性世代

If continuously culture, all can enter the sexual generation and shape sporophytic young seedling.

继续培养均能进入有性世代形成孢子体幼苗，其中在山林腐殖土和壤土按1：1的比例混合的基质上最适于孢子萌发和幼苗生长，出苗量可达3500株／m^2；在杭州采集的紫萁孢子萌发后形成的原叶体、孢子体均比在湖北民族学院采集的耐高温性好。

Meanwhile, our successive observations for 3 generations on several lines of untransformed regenerants indicated that, their fertility under long-day showed a trend to return to normal level of original materials with the advancement of generations. But the transgenic lines still kept more stable and relative higher level over the control under long-day.

然而，通过对部分株系连续三代的初步观察，发现组培再生植株随世代推移长日条件下育性表达水平有逐步回复原始材料水平趋势，而转基因株则可保持稳定的较高长日可育水平。

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。

Bainong 64',a resistant wheat variety to slow powdery mildew,'Jingshuang 16',a susceptible wheat variety to slow powdery mildew were crossed with each other and backcrossed with their F_1,and thus six generations including the parents were obtained.

慢白粉品种'百农64'与感病品种'京双16'杂交，F1自交并分别与两亲本回交，获得包括亲本在内的6个世代，分析了'百农64'慢白粉性的基因数目、遗传力和遗传模型。

With the increasing of directional backcrossing generationstransferred, variation coefficient and uniformity degree of different hybrid groupsdecreasing.

结果表明，随着定向回交世代的增多，杂交种群体内的变异幅度减小，群体整齐性逐渐提高。

As pH value varied in the course of diagenesis,reservoirs experienced one to three cementations or dissolution generations.Lots of secondary dissolution pores developed in the late diagenetic stage,because of the acidic mediums in the process of generation and migration of oil and gas. The anhydrites deposited in the dissolved pores resulted in the heterogeneity of secondary pores.

储层在成岩过程中受地层水pH值变化的影响，经历1~3个世代的胶结或溶蚀作用，其中在晚成岩期油气生成和运移过程中形成的酸性成岩环境对早成岩期生成的碳酸盐岩胶结物和储层中的长石矿物溶蚀，因而产生了大量的次生溶孔，但随后在溶孔中沉淀了不等量的硬石膏，导致了次生孔隙的非均质性。

Breeding of transgenic rice restorer line for multiple resistance against bacterial blight, striped stem borer and herbicide(1) Transgenic rice line Zhongguo91 (carrying cry1Ab and bar gene) and elite restorer line Hui773 were crossed, then backcross was carried out three times using Hui773 as recurrent parent and self-cross was carried out one time.

多抗性(抗白叶枯、螟虫、除草剂)转基因水稻恢复系的培育(1)将恢773与携有转cry1Ab和bar基因的水稻新品系中国91(cry1Ab)杂交，并以恢773作为轮回亲本，连续回交三代和自交一代，对各回交世代的单株进行cry1Ab和bar基因的PCR分析、田间抗虫性鉴定和除草剂Basta抗性鉴定，经过选择获得了转基因水稻恢复系T773-1，田间种植对螟虫及除草剂Basta表现很好的抗性。

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