共查询到20条相似文献,搜索用时 31 毫秒
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In saline paddy soil in the north of China, the technique of immunization of rice nursery (IRN) was applied in 1990‘s and succesfuully met the production needs. It had more advantages than paddy soil land nursery (PSLN). 相似文献
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To use common differential varietiesin the world, a set of internationaldifferential varieties, including 6 in-dica and 2 japonica rice varieties,were set up in the midddle of 1960s;in 1976, a set of differential varietiescmposed of 9 japonica varieties withknown resistance gene were estab-lished; and later a set ofnear-isogenic lines (NILs), 4 lines 相似文献
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《中国水稻研究通报》2002,(Z1)
Rice blast, caused by Magnaporthe grisea, is one of the most important rice diseases in China. Resistance breakdown often happened, especially in the field supplied with high nitrogen fertilizer. In the simulation study on race dynamics and cultivar-race interaction on population level, the influence of nitrogen on the relative parasitic fittness of cultivar-race combinations should be realized quantitative-ly. 相似文献
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TANGuangxuan 《中国水稻研究通报》1998,6(4):6-7
Wild rice is an important resource of useful genes to rice breeders. However, low regeneration frequency is an obstacle to use the valuable genes. We used desiccation to improve the regeneration frequency and studied the biochemical changes of calli of wild rice after desiccation, 相似文献
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《中国水稻研究通报》1997,(1)
Chalkiness is an unpleasant trait for rice con-sumer. which is known to be controlled geneti-cally and affected by environment during grainmaturing. We used the model of Additive MainEffects and Multiplieative Interaction (AMMI)for interpreting the result of genotype by env-iornment interaction (G×E) in the chalkinessof indica rice varieties. 相似文献
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Some locally available fruits and vegetables of the arid zone of Rajasthanwere analyzed for their -carotene content; the selected fruits and vegetables were: Dansra (Rhus myserensis), Kachri (Cucumis collosus), fruit Kachri (Cucumis collosus), Kair (Capparisdecidua) and Sanghri (Prosopis cineriria). The -carotene contents of the samples were estimated in fresh and various processed states (blanched, dried and roasted). The results showed the heat lability of -carotene. Among the samples, kair was found to be the richest source of -carotene. Variety, too, had an impact on the content of this fat soluble vitamin. 相似文献
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ZENGXianming LAIWenjiang XUDong 《中国水稻研究通报》1996,4(2):7-7
The leaf streak of rice is one of the seedborne and quarantine bacterial disease in China. The rice seeds must be strictly inspected to prevent the disease from spreading. The serological test is a rapid and accurate method of identifying seedborne bacterial plant pathogens. But the specificity and thus reliability of any serological method depend first on the specificity of the antiserum. Therefore, a high specificity of antiserum is always required for and has become a key in detecting the leaf streak pathogen in rice seeds. The present study was conducted on the method of improving the specificity. Two group of antigen, the yellow and white proteins, were extracted from the cells of Xanthornonas oryzae pv. oryzicola by the methods of stepwise precipitation with ammonium sulfate and differential centrifugation. Antiserum A and B against the yellow and white proteins were each produced in white rabbit immunized with the proteins respectively. The tittle of the two antiserum were the same(1: 6400). 相似文献
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WANGXi YUMeiyu YAOFude 《中国水稻研究通报》1995,3(2):2-4
The experiments were carried out in paddy field of CNRRI in 1985-1989. Seedlings of the indica variety Erjiufeng were raised in a seedbed and transplanted to pots with area of 0.1 m~2 at seedling age of 30 d. Treatments with (CRMS) were conducted at different stages: pistil and stigma primordium formation 相似文献
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ZHANGXianguang LUXinggui 《中国水稻研究通报》1995,3(3):4-5
Rate of exserted stigmas (RES), ie. the ratio of glumes with exserted stigmas to the total glumes is one of the most important characteristics which affects the out-crossing rate of its combinations. Sixteen P(T) GMS lines with different ecotypes were used to study the variations of RES during their stable sterile period in Wuhan from 1992—1993. Ten healthy panicles were randomly selected at full anthesis. Their colour and the number of glumes showing one-side or two-side exserted of stigmas were investigated. Table 1 showed that there were a great variations of RES among the 16 lines tested in two consecutive years (c.v.=43.38%) and among the 相似文献
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《中国水稻研究通报》1994,(1)
Magnetizing seeds of crops has been a new agrophysical technique in recent years. The experiment of magnetized rice seeds by Seed-Magnetizer was conducted in Yuping Dongzu Autonomous County, Guizhou Province, China in 1991. The seeds of three rice varieties (Wenyou 3, Shuanggui and Teqing) were treated with SG-I Seed-Magnetizer.They passed through the Seed-Magnetizer with the passing rate 4000g / min for three separate times. The magnetic field gradient was 10t/m and the magnetic flux 6.5×10~4 t / m~2. And then, the magnetized seeds and non-magnetized seeds (CK) were simultaneously sowed on Apr 24, transplanted on 相似文献
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ZHANGZhitao FUQiang 《中国水稻研究通报》1994,2(2):10-11
Study on the behaviour and mechanism acoustic communication (AC) in rice planthoppers (RPHs) have been conducted at CNRRI and Hangzhou Applied Acoustic Research Institute since 1986. Researchers have developed techniques for monitoring and playing back the acoustic signal (AS) of RPHs, and have made important breakthroughs in several aspects of AC. 相似文献