染色体

Seedling infection types were detected in eight synthetic hexaploids and theirparents against five stripe rust races and four leaf rust races. The results indicatedtha D and A B genomes of Wheat possessed suPpressors for rust resiStance but morecomrnon on D genomes.

从8个人工合成的六倍体小麦及其亲本材料与5个条锈小种和4个叶锈小种相互作用的苗期侵染型分析表明，小麦D染色体组和A、B染色体组上普遍存在抗锈性抑制因子，以D染色体组上抑制因子的出现频率居高。

Keywords: Carnivores; Chromosome painting; Comparative chromosomal maps; Chromosomal evolution: Karyotypic phylogeny

中文关键词：食肉目；染色体涂色；比较染色体图谱；染色体进化；核型系统发生

Results of study on the behaviour of pine nucleolus during the cell cycle suggested that part of the nucleolar substance, at least, entered the chromosome or attached to the chromosome surface during metaphase and was librated from chromosome to form a new nucleolus during anaphase in higher plants.

对松核仁细胞周期中变化的研究发现，在有丝分裂中期，至少部分核仁成分进入染色体内部或附着在染色体的表面，而在后期从染色体中出来形成新的核仁。

According to An International System for Human Cytogenetic Nomenclature (ISCN 1995), only the case in which two metaphases with the same chromosomal gain or structural rearrangement, or three cells with the same chromosomal loss was defined the presence of an abnormal clone.

根据《人类细胞遗传学命名国际体制(ISCN 1995)》规定：至少2个细胞有同样的染色体增加或结构异常或3个细胞有一致的染色体丢失方称为克隆性染色体异常。

All metaphases showed three distinct green signals, which have the same size and intensity, corresponding to a normal chromosome 8 and two isochromosomes 8q, and five red signals, of which one was located on a normal chromosome 8 and the another two quite symmetrically on the both arms of each isochromosome 8q, respectively.

结果发现：所有中期分裂相均显示3个绿色荧光杂交信号和5个红色荧光杂交信号；2个绿色荧光杂交信号分别位于2条等臂8q染色体着丝粒处，信号大小和强度均与位于正常8号染色体着丝粒处的1个绿色荧光杂交信号相当；1个红色荧光杂交信号位于正常8号染色体长臂上，另外2个红色荧光杂交信号非常对称地位于每一条等臂8q染色体的两条长臂上。

C-banding analysis of satellites in 9 accessions of Ae.tauschii native to China was carried out with C-banded miotic interphases,prophases and metaphases,The results showed that the c-banded heterochromatin of satellites of Ae.tauschii did not change in size during the whole miotic stage and novariaton was observed among plants and cells within a accession,while polymorphism in c-banded satellites between different accessions was found.

5D染色体是节节麦整个染色体组中唯一的1对随体染色体，其随体位于5D短臂的末端。对来源于中国的9个不同的节节麦居群的吉姆萨C带分析表明：同一份节节麦居群内不同植株或不同细胞，这个端部随体在整个有丝分裂前期、中期和间期都很稳定，表现为大小、强弱一致的端部特征带。

The sixth, there were no significantly differences between colchicine groupsand vinblastine groups on the metaphases, in the experiment of prepare mouse4-cell embryo stage single blastomere chromosome specimen by using optimumparameters; and there were significantly differences between colchicine groupsand vinblastine groups on the metaphases (P＜0.05), in the experiment of preparemouse 8-cell embryo stage single blastomere chromosome specimen by usingoptimum parameters.The end, the preparation quality of mouse 4-and 8-cell embryo stage singleblastomere specimen were 2.5, 2.7, 2.4, 1.9, respectively.

低渗液选用0.45％氯化钠时，低渗效果优于选用0.5％柠檬酸钠和0.35％氯化钾的。6、在利用最佳参数制备小鼠4-细胞期胚胎单卵裂球染色体标本时，经统计分析，两种阻断剂的作用效果差异不显著；而在制备小鼠8-细胞期胚胎单卵裂球染色体时阻断剂选用长春花碱的效果优于秋水仙素的(P＜0.05)。7、秋水仙素组和长春花碱组小鼠4、8-细胞胚胎单卵裂球染色体标本制备质量分别为：2.5、2.7、2.4、1.9。

The sterile pollens were very concerned with non-equality of homologouschromosomes at two polars,and the difference of pollen yields among individuals werelikely related with disintegration of Tapetum in Prophase I.

其中败育花粉的产生与同源染色体的不均衡分配关系最为密切，而花粉产量的差异则可能是在减数分裂前期I时即发生绒毡层解体而造成的，其根源仍在于毛白杨染色体的异源性，此外易位、倒位等染色体结构变异和天然三倍体的存在也常常会加剧人们对毛白杨配子败育严重的印象。

Based on the data besides chromosomal relative length and arm ratio, the quantitative chromosome map was constructed.

而在多年生类玉米的两对同源染色体短臂上的近末端区域都检测到455 rDNA的杂交信号，而且在一对染色体上的信号点总是比另一对染色体上的大。

Of the chromosomes with arm ratio over 2, and the ratio of the longest chromosome to the shortest one is 2.24:1, thus it belongs to 2B type, and the karyotype formula is 2n =2x =18 =8m (2SAT)+10m.

臂比大于2的染色体占22.2％，最长染色体与最短染色体的比值为2.24，核型类型为2B型，核型公式为2n=2x=18=8sm(2SAT)+10m。

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