查询词典 polyploidy

Autopolyploidy A type of polyploidy involving the multiplication of chromo-some sets from only one species.

同源多倍性：通常是由同一个体，同一纯种的染色体数目加倍而成的多倍性现象。

In addition,gene clusters relevant to diverse forms and other clusters by polyploidy at molecular level have been gradually found.Therefore,chromosomal and molecular characteristics suggest plastic genomes in fishes.

由于基因组的可塑性，鱼类的多倍化和物种间的自然杂交渐渗较易发生，从而对鱼类物种起源、群体间的遗传多样性作出了贡献。

Therefore, the total cell number, floral structure and polyploidy pattern were not significantly affected. Our results indicated that systemic endoreduplication is intrinsically controlled by a differentiation program, and affected by environmental influences such as temperature changes.

结果显示内多倍体细胞的分布情形是分化过程中已经决定的，环境的变化并不会明显影响倍体数细胞分布形式。

Due to the causes such as polyploidy and self-incompatibility,the plants ofPaspalum,with the greatest number of apomictic species,show much complex and various reproduction characteristics.

由于多倍体的存在及有性生殖的自交不亲和等原因，雀稗属植物表现出复杂多样的生殖特性，是禾本科中具备无融合生殖特性种类最多的属。

The paper studies the effect of the quick-freeze and rehydration conditions,regarding polyploidy dandelion as the material,which it can provide reference for the quick freeze and preservation.

以多倍体蒲公英为原料，研究蒲公英的速冻及复水条件，为蒲公英速冻保藏技术提供参考。

Ligusticum 、 Cyclorhiza 、 Tongoloa 、 Carum 、 Oenanthe 、 Pternopetalum and Chamaesium were carried out. Our cytological results suggest that polyploidy did not play an important role in the chromosome evolution of Ligusticum.

报道了伞形科7属16个种的细胞学资料，并通过对藁本属已进行过细胞学研究的种类进行分析，认为多倍化在藁本属类群的演化过程中所起的作用并不明显。

Polyploidy ;; Pleural Effusion ;; Flow Cytometry ;; Cytodiagnosis ;; Ascites ;; Neoplasms ;; Cells

多倍性；；胸腔积液；；流式细胞术；；细胞诊断学；；腹水；；肿瘤；；细胞

In particular, the documentation of rapid and extensive non-Mendelian genetic and epigenetic changes that often accompany nascent polyploidy is revealing: the resulting non-additive and novel gene expression at global, regional and local levels, and timely restoration of meiotic chromosomal behavior towards bivalent pairing and disomic inheritance may ensure rapid establishment and stabilization as well as its long-term evolutionary success.

特别是，所发现的在多倍体形成初期，快速且大量产生的非孟德尔遗传变异和表观遗传变异为相关机理的探讨提供了重要的启示。不同尺度上的基因非加性表达以及染色体二价体联会和二体遗传方式的快速建立可能对新形成多倍体的早期稳定和长期进化优势都具有重要意义。

2N gametes are the result of meiotic mutation during micro- and mega-sporogenesis that bear the sporophytic rather than the gametophytic chromosome number. This paper reviewed the genetic markers including the morphologic, cytological, isozymes and DNA markers, which have been employed in the generation, inheritance, heterozygosity and marker-assisted breeding of 2n gametes based on the frequency of large pollen grains, cytological analyses, unexpected occurrence of polyploidy progeny and the associations between parents and progenies.

文章综述了植物2n配子发生及其遗传标记研究现状，论述涉及有关形态学标记、细胞学标记、同工酶标记乃至DNA标记等遗传标记在2n配子研究中的应用，指出通过花粉形态观察、大小孢子母细胞减数分裂行为观察、杂种后代倍性鉴定以及亲子分子标记相关分析等，对2n配子发生、2n配子遗传类型与杂合性以及2n配子在育种实践中的有效性等进行研究。

Plants can undergo sympatric speciation through polyploidy.

植物可以通过多倍体进行同域性物种形成。

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