Breeding and Utilization of the Japonica Hybrid Rice Hanyou 1027

Hanyou 1027 is a new japonica hybrid rice combination bred by the institute in 1985 by crossing the Hanfeng male-sterile line with the T1027 restorer line. In 1986, at the institute's experimental farm, on 1.62 mu the yield was 581.7 kg per mu, an increase of 11.8% over Hanfeng. In 1988, on 1.2 mu at the institute, the yield was 604.6 kg per mu, an increase of 22.0% over Xiushui 04. As a single-season rice in Shanghai, the combination takes 153-156 days; as a double-season rice in Changsha and Hangzhou, 122-142 days; as a single-season rice the plant height is 100-105 cm, and as a late double-season rice 80-90 cm; it is suitable for dense planting, tillers quickly, has a high percentage of productive ears, large ears and densely set grains; it is moderately resistant to bacterial leaf blight. It has strong cold tolerance at the late stage and is susceptible to rice false smut; the grain center and chalkiness are small, the transparency is high and glossy, the cooked rice yield is high, and the eating quality is good; the seed production yield is about 150 kg. Cultivation points: for single-season rice in Shanghai, sow around May 20, with a seedling age of about 30 days. Sow 15 kg per mu in the seedling bed, and use 2 kg of seed per mu in the field. For dense planting, use 23.3 x 10 cm or 20 x 13.3 cm, with 80,000-100,000 basic seedlings per mu. Fertilization should follow the principle of promoting early growth and supplementing later. After the mid-season field drying and re-watering, apply ear fertilizer according to the seedling condition, and control diseases and pests. During the heading and grain-filling stages, after rain clears, spray with carbendazim, rustine, etc. 2-3 times for control.