种质

New apomictic plants are enumerated. Genetic mechanism is summarized. The problems in this field and development prospects are discussed.

本文对近几年来无融合生殖新种质资源的发现、主要研究方法、遗传机制和相关基因等方面的最新进展作了介绍，并对无融合生殖研究中存在的问题和发展前景作了讨论。

Based on thecluster analysis and PCA,the 23 germplasm materials investigated may be divided intotwo groups,most of genetic variation was within group.There was a certain relationshipbetween genetic distance and geographic distance among Arrhenatherum elatius L. in theresearch.

基于ISSR标记的UPGMA聚类分析与主成分分析表明，23份高燕麦草种质材料能按照采集地点的不同分为两大组，组间遗传距离的差异是导致供试材料整体遗传差异较大的主要因素，而组内材料间亲缘关系较近，地理距离与高燕麦草的遗传距离有一定关系。

This indicated that entropy weight-based gray systematic theory can be used in integrated evaluation of oat (Avena sativa L.) germplasm.

聚类分析也得到相同结果，说明基于熵权赋权法的灰色系统理论可以用于燕麦种质资源的综合评价。

The drought tolerance of wild Axonopus compressus germplasm resources was studied and the drought resistance of each A. compressus plant was found to have a direct relationship with its habitat. The A. compressus plants which had better drought tolerance were usually distributed on sloping ground, waysides etc., while plants which had poor drought tolerance were usually distributed in damp habitats such as river banks and bottoms.

对我国不同来源地毯草野生种质资源抗旱性的研究结果表明，各供试地毯草的抗旱性与生境有着直接的关系，基本表现为分布于山坡地和路边等旱生环境中的地毯草，其抗旱性也相对较好，而那些在综合评判中表现为抗旱性较差的地毯草，大多是从河滩等湿生环境中采集到的材料。

The GR38,a japonica-prone rice with wide spectrum and strong restoring,was developed from the cross of Guangzhongai,a wide compatibility China indica rice,and Balilla,a Italian japonica rice without restoring ability.

用无育性恢复力的意大利粳稻巴利拉，与具有广亲和性的我国改良籼稻广中接杂交，创新出偏粳型广谱性强恢复系种质GR38。

Regeneration and reproduction by establishing tissue culture system of Betula halophila may be a promising way.

植物组织培养技术发展异常迅猛，本研究旨在建立濒危植物盐桦的组织培养再生系统，并对该盐桦组织培养再生系统进行了优化筛选，该研究为盐桦的种质资源保存和无性繁殖开辟了一条行之有效的途径。

From above, fine genetic resources of asexual reproduction had been found from commercial and bivoltine genetic races.

因此，在我国二化性蚕品种中可获得雌蚕无性繁殖系培育所需的优良种质资源。

Research on the genetic relationships of Boehmeria can provide scientific basis for exploring the origin, evolution,classification and ramie breeding.

苎麻属植物亲缘关系的研究将为探讨苎麻起源、进化与分类以及苎麻种质资源的研究与育种利用提供科学依据。

In this article,progress in studies and utilization of special watermelon germplasm resources for branchless,dwraf,nonlobed-leaves,male-Sterility and delayed green leaf is introduced in China.

本文介绍了国内对无杈、短蔓、板叶、雄性不育和叶片后绿特异西瓜种质资源的研究利用进展。

The set of SSR loci would potentially be useful molecular markers for the germplasm identification, genetic diversity analysis, and gene mapping of Bupleurum.

从文库资料中挖掘的具有潜在标记价值的SSR位点将为柴胡种质鉴定，遗传多样性分析及基因定位提供有效分子标记。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。