K you 404 (Rice)

Breeding unit: Rice Sorghum Research Institute, Sichuan Academy of Agricultural Sciences.

Examination and approval: approved by the National crop Variety approval Committee in 1999.

Variety approval number: national examination and approval rice 990012.

Variety source: K17AxRANO

Characteristics: three-line early hybrid rice combination. The seedling stage is cold-tolerant, the leaf color is dark green, and the plant type is tight and loose. The plant height is about 91 cm, the effective ear per mu is 213000, the ear length is 19.5cm, the total grain per panicle is 99, the seed setting rate is about 72.29%, and the 1000-grain weight is 28.2g. The grain is yellow and oval. Brown rice rate 79.0%, milled rice rate 68.9%, head rice rate 26.9%, chalkiness rate 99%, chalkiness 26.7%, transparency level 4, amylose content 24.9%. The whole growth period is 116 days in Jiangxi, Hunan, Zhejiang and the central and northern part of Fujian. The high yield is good, and the rice quality is average. Susceptible to rice blast and bacterial blight. 1997 took part in the regional trial of medium and late maturity of early indica rice in southern rice region, and the average yield per mu was 496.10 kg, which was 10.1% and 23.4% higher than that of Zhejiang 733 and Bohuazhan 19, respectively. The average yield per mu was 446.11 kg, equal to that of Wei Dai 402, and 10.1% higher than that of Zhejiang 733. In the production test in 1998, the average yield per mu was 491.9 kg, which was 8.1% higher than that of the control Weidai 402. The performance of high and stable yield, wide adaptability.

Main points of cultivation: the seed amount per mu is 1.5ml and 1.75kg, and the seed soaking time is one day longer than that of Shanyou combination. The specification of 13.2 cm X 20 cm is adopted to guarantee more than 20,000 holes per mu and 3 seeds per hole. Jinggangmycin was used to control sheath blight twice in the peak tillering period. K17 has high outcrossing performance and strong stigma vitality, which is easy to cause biological mixing and reproduction. The place with good isolation conditions should be selected for seed production, and the time difference isolation requirement is more than 20 days. Fertile plants such as maintainer lines should be removed in time at the early stage of heading.

Suitable scope: planting in the central and southern parts of Hunan, Jiangxi, Zhejiang and the central and northern parts of Fujian Province.