种质遗传

Moreover, because the mulberry is a cross-pollinated plant, it is hard to judge the relations among the species accurately because of the hard up for phylogenetic information in transition types formed in intra-species and inter-species hybridization, therefore, there is no satisfied classification method for Morns L..

因此，利用分子生物学技术研究桑属植物的系统与进化关系，有助于解决我国桑属植物分类中所存在的问题，对于桑树种质资源的分析、鉴定和利用、桑树的遗传育种都具有十分重要的意义。

Research findings proved that southwestern part of China is the original center of tea plant, teemed with germplasm resource of tea plant.

科学研究证明，我国西南部是茶树起源中心，孕育了丰富的茶树种质资源，其遗传多样性为世人瞩目。

300 pieces of idioplasm resources of the Tibetan edible cultivation spring naked barley is identified for characteristic of shape, agronomic characters, rust-resisting property and grain thick protein,β-grape polymerization sugar and Vitamin E and so on from the Tibetan different region, which are analysed result in, for one thing, multiplicity of Tibetan spring naked barley is quite rich for the variation of the awn, leaves and the grain color, and multiple property are highest; Secondly, it has some fine hereditary characters of early maturation, big spike, many grains, many arrises and the strong anti-rust quality; Thirdly, genetic potential which is used possibly is enormous for characteristic of dense spike, exiguous spike, naked grain , the hook awn, short stem, the anti-rust and so on ; Fourthly, thick protein,β-grape polymerization sugar and Vitamin E of grains are rather difference to environmental condition of the various areas.

从西藏各地征集的300余份食用栽培春青稞种质资源，从形态特征、农艺性状、抗锈性和籽粒粗蛋白、β-葡聚糖含量、维生素E等特征特性鉴定、评价。分析结果认为：（1）西藏春青稞多样性极为丰富，如芒、稃和籽粒颜色，具有变异最为丰富，多样性最高的特点；（2）具有早熟、大穗、多粒、棱型多，以及抗锈性强等和耐各种不良环境因素的优良遗传性状；（3）具有密穗、稀穗、裸粒、钩芒、矮生、抗锈等可利用基因潜力巨大等特色；（4）籽粒粗蛋白、β-葡聚糖、维生素E等成份因各地区环境条件不同差异较大。

The results at molecular level provided a feasible research foundation for germ plasma identification, genetic diversity analysis and hybrid parents selection in rice breeding.

这些DNA分子水平的结果可为水稻种质资源的鉴定、遗传多样性分析和水稻育种工作中杂交亲本的选择提供科学依据。

The government has placed much stress on the preservation of the genetic materials from domestic animals and fowls, as well as germ plasma resources from crops.

中国政府重视家畜禽遗传资源和农作物种质资源保护。

Studys on biological characteristics of seeds germination in Primula forbesii ;2. Primula forbesii are Chinese unique germ plasma resources which have beautiful appearance and are promising for application and exploitation.

小报春是我国特有的花卉种质资源，因其独特的景观效果和冬春少花季节开花的优良特性成为近些年来重点研发的野生花卉，研究主要涉及生物学特性和遗传育种领域，围绕其抗旱生理的研究未见报道。

This study analyzed the genetic diversity of green foxtail, yellow foxtailand foxtail millet disturbed in the North of china using twelve allozyme (21 loci),such as AATS ADHS AMPS DIAS GDH.. IDHS MDHS ME~ PGD, PGI5 PGMS SKD. The test of gene flow between cultivated population of foxtail millet and its wild relative, green foxtail, was carried out in the field, using a dominant sethoxydim resistant line as a pollen donor and a population of green foxtail as a recipient.

本研究以我国北方近缘种青狗尾草为材料通过对12种等位酶（AAT、ADH、AMP、DIA、GDH、IDH、MDH、ME、PGD、PGI、PGM、SKD）共21个位点的分析研究它们的遗传多样性；以显性抗除草剂谷子种质作为花粉供体材料，以不抗除草剂青狗尾草作为花粉受体材料进行了栽培种向其主要近缘野生种基因漂移的检测研究。

Because it is not clear for the genetic background of all litchis germplasm resources we have owned.

而荔枝杂交育种一直都没有采用，因为对现有荔枝种质的遗传背景不清楚。

Objective To study the genetic diversity of rDNA ITS sequences in the root tuber of Polygonum multiflorum from various habitats and to analyze the utility of ITS sequences in molecular authenticating the genuineness, identifying the varieties of wild resources, and studying the germplasm resources.

目的 研究不同产地何首乌的ITS片段遗传差异性，分析该片段在何首乌道地性的DNA分子鉴别和野生资源品种的鉴定及种质资源研究中的意义。

Cryopreservation of fish gametes and embryos plays an important role in the preservation of seed resource, cryobiology, genetics breeding and aquaculture.

鱼类配子和胚胎的冷冻保存对鱼类种质资源保护、低温生物学、遗传育种和水产养殖业都具有重要的意义。胚胎的冷冻保存是一项系统工作，一个环节处理不慎，都会导致整个冷冻保存实验的失败。

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％。