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fertility variation
相关语句
  肥力变化
     Relationship between plant community succession and fertility variation of mountain yellow soil in east Chongqing.
     渝东山地黄壤肥力变化与植物群落演替的关系
短句来源
     Study on Fertility Variation of Dryland Changed into Paddy Field in Shajiang Meadow Soil.
     砂姜黑土旱改水肥力变化的研究
短句来源
     Soil Fertility Variation of Mixed Forest Planted on Sites of Continuously Planting Chinese Fir
     杉木多代连栽地营造混交林土壤肥力变化
短句来源
  育性变异
     An Observation on Male Fertility Variation of R1 and R2 Generations in Somaclones of Rice(Oryza sativa L.)
     水稻体细胞无性系R_1、R_2代中的雄性育性变异观察
短句来源
     Research on fertility variation and genetic characters of photoperiod-sensitive wheat male sterile line (A31)
     光敏小麦雄性不育系A31的育性变异及遗传研究
短句来源
     Fertility Variation of Wheat Photoperiod-sensitive Male Sterile Line (A31) in Different Ecological Areas
     小麦光敏雄性不育系A31在不同生态地点的育性变异
短句来源
     Through out the multi-area experiments in 7 different ecological areas, the male fertility variation of photoperiod-sensitive male sterile line wheat (A31) was studied.
     本研究采用在7个不同生态点的多点试验,对光周期敏感小麦雄性不育系A31的雄性育性变异进行了研究:采用分期播种试验和室内人工控光试验对A31的育性转换机制和光周期敏感阶段进行了研究;
短句来源
     1. The results of experiments carried out in 7 ecological areas in Kunming, Yuanmou of Yunnan, Yangling of Shaanxi, Huzhu of Qinghai ,Shijiazhuang of Hebai ,Wuwei of Gansu and Yi'an of Heilongjiang showed that A31 had obvious fertility variation.
     1.在所选择的云南昆明、元谋、陕西杨凌、青海互助、河北石家庄、甘肃武威、黑龙江依安七个生态点的试验结果表明,A31表现明显的育性变异。 试验点的海拔与A31育性并无明显相关关系,而A31育性有明显的随纬度增加降低的趋势。
短句来源
  “fertility variation”译为未确定词的双语例句
     QTL qRF-10-1,mapped onto the interval RM258-C16 of chromosome 10,produced the largest effects on both the two traits,accounting for 24% of the spikelet fertility variation and 17% of the pollen fertility variation.
     效应最大的QTL为qRF-10-1,该QTL位于10号染色体RM258-C16标记区间,对小穗育性表型变异的贡献率为24%,对花粉育性的贡献率为17%,且该QTL被检测到的LOD值显著较高,因此是1个主效QTL,其增效基因来源于特青。
短句来源
     Fertility variation was not significant between 200 and 600 m, but was highly significant between 200 and 800 m.
     其中,±600m的温度变化处于±200m与±800m之间,且倾向于±800m的变化。
短句来源
     ANALYSIS OF THE TRACE ELEMENTS AND SOIL FERTILITY VARIATION FACTORS IN SOIL
     土壤里的微量元素与土壤肥力变异因子关系分析
短句来源
     Based on the data from the experiment “joint ecological determination of new sterile lines” at Sanya, Wuchang, Nanjing, and Guiyang in 1997-1998, fertility variation of Pei′ai64S(a low temperature sensitive sterile line) and N5088S(a photoperiod sensitive sterile line)under different daylength and temperature condition was analyzed.
     针对夏季低温对我国两系杂交稻制种生产的严重威胁 ,用 1997~ 1998年由三亚、武昌、贵阳、南京 4个生态点组成的“新不育系联合生态鉴定”试验资料 ,分析了以培矮 6 4S为代表的实用低温敏类型不育系和以 N5 0 88S为代表的实用光敏类型不育系的育性光温影响规律。
短句来源
     Principal component analysis was used to derive soil fertility variation factors.
     运用主成分分析选取土壤肥力变异因子。
短句来源
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  fertility variation
The findings reveal that the individual's socioeconomic background was important in explaining earlier fertility variation.
      
Fertility variation, measured as `sibling coefficient' (1.7 in CSO-I and 8.3 in CSO-II), was high in CSO-II resulting in high coancestry and low effective population size (3 times lower than CSO-I) in the seed crop.
      
Impact of Fertility Variation on Gene Diversity and Drift in two Clonal Seed Orchards of Teak (Tectona grandis Linn.
      
Selection for tree diameter would improve predicted diversity of the seed crop as it was positively correlated with reproductive output and negatively correlated with fertility variation among trees.
      
The fertility variation, Ψ was on average around 3 and correspondingly the relative effective population size, Nr?=?0.36 and the variance effective number around 60.
      
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Three types of PGMS and TGMS lines were grown at different altitude, i..e. 200, 600, 800 and 1,100 m above sca level, and their fertility was observed. At the same altitude, pollen fertility varied with varieties. M901s showed a long and stable sterile period, its sterility percentage being over 98%. 8912s and NJ28s appeared much less stable. Altitude had a considerable effect on the fertility of the varieties studied due to the changes in temperature associated with altitude. Fertility...

Three types of PGMS and TGMS lines were grown at different altitude, i..e. 200, 600, 800 and 1,100 m above sca level, and their fertility was observed. At the same altitude, pollen fertility varied with varieties. M901s showed a long and stable sterile period, its sterility percentage being over 98%. 8912s and NJ28s appeared much less stable. Altitude had a considerable effect on the fertility of the varieties studied due to the changes in temperature associated with altitude. Fertility variation was not significant between 200 and 600 m, but was highly significant between 200 and 800 m. At an altitude of 1,100 m, the temperature seemed too low to ensure normal growth of the crop. It is, therefore, recommended that locations at 200 m and 800 m be selected as the representative points for the identification of pollen fertility of PGMS and TGMS lines of rice with the data obtained at 1,100 m as a reference.

利用3个不同类型的两用核不育系,研究了不同海拔高度对两用核不育系育性的影响。结果表明,不同材料在同一海拔高度的育性变化不同,M901S不育期长且稳定,8912S次之,NJ28S较差。不同海拔高度由于存在明显的温度差异,因此对两用核不育系的影响明显不同。其中,±600m的温度变化处于±200m与±800m之间,且倾向于±800m的变化。育性变化±200m和±600m呈不明显的差异,变化趋势一致,±800m的差异较大,±1100m温度过低,对稻株的发育可能不利。我们认为,可选择±200m和±800m为鉴定的两用核不育系育性稳定性的生态代表点,±1100m的鉴定结果可作为参考指标。

Principal component analysis was used to derive soil fertility variation factors.The accumulate distribute of three principal component reached 85,21%, which were named as organic matter factor; acidity factor; texture factor. Using the scorces of the principal component factors of the samples as independent variables, the content of soil trace elements as dependent variable, stepwise regression analysis was performed to obtain a regression function. According to the corefficient of the function, the magnitude...

Principal component analysis was used to derive soil fertility variation factors.The accumulate distribute of three principal component reached 85,21%, which were named as organic matter factor; acidity factor; texture factor. Using the scorces of the principal component factors of the samples as independent variables, the content of soil trace elements as dependent variable, stepwise regression analysis was performed to obtain a regression function. According to the corefficient of the function, the magnitude of the stationed soil fertility variation factors affect the accumulation and movement of the soil trace elements.

运用主成分分析选取土壤肥力变异因子。三个主成分的累积贡献率达85.21%,分别命名为:有机质因子、酸碱度因子、质地因子。将各样品的主成分因子得分作为自变量,土壤微量元素含量作为因变量,进行逐步回归分析,得到回归方程。根据方程的回归系数大小可以评价各肥力变异因子对土壤微量元素累积和迁移的作用大小。

Based on the data from the experiment “joint ecological determination of new sterile lines” at Sanya, Wuchang, Nanjing, and Guiyang in 1997-1998, fertility variation of Pei′ai64S(a low temperature sensitive sterile line) and N5088S(a photoperiod sensitive sterile line)under different daylength and temperature condition was analyzed. The results showed that the fertility of Pei′ai64S was dominantly affected by temperature and unstable,the critical low temperature for fertility conversion were...

Based on the data from the experiment “joint ecological determination of new sterile lines” at Sanya, Wuchang, Nanjing, and Guiyang in 1997-1998, fertility variation of Pei′ai64S(a low temperature sensitive sterile line) and N5088S(a photoperiod sensitive sterile line)under different daylength and temperature condition was analyzed. The results showed that the fertility of Pei′ai64S was dominantly affected by temperature and unstable,the critical low temperature for fertility conversion were different among years and cities; and that of N5088S was dominantly affected by daylength, difference of critical daylength for fertility conversion was small in different years in a city,but large in different cities. According to daily mean temperature and theoretical daylength in 1951-1992, space/time patterns in the southern rice region(18°14′-34°17′N), including the areas of Sanya, Nanjing, Guangzhou, Fuzhou, Changsha, Hangzhou, Gaoyou,and Xuzhou, were assessed. From an ecological opinion, three techniques for overcoming cool summer injuries to the production of such rice seeds are presented, which are: selecting a appropriate region in a climatic condition; changing seeds production season from autumn to spring in double cropping rice areas, or moving to higher region of single rice cropping region for seeds production at autumn; evaluating comprehensively the features of temperature and photoperiod sensitive sterile lines, and rationally utilizing photo thermo sensitive sterile line based on climatic condition.

针对夏季低温对我国两系杂交稻制种生产的严重威胁 ,用 1997~ 1998年由三亚、武昌、贵阳、南京 4个生态点组成的“新不育系联合生态鉴定”试验资料 ,分析了以培矮 6 4S为代表的实用低温敏类型不育系和以 N5 0 88S为代表的实用光敏类型不育系的育性光温影响规律。结果表明 ,培矮 6 4S的育性受温度影响 ,育性稳定性较差 ,下限温度指标年际间和地区间变化较大 ;N5 0 88S育性主要受日长影响 ,其临界光长同一地年际间差异小 ,但地区间差异较大。同时 ,用 195 1~ 1992年逐日平均气温和理论日长资料 ,分析和评价了我国南方稻区 (18°14′~ 34°17′N)的三亚、南京、广州、福州、长沙、杭州、南京、高邮、徐州等 9个城市的光温特征及其时空规律。在此基础上 ,从生态角度提出了克服夏季低温危害两系杂交稻制种的三项生态技术措施 ,一是要根据气候规律正确选择适宜的制种地区和季节 ;二是华中双季稻区应改秋制为春制或选择山区单季稻区秋制 ;三是应全面评价温敏和光敏类型不育系的特点 ,因气候合理地利用现有的水稻不育系资源

 
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