查询词典 mosaic dwarf

The PO activities in the leaves of four baize varieties with different susceptibility to maize dwarf mosaic virus were tested within one week after the plants were inoculated with the virus.

玉米矮花叶病毒病是世界性危害玉米最重的病毒病害之一，它给玉米生产造成很大的损失。

The results indicated that the incidence of virus disease in processed tomato was 63%~91% from 2005 to 2006. The field symptoms had various disease symptoms including mosaic, leaf streak necrosis, fernbrake leaf and malformation, curl leaf and dwarf etc., but mainly mosaic and leaf streak necrosis with infectious frequencies of 78% and 37%, and leaf streak necrosis symptom with mosaic was above 90%.

结果表明：加工番茄病毒病害2005~2006年间各地发病率达63%~91%，在田间主要表现为花叶、条斑坏死、蕨叶畸形、曲叶和矮化等多种病害症状，以花叶和坏死条斑为主，其中花叶占78%，条斑占37%，并且条斑症状90%以上都伴有花叶症状。

Maize dwarf mosaic disease is one of major problems in corn growing area all over the world. The disease can cause great economic damage in some areas.

玉米矮花叶病是国内外玉米产区分布最广、为害最重的病害之一，常造成严重的经济损失。

The aim of the study is to understand the effect of Tobacco etch virus on maize dwarf mosaic disease. In the net house, an experiment is carried out by means of artificial inoculation.

为了研究烟草蚀纹病毒(Tobacco etch virus， TEV)对玉米矮花叶病的预防效果，在防虫网室内，采用人工摩擦接种病毒的方法进行生物学试验，并用RT-PCR和实时荧光定量PCR技术对预防效果进行了检测。

A review on maize dwarf mosaic disease is presented,including its symptom,distribution,damage,host range,viral strain,viral transmission and control method.

介绍了玉米矮花叶病的症状、分布、危害、寄主范围、病毒株系、病毒传播及防治方法等方面的研究进展。

The result shows that 11.34% of SCMV CP is left in the pre-inoculated maize 50 days later, which indicates that maize dwarf mosaic disease can be alleviated through this method.

说明，SCMV能够有效地减轻玉米矮花叶病的发生及危害。

The main results were showed as follows:Through screen and identification of morphology in M_2 and M_3, respectively, the mutants with mutative traits of plant were found. In which, 11 mutations were leaf variations, including light-green leaf, deep-green leaf, durative yellowish leaf, temporary yellowish leaf, inlaid yellowish leaf, wrinkly leaf, smooth-edged curly leaf, splitting-shaped curly leaf, peduncular-shaped leaf, round leaf and larger leaf, 12 were mutations on plant type, including excessive branches, lacking branches, highness, dwarf-like, erect posture, reclinate posture, strong stalk, slender stalk, tufty branches, wrinkled plant, purple stalk and hair-covered plant, 14 were flower variations, including dense flowers, light-yellow petals, white petals, white-mosaic petals, wrinkled petales, back-rolled petals, narrow petals, larger petals, smaller petals, apetalous flowers, variable-numbered petals, fertile pistil protraction, sterile pistil protraction and multi-anther, and 5 were physiologic mutants, including genic male sterile, cytoplasmic male sterile, bud-dead, and early and later bloom.

主要结果如下：通过田间M_2筛选和M_3重复鉴定，在田间农艺性状方面共获得浅绿叶色、深绿叶色、转绿黄化叶、持续黄化叶、边缘黄化叶、皱缩叶、光叶型卷叶、裂叶型卷叶、薹叶形叶、宽圆叶和大叶等11种不同的叶部性状突变体；同时还筛选到多分枝、少分枝、高杆、矮杆、株型紧凑、株型松散、粗茎、细茎、丛生分枝、整株皱缩、紫茎、整株被毛等12种植株性状突变体，密花、浅色花瓣、白色花瓣、白斑花瓣、皱瓣、卷瓣、窄瓣、大瓣、小瓣、无瓣、花瓣数目不定、可育型柱头外露、不育型柱头外露和多雄蕊等14种花器性状突变体，以及细胞核雄性不育、细胞质雄性不育、死蕾、早花和迟花等5种生理性状突变体。

A total of 816 maize gemplasms were identified for resistance to maize dwarf mosaic virus and maize rough dwarf virus by natural infection in the field which is easy to be affect with the two diseases.

玉米矮花叶病和玉米粗缩病是近10年来为害我国玉米生产的两种主要病毒病[1]。

A 1.8 kb fragment of 3' terminus of the viral RNA was amplified by RT PCR, cloned and its sequence was determined. Sequence comparisons showed that it shared 71.5%～99.1% homology with isolates of sugarcane mosaic virus, 67.8%～68.5% with sorghum mosaic virus and 38.4%～48.4% with maize dwarf mosaic virus, indicating that the pathogen of this disease on maize in Hangzhou was sugarcane mosaic virus.

病毒RNA13'端序列(1.8kb)与甘蔗花叶病毒同源性最高，达 71.5 %～ 99.1%，与高梁花叶病毒同源性次之，为 6 7.8%～ 6 8.5 %，与玉米矮花叶病毒同源性最低，仅为 38.4%～ 48.4%，从而初步认为此病害由SCMV引起。

The nearly full-length CP sequence of 308 aa of SCMV-NCH was compared with the counterpart of SCMV, Sorghum mosaic virus, Maize dwarf mosaic virus; Johnsongrass mosaic virus, Zea mosaic virus and Pennisetum mosaic virus, the six virus species in SCMV subgroup in Potyvirus, respectively. A high level of sequence homology (86.2%) was observed between SCMV-NCH and SCMV-A, while only 56.4% to 72.2% sequence homology was found between SCMV-NCH and the other five virus species.

与SCMV亚组SCMV、高粱花叶病毒、玉米矮花叶病毒、约翰逊草花叶病毒、玉米花叶病毒、白草花叶病毒等6种病毒代表性株系外壳蛋白氨基酸序列同源性比较结果显示，SCMV-NCH与SCMV的同源性最高(86.2%)，与其他5种病毒同源性相对较低(56.4%~72.2%)。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。