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geographic seed
相关语句
  地理种
     KARYOTYPE ANALYSIS OF 8 GEOGRAPHIC SEED SOURCES OF Cunninghamia lanceolata
     八个杉木地理种源的核型分析
短句来源
     CHROMOSOME G—BANDING PATTERNS OF 8 CHINAFIR GEOGRAPHIC SEED SOURCES
     八个杉木地理种源染色体G—带带型研究
短句来源
     THE ANNUAL GROWTH RHYTHMS OF TONGMIAN PINE,A GEOGRAPHIC SEED SOURCE OF Pinus massoniana
     马尾松地理种源桐棉松的年生长节律
短句来源
     G—bands were produced by an improved ASG method in root tip chromosomes of 8 geographic seed sources of Chinafir (Cunninghamia lanceolata). The bands obtained were numerous and along the whole chromosome.
     对8个杉木地理种源染色体的G—带带型进行分析,结果表明,各种源的带纹总致、带纹分布、纯合程度和带纹特征,均存在一定的差异。
短句来源
  “geographic seed”译为未确定词的双语例句
     RESISTANCE TO BROWN SPOT DISEASE OF GEOGRAPHIC SEED SOURCES OF SLASH PINE AND LOBLOLLY PINE AND SELECTION OF RESISTANT PHENOTYPES OF SLASH PINE INDIVIDUAL TREES
     湿地松、火炬松种源抗褐斑病试验和抗病优树选择
短句来源
  相似匹配句对
     ARTIFICIAL SEED
     人工种子
短句来源
     it was higher in geographic.
     地图状较点滴状高(P<0.01)。
短句来源
     KARYOTYPE ANALYSIS OF 8 GEOGRAPHIC SEED SOURCES OF Cunninghamia lanceolata
     八个杉木地理种源的核型分析
短句来源
     The seed of C.
     田野菟丝子C .
短句来源
     ON GEOGRAPHIC BOUNDARY
     论地理边界
短句来源
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Disease resistance to brown-spot needle blight of 7 geographic seed sources of slash pine and 10 of loblolly pine from USA was tested by planting 1~2 years old seedlings of these seed sources nearby a slash pine plantation which had been destroyed by brown-spot disease. The results showed that all the seed sources tested are highly susceptible to the disease although there are certain differences among them. 1~2 years old seedlings of 8 seed sources of slash pine from several provinces...

Disease resistance to brown-spot needle blight of 7 geographic seed sources of slash pine and 10 of loblolly pine from USA was tested by planting 1~2 years old seedlings of these seed sources nearby a slash pine plantation which had been destroyed by brown-spot disease. The results showed that all the seed sources tested are highly susceptible to the disease although there are certain differences among them. 1~2 years old seedlings of 8 seed sources of slash pine from several provinces in south China were tested by artificial inoculation with brown-spot fungus in nursery and the same result was obtained. The parent slash pine stands of these seed sources were established in 1930s and 1940s respectively with exotic seeds. In severely infected slash pine plantations, slightly infected or non-infected individual trees are commonly detected. These resistant phenotypes are probably due to inheritence. In 1982, 47 brown-spot disease resistant slash pine trees were selected from Fujian and propagated by grafting on stocks of 4-years old slash pine and loblolly pine which were moderately infected by brown-spot disease. After 3 growing seasons, most stock trees were severely infected, but there were 21 of 47 clones of slash pine out of infection or slightly infected.

用人工接种的方法比较国内的八个湿地松种源对松针褐斑病的感病性的结果表明,不同湿地松种源间感病性有差别,但没有达到可以利用它们进行病害防治的程度。自然感染的美国七个湿地松种源和十个火炬松种源也都表现高度感病。湿地松,黑松和火炬松是高度感病的树种,短叶松、长叶松和沙松感病中等,马尾松是高度抗病的。在松针褐斑病流行的湿地松幼林中选择了47株抗病优树,用自然感染法对各优树无性系的感病性测定表明,约有1/2的优树无性系是高度抗病的。

Fifteen geographic seed sources of eastern cottonwood (Populus deltoides Bartr.) from the southern United States were used in a provenance-rogeny-lonal test in western Mississippi. Eighty percent of the genetic variation among clones in fifth-ear height resulted from geographic genetic variation. Sixty-our percent of genetic variation in fifth-ear DBH and 21 percent of the variation in stem straightness were likewise associated with geographic differences. No genetic variation was observed...

Fifteen geographic seed sources of eastern cottonwood (Populus deltoides Bartr.) from the southern United States were used in a provenance-rogeny-lonal test in western Mississippi. Eighty percent of the genetic variation among clones in fifth-ear height resulted from geographic genetic variation. Sixty-our percent of genetic variation in fifth-ear DBH and 21 percent of the variation in stem straightness were likewise associated with geographic differences. No genetic variation was observed among local stands within source in any of these traits. Height, DBH, and straightness all increased from eastern to western origins but only fifth-year height increased from northern origins to southern origins.

本文对美洲黑杨15个南方地理种源进行了种源—子代测定。5年试验结果表明,不同地理种源对树高、胸径和树干通直度的总变异分别占64%、21%。同一种源的不同林分对树高、胸径和通直度总变异无显著影响。树高、胸径和通直度随着种源经度由东向西而增大,但随着种源纬度由北向南,只有树高生长相应增大。各性状的狭义遗传力较低,由于非加性方差很小,广义遗传力仅略大于狭义遗传力。通过种源—子代测定而建立的插穗生产区,树高和胸径的遗传增益比实生种子园高6~7%;树于通直度的遗传增益比实生种子园高2%。树高与胸径之间的遗传相关高达0.9以上,而树干通直度与树高或胸径的相关性很小(0.01~0.31)。

The karyotypes have been s'udied of 8geographic seed sources of Cunninghamia lanceolata(Lamb.) Hook from Huitong and Jianghua of Hunan province, Yongchuan and Hongya of Sichuan province, Rongshui of Guangxi Zhuang Autonomous Region, Yangxin and Tongshan of Hubei province, and Shaowu of Fujian province. The results show that the chromosome number of all the experimental materials is 2n=22. The karyotype formula of Rongshui provenance is K(2n)=22=22m(2SATs), and that of the others is K(2n)=22=20m(2SATs)+2sm....

The karyotypes have been s'udied of 8geographic seed sources of Cunninghamia lanceolata(Lamb.) Hook from Huitong and Jianghua of Hunan province, Yongchuan and Hongya of Sichuan province, Rongshui of Guangxi Zhuang Autonomous Region, Yangxin and Tongshan of Hubei province, and Shaowu of Fujian province. The results show that the chromosome number of all the experimental materials is 2n=22. The karyotype formula of Rongshui provenance is K(2n)=22=22m(2SATs), and that of the others is K(2n)=22=20m(2SATs)+2sm. All of the karyotypes belong to "1 B" type according to the classification of Stebbins, The chromosome 7 of Rongshui provenance is metacentric, but that of the others is submetacentric. There is no B-chromosome in all the seed sources except for a few cells of Rongshui provenance in which there is one B-chromosome. All of the materials have satellites in the short arms of the chromosome 4. They can be divided into two groups according to the homogeneity of the length between homologous chromosomes. The first group is more homologous in the length between two numbers of each of most chromosome pairs. It includes Tongshan, Huitong and Shaowu. The second is more heterologous. It includes the rest seed sources. The seed sources of the first group are ordinary except for Huitong. Those of the latter are superior, Determination of chromosome orders as well as identification and selection of superior provenances are discussed.

对八个杉木不同地理种源进行核型分析,结果表明,其染色体数目均为2n=12,其中广西融水杉木的核型公式为2n=22=22m(2SATs),其他种源第7对染色体为近中着丝粒,核型公式为2n=22=20m(2SATs)+2sm。核型类型为1B,第4对染色体短臂上有一对随体。融水杉木少数分裂相发现有一条B染色体,在研究中发现,同源染色体两成员长度差异对数多(核型杂合程度高)的种源,均系属于优良种源。而差异对数少的种源为一般种源(会同杉木除外),核型杂合程度的高低。可作为判定种源优劣的一种标志。

 
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