查询词典 sterility

The approaches for decreasing the gene flow include chloroplast transformation, pollen sterility, seed sterility, cleistogamy, apomixis, temporal control, and transgenic mitigation.

目前降低外源基因扩散的方法主要有叶绿体转化、花粉不育、种子不育、闭花受精、无融合生殖、暂时性控制及转基因缓和等。

Its contents are as follow: A description for the characteristics of Agropyron elongatum and its genome; the methods used to overcome the cross-sterility and hybrid sterility; the cross breeding procedure and the genetic analysis for it; the selected hybrids which are the Triticum-Agropyron octoploid species, the alien addition lines, the alien substitution lin...

内容介绍了长穗偃麦草的特性和染色体组型，克服杂交不育和杂种不育的方法，杂交育种的程序及其遗传分析和选出的小偃麦八倍体种、异附加系、异代换系与丰产抗病的小偃麦新品种。

The dominant male sterility was expressed normally in the new Taigu genic sterile wheat carrying the intergenomically translocated Ms2, and the female fertility mechanism in its male sterile plants was normal as well. Observation of the chromosome configuration at meiosis of pollen mother cells of the young ears of the sterile plants showed that they were euploid plants (2n=42). No configurations different from those of the Taigu geneic sterility gene located at the original locus were noticed of the Ms2 intergenomically translocated back into the common wheat.

所获携带易组Ms2基因的新型太谷核不育小麦其显性雄性不育特性表达正常，且雄性不育株的雌性可育机制正常，对不育株幼穗花粉母细胞减数分裂期染色体构型的观察可见其为整倍体(2n=42)，尚未发现回归普通小麦的易组太谷核不育基因与原位点的太谷核不育基因有不同的表型。

Cytoplasmic male sterility is a maternally inherited trait in which higher plants fails to produce functio...

细胞质雄性不育(Cytoplasmic male sterility，CMS)普遍存在于高等植物中，是生产上广泛利用杂种优势的基础。

Purpose: To explore and make big rats model of sterility caused by chronic salpingitis, observe the effect of Tongluozhuyunfang on the pathology and morphallaxis of oviduct, interleukin IL-2、IL-6 in serum and oviduct, and trace the rats pregnant rate for exploring its curative mechanism.

中文题名通络助孕方对炎性不孕大鼠输卵管作用的实验研究副题名外文题名 Experimental study on mechanisms of Tongluozhuyunfang treated rats salpingitis sterility 论文作者赵广兴导师马宝璋袁家麟教授学科专业中医妇科学研究领域\研究方向学位级别博士学位授予单位黑龙江中医药大学学位授予日期2002 论文页码总数63页关键词不孕症通络助孕方输卵管炎馆藏号BSLW /2003 /R271.1 /4 目的：探索制作慢性炎症所致不孕大鼠模型，探讨中药通络助孕方对慢性炎性不孕大鼠输卵管病理形态学、细胞因子IL-2、IL-6和受孕率的影响及其疗效机理。

This paper summarized the experiments which support or negate the existence of female sterility,analyzed the experimental ideas and inference methods of these experiments,especially Sano' s;and concluded that the conclusion that the hybrid sterility is only caused by male or female sterility is a one - sided view,therefore attention should be paid to the genetics of both female and male sterility.

本文对证明水稻亚种间杂种存在和不存在雌性不育的研究进行了综述与分析，从中可以看出无论是认为水稻亚种间杂种不育性表现为雄性不育还是雌性不育的结论都有一定的片面性；尤其是Sano证明基因座S-5不存在的研究存在较大的缺陷。因此，水稻亚种间杂种雌雄配子败育对小穗育性影响的大小有待进一步研究。

In Japonica heterosis utilization, the purity of hybrid seeds was sometimes low due to the self-fertility and/or unstable sterility of some BT type Japonica cytoplasmic male sterile lines. For the WA type Japonica CMS lines, their sterility is much stable, but there is also some difficult to take use of them because their flowering habit is bad and it is very difficult to restore their fertility. The HL type CMS lines were identified to have the same flowering habit and outcrossing rate with the BT type CMS lines in Japonica hybrid rice. Moreover, the sterility of HL type CMS lines was more stable than that of BT type, and their restorable characteristics was better than that of WA type.

部分BT型粳稻不育系存在自交结实现象，不育性的稳定性较差，影响杂交种的纯度；WA型粳稻不育系虽然不育性稳定，但开花习性差，育性最难恢复，应用难度较大；HL粳稻不育系开花习性及异交结实率与BT型粳稻不育系无显著差异，育性稳定性明显好于BT型粳稻不育系，可恢复性明显好于WA型粳稻不育系，较好地协调了育性稳定性、开花习性和可恢复性几方面的矛盾。

Cytoplasmic male sterility, which eliminates the possibility of self-pollination, is a commonly observed phenomenon in the plant kingdom and has been exploited for hybrid seed production.

细胞质雄性不育(Cytoplasmic male sterility， CMS)广泛存在於高等植物中，是雄性不育中最重要的类型之一。

In different treatments there were significant differences in male sterility among INACs, of which I TA showed the highest rate of sterility and the best sterility stability under different conditions; meanwhile, altering nucleo cytoplasmic relationship by substitutional backcrosses could modify and improve male sterility of CMS lines.

结果表明，同核异质不育系不育度在年份间、播期间、实生稻与再生稻间差异极显著，不同细胞质不育系间差异显著，其中I特A在各种处理条件下均表现出最高的不育度和最好的不育稳定性。通过回交核置换技术培育新核质关系的同核异质不育系，可达到修饰改良育性的目的。

The results showed that the varieties and activity of POD isoenzyme expression exist in difference in anther of male sterility line and maintainer in different development stage in sweet pepper and hot pepper. POD isozyme activity of anther was very low in meiosis stage in male sterility line of sweet pepper. There is a POD special band in meiosis and pollen mature stage in male sterility line of pepper respectively.

结果表明不育系与保持系，在花药发育的不同时期POD同工酶表达种类及表达活性之间存在差异，其中甜椒不育系在减数分裂期POD同工酶的活性非常低，辣椒雄性不育系在减数分裂期及花粉成熟期分别多一条POD特征带。

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。