查询词典 heterosis

Based on the obvious xenia effects of high oil and heterosis, a technique called TEU(three-effect-utilization) was developed to pyramid the cytoplasm male sterile effect, heterosis and xenia of oil content into a production system, which has patented in China.

从20世纪20年代开始，玉米杂种优势利用经历了综合种、双交种、三交种、单交种阶段，每一次利用方式的改变都使玉米生产的水平得到了很大的提高。

Crossing combinations of Soybean heterosis were stadied i n 1996～2000. The first yield test indicated that the soybean had clea r heterosis . At the same time, 161 comparative high-superiority combinatio ns selected by the test amounted to 80.9%in total. And 69 combinations are amang the high-superiority crosses in total with 34%.

经过1996～2000年5年的研究，共配制杂种优势测定组合199个，通过第一次产量鉴定表明，大豆具有明显的杂种优势，并筛选出F1超高亲、超对照优势率均为正值，且二者平均值大于10％的较强优势组合161个，占全部组合的80.9％。F1 超高亲、超对照优势率均大于20 ％的高优势组合69个占全部组合的34％。

This work dealt with formation mechanism of heterosis of cocoon quality characters bymeans of physiological,biochemical and biometrical techniques for the purpose to providetheory guidance for adequate and predicatable application of heterosis.

本研究用生理生化及生物数学的分析方法，探索家蚕茧质性状杂种优势的产生机理，以期为生产上合理地、有预见地利用杂种优势提供理论指导。

In this study, through the traditional methods, analysis of combining ability and heterosis, and modern SSR marker technique, the combining ability, heterosis, genetic distance and heterozygosity between introduced Yugoslavia inbreds and important lines representing different heterotic groups in our country were studied, which will greatly influence to make full use of those indroduced lines.

本研究采用传统的配合力和杂种优势分析与现代的SSR分子标记技术相结合的方法，探讨引进南斯拉夫玉米自交系与我国不同优势类群骨干自交系的配合力、杂种优势、遗传距离和杂合性，为引进自交系的高效合理利用提供理论依据；并通过各项遗传指标与F1产量的相关分析，探讨各项指标预测杂种优势的可行性和效果。

The 1000-grain weight heterosis was mainly due to the grain fresh weight heterosis at 12 DPA and 22 DPA that the intervarietal hybrid had, and also due to its promotion of 2 kinds of hormone IAA and CTK 12 DPA, the IAA function extended to 22 DPA.

品种间杂种也具有一定的千粒重杂种优势，这与12天、22天籽粒的鲜重优势有关，籽粒发育早期（12天）2种促进型激素IAA和CTK促进籽粒生长，与其获得较大的鲜重优势有关，IAA的促进作用可延伸到22天。

The obvious heterosis was shown in eggplant(Solanum melongena L.). Production of hybrid seeds using male-sterility as female parent was a very important way in application of eggplant heterosis.

茄子有很强的杂种优势，利用雄性不育系做母本生产杂种一代是利用茄子杂种优势的重要途径之一。

Accordingly we start from the definition of heterosisH=F1-MP,where H is heterosis, F1 is the first generation offspring, MP is the mean of the parents or midparent, and from the use of a binomial random variable and its extention to the multinomial case derive the basic relations of heterosis with its components.

另一在原文中未加说明的原因是，用配合力概念需要无穷多个品系才能和遗传力的结果相比较，仅此一点就把配合力的作用排斥掉了。文中的主题是杂种优势老大难题可以用笛卡尔的推理方法来解决。

The analysis of correlation indicated that tobacco breeding with higher potassium content has the characteristics of higher stalk height, wider stalk circumference, longer leaf and more leaf number comparatively. The correlations between potassium content and nicotin among top, middle and bottom tobacco leaves were all negative. The correlation among potassium content and malondialdehyde,superoxide dismutase, conductance ratio; and protein, solubility sugar, chlorophyl and free water/bondage water were all attained marked level, however, the essence of correlation was different: the former was negative but the latter was positive. 4.The analysis of heterosis demonstrated there were different degree heterosis in the potassium content of tobacco leaf and other correlated characters, including agriculture, physiology and biochemistry.

相关分析表明，烟叶钾含量性状与株高、茎围和最大叶长的相关性达到了显著和极显著的水平，与叶数的相关虽未达到显著水平，但相关程度相对较高；烟叶钾含量与烟碱在上、中、下三部位叶之间均呈负相关关系，中部叶烟碱与烟叶钾含量的相关达到了极显著水平；烟叶钾含量性状与丙二醛、SOD和电导率以及与蛋白质、可溶性糖、叶绿素和自由水/束缚水之间的相关性均未达显著水平，但相关性质不同，烟叶钾含量性状与前三者之间表现负相关关系，而与后四者之间呈正相关关系；4。

Is one of the most important vegetable crops, it shows remarkable heterosis, producing hybrid seed using Cytoplasmic Male Sterile line as female parent is a very important way to utilize the heterosis in radish.

是一种非常重要的蔬菜作物，其具有明显的杂种优势，以细胞质雄性不育系为母本，实行三系配套的制种方式是萝卜杂种优势利用的重要途径。

In order to understand the molecular basis of heterosis, modified differential display of mRNA was used to characterize the difference in gene expression between cross-fertilized and self-fertilized kernels, reciprocal cross-fertilized kernels and their parents during the early stages of seed development by using 3 wheat hybrids with different level of heterosis.

本研究旨在利用mRNA差异显示技术探讨小麦杂交种子和自交种子以及正反杂交种子与其双亲在种子发育前期的基因表达差异，同时对杂种优势利用的模式作物玉米的杂交种子和自交种子的基因表达差异也进行了研究，并对典型的差异表达片段进行了克隆测序，为揭示杂种优势形成的分子机理积累了更多的资料，取得的主要结果如下

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。