共查询到20条相似文献，搜索用时 78 毫秒
1.
LIZhenyu ZHANGYunkang WUJianli 《中国水稻研究通报》1997,5(4):11-12
It has been proved that high yield combinations can be obtained via hybridization between indica and japonica rice. However, people have worried about the quality of this kind of rice for a long time. Our researches were mainly based on the mating pattern of “japonica male sterile line/indica restorer line” to generate and select elite japonicalinous crosses. Ricequality is shown in table 1 and 2. 相似文献
2.
YUXiaoping HeongKL HUCui 《中国水稻研究通报》1996,4(3):9-11
Egg parasitoids, Anagrus spp. and Oligositaspp. have been found to be important biological agents in suppressing rice planthoppers in Asian countries. However, most of these studies have been confined to conditions within rice fields. In this study, field surveys were made to study the floral and faunal diversity in various habitats surrounding rice fields. The rice and grass (Echinochloa spp.) plants were infested with 2 gravid females of brown planthopper Toya spp. or T. pusanus per tiller respectively for two days. The oviposited plants were:1) Rice plants bearing BPH eggs, 2) grass plants bearing BPH eggs, 3) grass plants bearing Toya spp eggs, and 4) grass plants bearing T. pusanus eggs. Above plants were placed in the rice field, the grassy area adjacent to rice fields and the grassy area away from rice fields, respectively. Potted plants with host 相似文献
3.
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
4.
Negative phototropism of rice root 总被引：3，自引：0，他引：3
Ｉｔｉｓｏｆｔｅｎｂｅｌｉｅｖｅｄｔｈａｔｔｈｅｓｔｅｍｏｆｈｉｇｈｅｒ ｐｌａｎｔｓｈａｓｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｐｏｓｉｔｉｖｅ ｐｈｏｔｏｔｒｏｐｉｓｍ，ａｎｄｔｈｅｒｏｏｔｓｈｏｗｓｎｏｐｈｏｔｏｔｒｏｐｉｓｍｏｒｎｏｓｅｎｓｉｔｉｖ ｉｔｙｔｏｌｉｇｈｔｔｈｏｕｇｈｔｈｅｒｏｏｔｏｆＡｒａｂ ｄｏｐｓｉｓｗａｓｒｅｐｏｒｔｅｄｐｏｓｓｅｓｓｉｎｇｃｈａｒ ａｃｔｅｒｉｓｔｉｃｓｏｆｎｅｇａｔｉｖｅ ｐｈｏｔｏｔｒｏｐｉｓｍ．Ｉｎｔｈｉｓｓｔｕｄｙ，ａｄｉｓｔｉｎｃｔｎｅｇａｔｉｖｅ… 相似文献
5.
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
6.
SUNZongxiu SIHuanmim 《中国水稻研究通报》1996,4(4):2-3
Anther culture is wide|y used in rice improvement and genome research. It is useful for gene transformation to stabilize foreign gene(s) and estimate the integrated copy number. 相似文献
7.
8.
《中国水稻研究通报》1995,(3)
In China, rice faces serious pest problem. About 347 pests attack rice plant in field, and 103 pests damage stored grain, powder and bran. Of those, at least 83 species can cause serious economic losses during rice production or storage. There exist four types of distribution of rice pests: 1. About 47.5% distribute over the south of the Qinling Mountain and the Huanghe River i.e. the South China rice cropping ares belonging to the Oriental region, e. g. Tryopryza incertulas (Walker). Catagella abjurella Walker, Chilo auricilia (Dudgeon), Susumia exigua Butler, Nephotet 相似文献
9.
In-situ conservation of Dongxiang wild rice 总被引：1，自引：0，他引：1
YINGCunshan CHENDazhou 《中国水稻研究通报》2000,8(3):6-6
Ｉｎ１９７８＿８２，ｔｈｅｎｉｎｅｃｏｍｍｕｎｉｔｉｅｓｏｆＤｏｎｇｘｉａｎｇｗｉｌｄｒｉｃｅ（ＤＸＷＲ）ｂｅｌｏｎｇｉｎｇｔｏＯｒｙｚａｒｕｆｉｐｏｇｏｎｈａｄｂｅｅｎｆｏｕｎｄｓｃａｔｔｅｒｉｎｇ ａｂｏｕｔ２＿３ｈｅｃｔａｒｅｓｉｎＤｏｎｇｘｉａｎｇ Ｃｏｕｎｔｙ ｏｆＪｉａｎｇｘｉＰｒｏｖｉｎｃｅ．Ｄｏｎｇｘｉａｎｇｉｓｓｉｔｕａｔｅｄａｔ２８°１４′Ｎ，１１６°３６′Ｅａｎｄｅｌｅｖａｔｉｏｎｏｆ４７．６ｍ，ｂｅｌｏｎｇｉｎｇｔｏｔｈｅｚｏｎｅｏｆｒｅｄｓｏｉｌ．Ｉｔｉｓｔｈｅｎｏｒｔｈ… 相似文献
10.
《中国水稻研究通报》1998,6(4):12-12
The pure seeds of rice varieties Zaoxian 6188, D6049: late indica Minghui 63. Waiqi, and Xiangge 7301 late japonica Nonghu 6 and Bei K15 were carried by satellite 921006. After the satellite returned, we colleeted, planted, and tested the variances eaused by space inducing, with a part of seeds for eaca CK on the ground. 相似文献
11.
ZHANGBAOZhao YINGHaodong XUYicheng 《中国水稻研究通报》1998,6(1):9-11
Conventional machine harvesting involves cutting, collecting, transporting operation before the grain is threshed (Cutting prior to threshing-CPT), and the handling of quantity of straw, The stripper harvesting system strips the grain as well as small scraps of leaves and stalk from the crop while the straw is unharvested, 相似文献
12.
《中国水稻研究通报》2002,(Z1)
With the rapid development of molecular biological technology, transfering foreign genes into crops has become an increasing routine, and making it possible to induce the genes encoding C4 photosynthesis enzyme into C3 plants. Ku et al firstly introduced the intact gene of maize PEPC, the key enzyme in C4 photosynthesis into C3 crop rice, and the transgenic rice plant showed high 相似文献
13.
14.
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
15.
16.
《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
17.
《作物学报(英文版)》2015,(1)
In rice–wheat rotation systems, crop straw is usually retained in the field at land preparation in every, or every other, season. We conducted a 3-year-6-season experiment in the middle–lower Yangtze River Valley to compare the grain qualities of rice under straw retained after single or double seasons per year. Four treatments were designed as: both wheat and rice straw retained(WR), only rice straw retained(R), only wheat straw retained(W), and no straw retained(CK). The varieties were Yangmai 16 wheat and Wuyunjing 23 japonica rice. The results showed contrasting effects of W and R on rice quality. Amylopectin content, peak viscosity, cool viscosity, and breakdown viscosity of rice grain were significantly increased in W compared to the CK, whereas gelatinization temperature,setback viscosity, and protein content significantly decreased. In addition, the effect of WR on rice grain quality was similar to that of W, although soil fertility was enhanced in WR due to straw being retained in two cycles. The differences in protein and starch contents among the treatments might result from soil nitrogen supply. These results indicate that wheat straw retained in the field is more important for high rice quality than rice straw return, and straw from both seasons is recommended for positive effects on soil fertility. 相似文献
18.
《中国水稻研究通报》1997,(1)
We analyzed the inheritance of fragrance bysoaking rice grains or leafblades in 17g/l KOHsolution, using scented rice (Shengxiangjing 4)and non-scented rice (Huxuan 19 and Lao-laiqing) as materials. The F_1 plants of various crosses did notpresent fragrance. In the F_2 the segregating ra-tio of fragrance and non-fragrance plants and 相似文献
19.
TAOLongxing WANGXi DUANBinwu YUMeiyu HUANGXiaoling 《中国水稻研究通报》1998,6(3):9-10
Intersubspecies hybrid rice have strong heterosis but low seed-setting rate, Researches have showed that most of unfilled and partiallyfilled grains occurred in late-flowering spikelets on the base of a panicle, which usually maintain quiescent state for a period after flowering. 相似文献
20.
《中国水稻研究通报》2002,(Z1)
Polyphenols, teroens, and resins make it difficult to obtain high quality genomic DNA from rice. Four extraction methods were compared in our study, and CTAB precipitation was the most practical one.Materials used were old leaves from F5 transgenic rice in Hainan and fresh leaves from F5 transgenic rice in Kunming.Procedures of the four methods were as follows:1. Basical method: powder 1 g old or new leaves → added 2 ml extraction solution (100 mmol/ L 相似文献