Boyou Gan 28 (Rice)

[basic situation] Boyou Gan 28 (Boyou 752) is a middle-late clumsy and late-maturing combination bred by the male sterile line Bo An and the self-selected restorer line 752 in the Rice Institute of Jiangxi Academy of Agricultural Sciences.

The male sterile line Bo An of Guangxi was tested and crossed with the strong restorer line 752 (26 Zaozao / BG910) selected by our research group in Hainan in spring, and the advantage comparison test was carried out in the experimental field of our institute in the autumn of the same year. The results showed that the yield was outstanding and the yield of 102t/hm2 was 9.9% higher than that of Shanyou 63.

Boyou Gan 28 participated in the late rice regional trial in Jiangxi Province in 1996, and the average yield was 6.07t/hm2, which was 2.62% lower than that of Shanyou 10. In 1997, due to the influence of heavy rain and low temperature, the yield in the provincial regional test was 5.6t/hm2, which was 12.05% lower than that of Shanyou 63.

[characteristics] Boyou Gan 28 plant height 110cm, compact plant type, narrow leaves, erect flag leaves, good light posture; strong tillering ability, neat heading, well-developed root system, fertilizer resistance and lodging resistance, large fertilizer requirement, good color falling in the later stage; large panicle 24~26cm, effective panicle 810 per plant, total grains per panicle 160, seed setting rate 88.7%, 1000-grain weight 26g.

During the whole growth period, the middle rice of Boyou Gan 28 was 150 ~ 155 days, and that of double late cropping was 140 days, which was 5 ~ 7 days longer than that of Shanyou 63. It can be used as medium rice and double late planting in south-central and western Jiangxi, and it is suitable to be planted in northern Jiangxi. The seedling age of this combination is flexible, and there is no early panicle phenomenon when the seedling age of double late planting is more than 40 days.

Boyou Gan 28 showed high yield in the trial and demonstration. In 1996, Pingxiang City demonstrated 20hm2 and tested the yield of 1.5hm2. The average unit yield was 8.67t/km2, which was 9.9% higher than that of Shanyou 63. In 1997, 32hm2 was planted in Yuannan Township, Luxi County, with an average yield of 8.4t/hm2 and the highest yield of 10.37t/hm2. According to the statistics of Jiangxi seed Station on the large-scale extension combination of hybrid rice in Jiangxi Province in 1997, the average unit yield of Boyou Gan 28 was 7.65t/hm2, which was 11.5% higher than that of Shanyou 63. It was listed as the main planting single night combination of Jiangxi Provincial Department of Agriculture in 1999. The combination has demonstrated and promoted 100000 hm2 in Jiangxi, Guangxi, Hainan and Guangdong.

According to the rice quality analysis of the crop Research Institute of Jiangxi Agricultural University, Boyou Gan 28 has brown rice rate of 79.9%, milled rice rate of 70.3%, head rice rate of 50.8%, 6mm of grain length, ratio of length to width of 2.5, chalky grain rate of 42%, chalkiness of 10.7%, alkali elimination value of 4.9%, gel consistency 34.5mm and amylose content of 16.6%. Most of the indicators meet the second-grade high-quality rice standards issued by the Ministry. It tastes good, soft and delicious. The appearance and eating quality of Shanyou 63 and Shanyou 10 were better than those of Shanyou 63 and Shanyou 10.

The combination showed good resistance to rice blast and bacterial blight in the field for many years.

Rice Institute of Jiangxi Academy of Agricultural Sciences

[region and technology] sowing at the right time, sparsely sowing enough to fatten and strengthen the seedlings. The double-night cultivation of Boyou Gan 28 was sown from June 1 to 4. The sowing rate was 112.5kg/hm2, and the field seed amount was 12~15kg/hm2. The best seedling age was 40-45 days, and the longest was not more than 50 days. The seedling field should apply sufficient basic fertilizer, sow evenly and sparsely, and paclobutrazol should be used in 1 leaf and 1 heart to promote early tillering so that there are 3 tillers per plant during transplanting.

Reasonable close planting. It is required to plant 240000 ~ 270000 holes / hm2 and 1 ~ 2 grain seedlings per hole to strive for 2.25 million ~ 2.55 million / hm2 effective panicle.

Fertilize and pipe water scientifically. Boyou Gan 28 is resistant to fertilizer and lodging, and has great potential to increase yield under the condition of high fertilizer. Pure nitrogen 160~180kg is needed per hectare, and fields should be provided with sufficient base fertilizer, top dressing as early as possible, and skillful application of strong seed fertilizer. Water slurry management to achieve the combination of dry and wet, and strictly prevent the water cut off too early in the later stage.

Pay attention to the control of diseases and insect pests to ensure high and stable yield.

Technical points of seed production: correctly arrange the sowing time. The local autumn parents had a difference of 16-18 days, with a leaf difference of 4.8-5.0, while in Hainan, the difference of spring sowing was 18-20 days, and the leaf difference was 5. The leaf difference shall prevail. Cultivate strong seedlings and transplant at the right time. The seedling field requires leveling, thinning and sufficient base fertilizer, the seedling age is generally no more than 20 days, and the leaf age is not more than 5.5 leaves. Other seed production techniques refer to Boyougui 99.