查询词典 polyploid

If such gametophytes produce fertile gametes, the resulting sporophyte is then tetraploid, and large polyploid series may subsequently be developed.

如果这种配子体能够产生可育的配子，那么形成的孢子体通常是四倍体，这样就可以得到大量的多倍体。

The chances of a daughter cell lacking essential genes are less than may be expected since many cells that characteristically divide amitotically are polyploid, e.g.

无丝分裂曾一度被认为是植物体在不正常状态下的一种分裂方式，但研究发现，无丝分裂还是较普遍存在的。

The apical bud of Celosia cristata was immersed in 0.05%, 0.1%, 0.15% and 0.2% colchicine solutions for 12 h, 24 h, 36 h, 48 h respectively and the chromosome numbers of the root tip cells in the regenerated plantlets were examined, which showed that the treatment with 0.15% colchicine solution for 36 h would be the best combination that the polyploid rate could reached 23.3%.

采用浸泡法将鸡冠花营养芽在0.05%、0.1%、0.15%和0.2%不同秋水仙溶液浓度下分别处理12h、24h、36h和48h，并对诱导处理后获得的再生植株进行鉴定，得出以0.15%秋水仙素溶液浸泡36h为诱导多倍体的最佳处理组合，诱导率达23.3%。

In this study, heat shock was tested for polyploid induction through meiosis or mitosis inhibition in the dwarf surfclam, Mulinia lateralis Say.

本试验研究了热激抑制减数分裂和有丝分裂来诱导侏儒蛤多倍体。

The results showed that pendimethalin is a herbicide interfering cell division,The mito-sis of pendimethalin treated root was arrested at metaphase with contracted and condensed chromo-somes and produced a series of abnormal,polymorphic cells such as multinucleate,multinucleolus,micronucleus and polyploid cells.

结果表明，除草通是一种影响细胞有丝分裂的除草剂，其作用方式在于阻止分生组织细胞从前期向中、后、末期的过渡，引起染色体凝集、短缩以及多核、多核仁等一系列畸形与异常变化。

For example, the polyploid rice-grass Spartina townsendii is better adapted than either of its parent species to their own habitat of saline marsh and mud-flats.

例如，多倍体唐氏米草比其父本、母本更能适应父母本自己的盐碱沼泽和淤泥滩栖息地。

Experiment Ⅴ: Mouse polyploid embryos were produced by electrofusing 2-cell blastomeres successionally.

实验六、通过2-细胞卵裂球交换制作2n／4n嵌合小鼠胚胎，对这种胚胎的发育能力进行了评价。

The paper summarized the principle of multiploid and the advantages of multiploid of medical plants application,summed up the common methods in artificial induction multiploid of medical plants and identification of chromosome doublings,brought forward a few key problems which should be paid attention in polyploid breeding of medical plants and its research prospect.

概述了多倍体的原理及药用植物多倍体的应用优势；总结了人工诱导染色体加倍的常用方法和染色体加倍的鉴定方法；并提出了药用植物多倍体在该领域中存在的问题及研究前景。

Xaploids found in Sichuam on genetics and polyploid breeding in mulberries .

在四川发现大量的六倍体，这时桑树的遗传学研究和多倍体育种都具有重要的意义。

Polytene chromosome structure is a characteristic of some polyploid cells where several to thousands of chromatids are closely associated with perfect alignment of homologous DNA sequences.

多染色体结构是多倍体细胞的特征。在多倍体细胞中，有几个至几千个染色单体与相对应的DNA序列精确结合。

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