Kenyou 12 (original code name wd06) (rice)
Breeding unit: Hebei Rice cropping Research Institute.
Approval: approved by Hebei crop Variety approval Committee in 1997 and by the National crop Variety approval Committee in 1999.
Variety approval number: national examination and approval rice 990004.
Variety source: Jijing 8 / Zhonghua 8 / / Kandong 100.
Characteristics: ideal plant type, plant height 100m / 120cm, stalk stout and tough, leaves green and erect, good posture to light, high light energy efficiency, ear length 16-18cm, grains per panicle 100ml / 110, 1000-grain weight 25Mel 27g, rice glume tip brown, belongs to large panicle and large grain type variety. Brown rice rate 83.41%, milled rice rate 75.45%, head rice rate 73.04%, chalkiness rate 20%, chalkiness 1.5%, crude protein 7.4%, gelatinization temperature 7, gel consistency 85 mm, amylose 24.1%, transparency 1. The growth period is 170 days in Beijing, Tianjin and Tang areas. It has strong cold resistance, fertilizer resistance and lodging resistance, high yield and the main rice quality index is better than the control. Participated in the national northern rice regional test from 1996 to 1997, the average yield per mu in two years was 539.7 kg, which was 12.1% higher than that of Jindao 1187. In 1998, he participated in the national production experiment, with an average yield of 614.5 kg per mu, 10.9% higher than that of Jindao 1187. High yield, stable yield and wide adaptability.
Main points of cultivation: the suitable sowing date is from April 1 to April 10. The dry cultivation technique should be adopted, and the row spacing should be 30 cm X 15 cm. In general, it is appropriate to apply pure nitrogen 17 Mu 20 kg per mu. Pay attention to the prevention and control of diseases and insect pests such as sheath blight.
Suitable scope: one-season rice cultivation in Beijing, Tianjin and Tang areas.
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Scientists design rice genes to breed new varieties
Rice has a richer fruity flavor, higher iron and zinc content, and no need to supplement other nutrients, all of which can be achieved through molecular design of rice genes. A few days ago, the author learned from the symposium on "Crop Molecular Design and Innovation" that China is currently building a huge biological information infrastructure platform to ensure that high-quality genes "hit the target". Zhu Yingying, academician of the Chinese Academy of Engineering, said that rice, for example, is preferred for soft and waxy japonica rice, and people also want rice to have a stronger flavor or a special flavor such as "fruity flavor." and
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Four passes to control rice sheath blight
In recent years, sheath blight has become the most important disease of rice, and has four major characteristics: first, a wide range of occurrence. Second, there are very few varieties resistant to sheath blight. Third, the harm is becoming more and more serious, even causing lodging through the top. Fourth, the disease is first caused by the lower part of the rice plant, which is easy to ignore and miss the favorable opportunity for prevention and control. It is the key to strictly control the four hurdles in the prevention and control strategy. 1. Salvage sclerotia sheath blight mainly overwinters in rice fields in the form of sclerotia. When overwintering sclerotia pass through winter and spring to early rice transplanting, 60% to 70% of sclerotia can germinate. Most of the sclerotia are lighter than water and longer.
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