Gangyou 177 (Rice)

[variety name] Gangyou 177 = Gangyou 177 (46A/ Chenghui 177) is a medium indica late maturing type, which was bred by crop Research Institute of Sichuan Academy of Agricultural Sciences.

[characteristics] according to the rice and product quality supervision, inspection and testing center of the Ministry of Agriculture, Gangyou 177 has brown rice rate of 80.6%, milled rice rate of 72.8%, head rice rate of 61.9%, grain length 6.2mm, length-width ratio of 2.4,59% of chalkiness, 6.0% of chalkiness, transparency of grade 3, alkali elimination value of 5.9, gel consistency 41mm, amylose content of 22.7% and protein content of 92%.

Gangyou 177 is more resistant to rice blast. Identified by the Institute of Plant Protection, Rice Institute of Sichuan Academy of Agricultural Sciences and the Rice Institute of Sichuan Agricultural University, Gangyou 177 was classified as 2-6 leaf blast, 1-7 cervical blast, Shanyou 63 8-9 leaf blast and 9 cervical blast.

The whole growth period of Gangyou 177 is 150 days (average of 2 years in Sichuan regional trial from 1998 to 1999), which is one day longer than the control, plant height 112.6cm, effective panicle 2.3685 million / hm2, panicle length 24.8cm, average grain per panicle 159.6 grains, seed setting rate 86.3%, 1000-grain weight 27.7g. Gangyou 177 has the advantages of vigorous growth in the field, good leaf type, medium tillering ability, strong lodging resistance and good color conversion at maturity.

The combination participated in the variety comparison test of our institute in 1996, and the yield per unit area was 8.16t/hm2, which was 8.15% higher than that of Shanyou 63. A multi-site experiment was conducted in 1997, with an average per unit yield of 8.42t/hm2, 1.52% higher than that of the control Shanyou 63, 1.52% higher than that of the control Shanyou 63. From 1998 to 1999, we participated in the regional trial of the late ripening group of Zhongbai in Sichuan Province. The average unit yield of 8.28t/hm2 in 2 years was 4.24% higher than that of the control Shanyou 63. In 1999, the average yield per unit area of Sichuan province was 5.45% higher than that of the control.

Crop Research Institute of Sichuan Academy of Agricultural Sciences

[region and technology] a) sowing timely and early to cultivate strong tillers and strong seedlings. It is suitable to sow seeds in middle and late March in Southeast Sichuan and in early April in Northwest Sichuan. Raising seedlings can be done by wet raising in the open air, wet raising with plastic film, two-stage raising and dry raising. The seedling age is 35-40 days. B) appropriate close planting. Gangyou 177has medium tillering ability, compact plant type, tall and straight flag leaves, suitable for close planting, and general planting specification of 20cm × 20cm. C) rational fertilization. Nitrogen, phosphorus and potassium should be applied at the right time. The general principle is to re-apply base fertilizer and early application of tiller fertilizer to promote early and stable growth and increase the panicle rate of tillers. Medium fertility fields generally use pure nitrogen 150~180kg, phosphate fertilizer 375~450kg and potassium fertilizer 225~300kg per hectare. D) timely control of diseases and insect pests Chenghui 177 was sown in spring in Chengdu, the duration from sowing to heading was 105 days, which was 4 days shorter than that of Minghui 63, and the average leaf of main stem was 16.0 leaves, 0.5-1.0 less than Minghui 63. The pollen quantity is sufficient, the pollen density is high, the pollen dispersal is good, the pollen vigor is strong, the florescence is 10-12 days, the flowering time is more concentrated, the sunny day 11-30-12-30 is the full flowering stage. The sowing time of Chenghui 177 and Gang46A was shorter than that of Gangyou 12. Please refer to the seed production technology of Gangyou 12 for other techniques.