种质遗传

The role of introgression in shaping the genetic variation pattern of the species should be seen in the same light.

在形成种的遗传变异型中，种质渗入所引起的作用也应当用同样的见地来看待。

Because it is not clear for the genetic background of all litchi's 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。

Molecular systematics on germplasm resources of oak silkworm, Antheraea pernyi, including genetic diversity, cultivar taxonomy and microevolution within species, were investigated using Random Amplified Polymorphic DNA , mtDNA sequence analysis and population genetic analysis.

中文题名柞蚕种质资源的分子系统学研究副题名外文题名 Molecular systematics on germplasm resources of Antheraea pernyi 论文作者刘彦群导师鲁成向仲怀学科专业特种经济动物饲养学研究领域\研究方向蚕的生物技术与遗传育种学位级别博士学位授予单位西南农业大学学位授予日期2003 论文页码总数143页关键词蚕种质资源柞蚕馆藏号BSLW /2003 /S885 /1 柞蚕业是我国的一项传统产业，在现代国民经济中仍然具有资源配置、经济和生态的合理性，有着广阔的发展前景。

Coconut SSR primer pairs were used to amplify 39 different genera of palm family, the effective amplification is 90.5%, and the polymorphism level among the speciese of these genera was relatively high..

供试的42份国内外椰子种质材料的遗传相似系数范围大部分在0.6~0.8之间，最小为0.503，最大为0.961。

Based on the brief introduction of the ohgin,distribution and the collection and conservation of the germplasm resources of apricot,mainly on the variety classification,pollination biology,evaluation of palynology and molecular biology,the genetic and variation characters of hybrid progeny,breeding objectives and technique were reviewed.

文摘：在简要介绍杏的起源、分布及种质资源收集保存的基础上，着重对杏品种资源的分类、授粉生物学、孢粉学及分子生物学评价以及杏杂种后代遗传变异特点、育种目标及育种技术进行了综述，并提出了今后的研究方向。

Based on the brief introduction of the ohgin,distribution and the collection and conservation of the germplasm resources of apricot,mainly on the variety classification,pollination biology,evaluation of palynology and molecular biology,the genet

文摘：在简要介绍杏的起源、分布及种质资源收集保存的基础上，着重对杏品种资源的分类、授粉生物学、孢粉学及分子生物学评价以及杏杂种后代遗传变异特点、育种目标及育种技术进行了综述，并提出了今后的研究方向。

Upon these plants, some germplasm resources were collected at home and abroard, and their morphology, palynology, cytology, growth and development habit, fruit economy characteristics were studied. The extraction methods for DNA of Lonicera Caerulea L. and reaction system of RAPD were also discussed in the project. And it was the first time to study the genetic diversity, relationship and classification of Lonicera Caerulea L on wild resource in Northeast of China and subsection using RAPD.

针对这些问题，我们收集了国内外的种质资源，从形态学、孢粉学、细胞学、生长发育习性和果实经济生物学性状等方面对东北地区野生蓝靛果忍冬的生物学特性进行了系统研究；对蓝靛果忍冬DNA的提取方法和RAPD的反应体系进行了详细探讨，并首次运用RAPD技术分别对东北地区野生资源和蓝果亚组种间的遗传多样性和亲缘关系、分类等问题进行了研究和分析。

The authors proposed that heterochromatin change in genome might play an important role in balancing the germplasms between maize and its distant relatve after cross and parthenocarpy.

这种变异不仅存在于表型不稳定的早代孤雌系中，而且还存在于表型稳定的高代系中，造成这种变异的原因可能是因为远缘种质的引入影响到遗传平衡进而引起染色体发生结构重排并引起染色质的变化，这种变化与玉米染色体组中非同源染色体间存在的同源片段和因此造成的减数分裂过程中非同源染色体配对有着直接的关系。

According to this paper, the use of P〓—IPT gene to improve wheat varieties that had the defect of leaf presenility was feasible. In this way, the potential yield of that wheat could be developed greatly and the new lines for wheat breeding could be produced.

根据本试验的研究结果，表明可以利用P〓-IPT基因对生产上有早衰缺陷的小麦品种进行遗传改良，以最大程度地发挥现存品种的生产潜力及为育种创造新种质。

That is sampling 15 percent of total amount, grouping according the code, simple proportional sampling and clustering sampling with group. A core collection bank of ...

按照最佳建库方案构建起了一个以资源总数3170份的15%，即477份核心样品资源可代表总体资源98%以上的遗传多样性的核心种质库。

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％。