Sanxiangyou 714 rice variety (formerly known as 316a/y0714)

Variety source: Sanxiang A (316AA) × y0714

Characteristics: This variety is an indica three-line hybrid rice. When grown as a double-cropping late rice in the middle and lower reaches of the Yangtze River, the average whole growth period is 123.9 days, 2.7 days later than the control Shanyou 46. Plant height is 111.1 cm; the plants are tall and grow vigorously, with average uniformity. The number of effective panicles per mu is 181,000; panicle length is 24.7 cm; total grains per panicle is 123.4; seed setting rate is 76%; and 1000-grain weight is 30.1 g. Average resistance performance over two years: rice blast grade 9, bacterial leaf blight grade 7, and brown planthopper grade 9. Main rice quality indicators: head rice rate 63%, length-to-width ratio 2.7, chalkiness rate 57%, chalkiness degree 10.9%, gel consistency 47.5 mm, and amylose content 21.5%.

Yield performance: In 2001, it participated in the regional trial of the late indica medium-late maturing high-quality group in the middle and lower reaches of the Yangtze River, with an average yield of 489.26 kg per mu, 2.94% higher than the control Shanyou 46 (significant); in 2002, it continued in the high-yield group trial, with an average yield of 460.33 kg per mu, 4.6% higher than the control Shanyou 46 (highly significant); the two-year regional trial average yield was 474.33 kg per mu, 3.77% higher than the control Shanyou 46. In 2003, the production trial average yield was 464.65 kg per mu, 1.64% lower than the control Shanyou 46.

Key cultivation techniques: 1. Raise strong seedlings: sow at the same time as Shanyou 46 according to local planting habits, with a sowing rate of 12.5 kg per mu, and control the seedling age within 32 days; 2. Transplanting: planting density is 16.7´20 cm or 20´20 cm, with more than 50,000 basic seedlings per mu; 3. Fertilizer and water management: base fertilizer should be mainly organic fertilizer, with heavy application of topdressing at the early stage and fertilizer applied according to seedling condition at the later stage. Apply 12 kg pure nitrogen, 6 kg phosphorus pentoxide, and 9 kg potassium oxide per mu. Water management should achieve shallow water and frequent irrigation at the early stage, mainly moist conditions at the later stage, alternating dry and wet to plump the grains, and drain the field 10 days before harvest; 4. Pest and disease control: pay attention to controlling rice blast and bacterial leaf blight.

Approval opinion: Upon review, this variety meets the national rice variety approval standards and has passed approval. This variety has a moderate maturity period, relatively high yield, is highly susceptible to rice blast, susceptible to bacterial leaf blight, and has average rice quality. It is suitable for planting as double-cropping late rice in lightly affected areas of rice blast and bacterial leaf blight in central and northern Guangxi, central and northern Fujian, central and southern Jiangxi, central and southern Hunan, and southern Zhejiang.