The whole growth period of late maturing middle rice planted in the upper reaches of the Yangtze River is 150.0 days, 0.7 days shorter than that of the control F You 498. Main indicators of rice quality: head rice rate 63.2%, length width ratio 2.8, chalky grain rate 30%, chalkiness 4.5%, gel consistency 62 mm, amylose content 22.31%, reaching the national standard of high quality level 3.

The plant type and height are moderate, and the tillering ability is strong. The sword leaf is medium long, slanting and curling. The panicle layer is regular, the panicle is medium, and the grains are uniform; The grain is long, the lemma tip is colorless, and some grains have a short awn. In the regional test, the effective spike per mu is 189000, the plant height is 117.8 cm, the spike length is 26.5 cm, the total number of grains per spike is 176.0, the number of grains per spike is 149.4, the seed setting rate is 84.9%, and the 1000 grain weight is 26.58 g. The whole growth period is 135.1 days, 4.9 days shorter than Yangliangyou 6. From 2012 to 2013, he participated in the regional test of medium rice in Hubei Province. The rice quality was determined by the Food Quality Supervision, Inspection and Testing Center (Wuhan) of the Ministry of Agriculture. The rice yield was 80.2%, the head rice rate was 51.4%, the chalky grain rate was 85%, the chalkiness was 11.1%, the amylose content was 20.4%, the gel consistency was 47 mm, and the length width ratio was 3.1.

In the middle and lower reaches of the Yangtze River, the whole growth period of medium rice sown in April is 130-132 days, and the whole growth period from May to early June is 124-127 days, 4-6 days shorter than that of Fengliangyou 4. The plant height is 114cm, the spike length is 26.8cm, the effective spikes per mu are 178000, the total grains per spike are 204.5, the seed setting rate is about 88%, and the 1000 grain weight is 27.5g. Main indicators of rice quality: head rice rate 62.1%, length width ratio 3.2, chalky grain rate 18%, chalkiness 2.3%, gel consistency 82 mm, amylose content 15.2%, and the comprehensive rice quality reaches the national level 3 standard of "high-quality rice".

In Hunan Province, the whole growth period of late maturing medium rice was 134.8 days, 0.4 days shorter than that of the control Y Liangyou 1. The plant height is 120.9 cm, the effective panicles per mu are 170000, the total grains per panicle are 196.3, the seed setting rate is 82.5%, and the 1000 grain weight is 24.7 g. Main indicators of rice quality: brown rice rate 79.1%, milled rice rate 70.5%, head rice rate 61.2%, grain length 6.1 mm, length width ratio 3.2, chalky grain rate 45%, chalkiness 16.5%, transparency 2, alkali dissipation value 4.5, gel consistency 86 mm, amylose content 12.5%.

The whole growth period of double cropping late rice in the middle and lower reaches of the Yangtze River is 109.2 days, 7.2 days shorter than that of the control Wuyou 308. The plant height is 98.8 cm, the ear length is 21.9 cm, the effective ears per mu are 192000 ears, the total grains per ear are 152.3, the seed setting rate is 86.6%, and the 1000 grain weight is 25.6 g. Main indicators of rice quality: head rice rate 61.8%, chalky grain rate 5%, chalkiness 0.8%, amylose content 15%, gel consistency 60 mm, length width ratio 3.4, reaching the second level of the standard of "Quality of Edible Rice Varieties" in the agricultural industry.

Through multiple composite hybridization, the excellent genes of Aolong 1S, Y58S, Guangmian 63S and disease resistant germplasm materials were gathered and bred directionally, and the comprehensive characters were comprehensively improved compared with the parents.