How good is the Gangyou 22 rice variety? Characteristics and yield introduction

Breeding institutions: Crop Research Institute of Sichuan Academy of Agricultural Sciences and Rice Research Institute of Sichuan Agricultural University.

Approval status: approved in 1996 by the Sichuan Provincial Crop Variety Approval Committee and the Guizhou Provincial Crop Variety Approval Committee, and in 1998 by the National Crop Variety Approval Committee.

Variety approval number: Guoshendao 980009.

Variety source: Gang 46A x CDR22.

Characteristics: medium indica late-maturing hybrid rice. Plant height about 110 cm, moderate plant type, thick stems, broad and upright leaves, strong tillering ability, light green leaf color, relatively broad and large leaves that are thick and straight rather than drooping, yellow grains with green stems, no premature senescence, large panicles with many grains, about 150 grains per panicle, 17 grains more than Shanyou 63, seed-setting rate 8349%, 1000-grain weight 26.5 g, light yellow husk, no awn on the panicle tip, relatively good grain quality. The whole growth period is 149.3 days, 1.2 days later than Shanyou 63. Yield performance and rice blast resistance are superior to Shanyou 63. In 1993 and 1994, it participated in the Sichuan provincial regional trial, with an average yield of 553 kg per mu, 4.53% higher than Shanyou 63; in the Guizhou provincial regional trial, the two-year average yield was 587 kg per mu, 6.33% higher than Shanyou 63; in the Yunnan Honghe Prefecture regional trial, the yield was 715 kg per mu, 13.98% higher than Shanyou 63. All yield increases reached an extremely significant level.

Cultivation points: plant in indica rice areas of river valleys, flatlands and hills below 800 m altitude, and it can also be cultivated in medium indica rice areas at 1000-1500 m altitude. Tillering ability is slightly weak, so ensure that the effective panicles per mu reach 160,000-170,000 panicles, and the basic seedlings per mu reach 100,000-120,000; nitrogen, phosphorus, potassium fertilizers and organic fertilizers should be used in a reasonable combination; manage water scientifically, drain the field for drying in the mid-stage, irrigate from booting to full heading stage, alternate wetting and drying after full heading, control fertilizer with water, and timely prevent and control diseases and insect pests.

Suitable range: cultivation in parts of Sichuan, Guizhou, Fujian, Yunnan, Shaanxi and other provinces.