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染色体结合

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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%)。

Of or relating to a chromosome that is not paired or united with its homologous chromosome during synapsis.

单价染色体的属于或有关一种染色体的,在染色体结合过程中不与它的对等染色体配对或结合

Genetics used of a chromosome that is not paired or united with its homologous chromosome during synapsis.

属于一种染色体的,在染色体结合过程中不与它的对等染色体配对或结合的。

The first stage of meiosis, constituted by a series of events that include DNA replication, the synapsis of homologous chromosomes, crossing over, the formation of chiasmata, and contraction of the chromosomes.

前期阶减数分裂的第一个阶段,由一系列的事件组成,包括脱氧核糖核酸的复制,同种染色体结合、交叉,染色体形成以及染色体的收缩一套,一系列

The first stage of meiosis ,constituted by a series of events that include DNA replication,the synapsis of homologous chromosomes,crossing over,the formation of chiasmata,and contraction of the chromosomes.

前期阶减数分裂的第一个阶段,由一系列的事件组成,包括脱氧核糖核酸的复制,同种染色体结合、交叉,染色体形成以及染色体的收缩

DNA'.'' replication, the synapsis of homologous chromosomes, crossing over, the formation of chiasmata, and contraction of the chromosomes.

复制'。'',同种染色体结合、交叉,染色体形成以及染色体的收缩

Software and results were saved in EXCEL for consequent statistic operation and obtaining chromosome patterns. 4 indexes were chose, such as chromosome karyotype, C-band pattern, chromosome behavior and B chromosome for comparative analyses, and adopted SPSS to reconstruct dendrogram. Combined with studies on insect morphology and insect geography, we made a detailed analysis and speculation on the relationship of taxa concerned. Finally we got the conclusions as follows: 1. The number of chromosomes in grasshoppers of Oedipodiae is 2n 〓=23=22+XO. All chromosomes are telocentric chromosomes. Most of the genome formulas are 3L+6M+2S+X and 3

论文选取染色体核型、C-带带型、染色体行为和B染色体这4个方面的指标进行比较分析,运用SPSS系统分析软件建立表达各属和各种之间亲缘关系的系统树,并结合昆虫形态学和昆虫地理学等方面的研究成果,对其亲缘关系进行了比较详细的分析和推测,得出以下结论:一、斑翅蝗科蝗虫的染色体数目都稳定在2n〓=23条,性别决定机制是XO型,染色体均为端部着丝粒,染色体组式以3L+6M+2S+X和3L+7M+1S+X这两种类型为主,即3对大型染色体,6~7对中型染色体和2~3对小型染色体,X染色体以中型为主,在染色体组中主要排列为4~7位。

The results showed that karyotypic type of Ya01-21was 2n=104=100m+4sm(4SAT), Chromosome length ratio of the longest and the shortest 4.25, the average arm-ratio 1.35, belonging to 2C type of chromosome. Molecule identified combine with chromosome studied indicated that Ya01-21 was a progenies of Erianthus arundinaceum. following the law of n+n; ITS identify showed that Ya01-21 is a progenies of Erianthus arundinaceum, the somatic chromosome karyotypic type of Ya01-36 was 2n=132=130m+2sm, Chromosome length ratio of the longest and the shortest 3.94, the average arm-ratio 1.27, belonging to 2B type of chromosome, combining the advance of characters the law of 2n+n can be resumed.

研究结果表明,崖城01-21的体细胞染色体核型公式为2n=104=100m+4sm(4SAT),最长与最短染色体的长度比为4.25,平均臂比1.35,染色体属2C型,分子鉴定结合细胞学研究认为其为斑茅的真实后代,其染色体遗传为n+n;崖城01-36经ITS签定为真实杂种,其体细胞染色体核型公式为2n=132=130m+2sm,最长与最短染色体的长度比为3.94,平均臂比1.27,染色体属2B型,结合其性状的进展,推断亲本向其传递染色体可能以2n+n的方式进行。

When applied the spiny eel X chromosome library probes to the chromosomes of the two fish, different signals were distributed: in Siniperca chuatsi, besides some little signals on lot of autosomes, a large bright signal region was detected on the 8th chromosomes, which represented a synteny of spiny eel X chromosomes; but in Channa argus, no distinct synteny was found.

当以刺鳅的生物素标记X文库探针对鳜鱼和乌鳢的有丝分裂染色体进行染色体涂绘后,经过核型分析和统计分析表明,在这两种鱼的染色体上的杂交信号分布是不同的:在乌鳢中,除散在信号外,在其第八号染色体近着丝粒部位存在着一段较大的信号结合区域,应是与刺鳅的X染色体同源的保守同线群,而在鳜鱼中,只有散在信号分布于多条染色体上,没有明显的保守同线群存在。

Association of two homologous chromosomes are linked closely together, only in local positions can sometimes distinguish between a two chromosomes.

联会的两条同源染色体结合紧密,只在局部位置上有时可分辨出是两条染色体。

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