基因世代

The variance component of cross and backcross generations of quantitative character controlled by multigenes is studied on condition of chromosome translocation .

研究了染色体易位情况下，多基因控制的数量性状杂交及回交世代的方差组成。

Gene expression of two Chinese cabbage backcross hybrid BC1, BC2 and their parents at bud stage was analyzed by means of cDNA-AFLP technique.

利用cDNA-AFLP技术对两种材料的不同回交世代BC1、BC2代与其亲本在蕾期的基因表达进行分析。

It implied that the Fi single plant of stable strains had been homozygosis genetype plant, and the basic genetic unit of early generation stability was F single plant or F2 strains.

由此说明稳定株系的F_1单株已经是纯合基因型植株，水稻中出现的早世代稳定遗传的基本单位是F_1单株或F_2株系。

Compared to japonica type parent, indica type parent (Taichung-Sen 10) contributed more genetic materials in the chromosomes 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, and 12, to the RIL population, but less in the chromosome 7. The averaged homozygosity (94.6％) was deviated from the expected ratio 96.9％.

十二对染色体之平均同结合与异结合比例分别为94.6％及5.4％，偏离F6世代同结合基因型之比例理论值(96.9％)，而分别在第六对染色体上有最大之同结合比例(98％)，第二对染色体有最小之同结合比例(90％)。

A rare exception is the KE family, a large three-generation pedigree in which approximately half of the members are affected with a severe speech and language disorder which appears to be transmitted as an autosomal dominant monogenic trait.

一个罕见的例外是KE家族，一个庞大的三个世代的谱系，其中将近半数的成员受到严重的言说和语言失调的影响，显示受到以此种遗传作为常染色体显性单的基因起源特徵。

In a large population, the probability of sampling error is small and little change to the allele frequencies is expected, even over many generations.

在一个大群体中，抽样误差的概率小，甚至经过许多世代等位基因频率的变化都很小。

The expression patterns of cry1Ab gene and its resistance to striped stem borer in the different generations of progenies of "Kemingdao" were studied under field conditions.

以不同世代的"克螟稻"为试验材料，在田间自然条件下研究了cry1Ab基因在"克螟稻"后代中的表达特性及其对二化螟的抗性。

He resistance pattern of a F_2 population derived from cross of HN19 andHN16 was analyed thrugh inoculation with Cladosporium fulvum.

本研究选取含番茄抗病基因Cf-19的HN19和对番茄叶霉病感病的HN16为感病亲本材料，及其有性杂交的F_2分离世代的种子为试验材料。

At last, error variance estimated from P〓, P〓 and/or F〓 or the replicated family experiment was used to confirm the existence of polygenes.

从例证来看，利用个别世代的分离分析在亲本和/或F〓参加时有利于提高主基因加性与显性效应的估计精度和揭示出更多的信息。

In especial whether or not this advantage will keep on in the course of execution of multigeneration selection scenario.

在基因型选择具有优势的世代范围之内，所获得的额外遗传进展至少可达 10％。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐