A indica-type two-line hybrid rice variety. When grown as a single-season mid-season rice in the upper reaches of the Yangtze River, its total growth period is 151.6 days, which is 2.5 days longer than the control variety F You 498. Plant height is 110.3 cm, panicle length is 23.3 cm, with 135,000 effective panicles per mu; each panicle bears 205.8 grains, with a seed-setting rate of 84.6% and a 1,000-grain weight of 27.5 g. Resistance: the comprehensive blast disease index over two years was 4.8 and 3.8, respectively; the panicle-neck blast damage rating reached the highest level of 7; brown planthopper resistance is rated at level 9. The variety is susceptible to blast but highly susceptible to brown planthopper. It exhibits strong heat tolerance during heading and strong cold tolerance. Key rice quality parameters include: milled rice recovery rate of 59.7%, chalkiness of 2.8%, amylose content of 15.1%, gel consistency of 60 mm, alkali digestion value of 6.8, and length-to-width ratio of 3.5, meeting the Grade II standard stipulated in the agricultural industry’s “Quality Standards for Edible Rice Varieties.”

A two-line hybrid indica rice variety. When grown as a single-season mid-season rice in the middle and lower reaches of the Yangtze River, its total growth period is 132.4 days, which is 0.0 days later than the control variety Fengliangyou No. 4. Plant height is 116.2 cm, panicle length is 27.3 cm, with 164,000 effective panicles per mu; each panicle bears 223.1 grains, with a seed-setting rate of 80.9% and a 1,000-grain weight of 21.7 g. Resistance: the comprehensive blast disease index over two years was 4.8 and 3.0, respectively; the panicle-neck blast damage rating reached the highest level of 5; bacterial leaf blight was rated at level 7; and brown planthopper resistance was rated at level 9. The variety shows moderate susceptibility to blast, susceptibility to bacterial leaf blight, and high susceptibility to brown planthopper. Key grain quality parameters include: brown rice yield of 78.6%, milled rice yield of 66.7%, grain length of 6.8 mm, length-to-width ratio of 3.7, chalkiness of 3.0%, translucency of grade 2, alkali digestion value of grade 6.5, gel consistency of 61 mm, and amylose content of 16.2%, meeting the Grade 2 standard stipulated in the agricultural industry standard “Quality of Edible Rice Varieties” (NY/T 593–2021).

Aojingxiang is a high-quality late-season indica fragrant rice variety developed by Hunan Aopulon Technology Co., Ltd. through hybridization using the maternal line AOR1122 and the paternal line Meixiangzhan No. 2. When grown as a double-cropping late-season rice in the middle and lower reaches of the Yangtze River, Aojingxiang has a total growth period of 115.6 days, which is 2.0 days earlier than the control variety Wuyou 308. Plant height is 104.7 cm, panicle length is 23.6 cm, with 201,000 effective panicles per mu; each panicle bears 163.5 grains, with a seed-setting rate of 80.8% and a 1,000-grain weight of 25.2 g. This variety exhibits moderate susceptibility to blast disease, high susceptibility to bacterial leaf blight, high susceptibility to brown planthopper, and only average cold tolerance.

The pioneer combination of the third phase of super hybrid rice, which was developed by using innovative technology for indica japonica polymerization hybridization, has moderate plant type, good luxuriance, strong tillering ability, medium thick stalks, colorless leaf sheaths and lemma tips. The results of provincial and regional trials: the plant height is 110.4 cm, the effective panicles per mu are 170000 to 180000, the total grains per panicle are 163.4, the seed setting rate is 87.8%, and the 1000 grain weight is 27.5 g. Resistance: the average leaf blast level is 1, the average ear blast level is 9, the comprehensive resistance index of rice blast is 5.2, and the cold resistance and high temperature resistance are strong. Rice quality: brown rice rate 80.4%, milled rice rate 72.6%, head rice rate 58.3%, grain length 6.9 mm, length width ratio 3.3, chalkiness grain rate 24%, chalkiness 4.6%, transparency 1, alkali dissipation value 6.4, gel consistency 81 mm, amylose content 13.1%, protein content 8.6%.

The whole growth period is 159.6 days, 5.3 days later than Zhongyou 169. The plant leaf type is better. The tillering ability is medium, and the spike type is medium. The stem is relatively thick; The leaf color is thick green, and the sword leaf is upright; The leaf sheath and leaf margin are purple. The average plant height is 115.2 cm, the effective spike per mu is 140000, the spike length is 24.9 cm, each spike has 217.0 grains, the seed setting rate is 72.3%, the 1000 grain weight is 29.9 g, the grain type is longer, the spikelet tip is purple, and there is a little top awning. In 2015, it was inspected by the Food Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture (Wuhan): the rate of roughness was 81.6%, the rate of milled rice was 73.2%, the rate of head rice was 53.5%, the rate of chalkiness was 17%, the degree of chalkiness was 3.2%, the grain length was 6.7 mm, the length to width ratio was 2.8, the gel consistency was 50 mm, the content of amylose was 20.8%, the alkali dissipation value was 6.0, the transparency was 1, and the taste evaluation was 74.6 points. The comprehensive rice quality reached the national standard of Grade III high-quality rice.

Indica three line hybrid rice varieties. The whole growth period of medium rice planted in Wuling mountain area is 150.8 days, 2.5 days longer than that of control Ⅱ You264. The plant height is 119.0 cm, the ear length is 25.7 cm, the number of effective ears per mu is 171000, the number of grains per ear is 176.4, the seed setting rate is 82.1%, and the 1000 grain weight is 29.7 g. Main indexes of rice quality: head rice rate 46.3%, length width ratio 3.2, chalky grain rate 90%, chalkiness 15.7%, gel consistency 30 mm, amylose content 22.9%.