Yield performance: In 2004, it participated in the regional trial of the mid-indica late-maturing group in the upper reaches of the Yangtze River, with an average yield of 632.36 kg per 667 sq m, 10.60% higher than the control Shanyou 63 (extremely significant); in 2005, in the continued trial, the average yield was 614.34 kg per 667 sq m, 7.19% higher than the control Shanyou 63 (extremely significant); the two-year regional trial average yield was 623.35 kg per 667 sq m, 8.89% higher than the control Shanyou 63. In the 2005 production trial, the average yield was 552.75 kg per 667 sq m, 10.68% higher than the control Shanyou 63.

Key cultivation techniques: (1) Seedling raising. Sow early at the appropriate time according to the local mid-indica production season. (2) Transplanting. Generally transplant 15,000-20,000 hills per 667 sq m, at a spacing of 16.5 cm x 26.4 cm, with 2 grain seedlings per hill. (3) Fertilizer and water management. Apply sufficient basal fertilizer, apply tillering fertilizer early, apply heavy panicle fertilizer, and supplement grain fertilizer as appropriate, paying attention to the combined application of nitrogen, phosphorus, and potassium. Avoid cutting off water too early in the later stage. (4) Pest and disease control. Pay attention to timely control of rice blast, rice planthoppers, and other pests and diseases.

Approval opinion: This variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, high yield, is susceptible to rice blast, and has average rice quality. It is suitable for planting as single-season mid-season rice in low- and medium-altitude indica rice areas in Yunnan, Guizhou, and Chongqing (excluding the Wuling Mountain area), plain and hilly rice areas in Sichuan, and lightly affected rice blast areas in southern Shaanxi. According to Announcement No. 516 of the Ministry of Agriculture of the People's Republic of China, this variety (approval number: Guoshendao 2005028) is also suitable for planting as single-season mid-season rice in lightly affected rice blast areas in the Yangtze River rice areas of Fujian, Jiangxi, Hunan, Hubei, Anhui, Zhejiang, and Jiangsu (excluding the Wuling Mountain area), as well as in lightly affected rice blast areas in southern Henan.