四倍体的

An artificial amphiploid RSP (2n=42, AABBDD) obtained by tetraploid landrace Ailanmai (Triticum turgidum L, 2n=28, AABB) and Aegilops tauschii (DD, 2n=14) expressed high tolerance to sprouting which derived from Aegilops tuuschii.

"RSP"是利用长休眠节节麦与四倍体小麦杂交并通过染色体加倍，人工合成的优良的抗穗发芽小麦新材料。

The meiosis observation demonstrated the genomes of our autotetraploid materials were all 2n = 48, the same as those in mitosis observation.

所有四倍体材料的染色体组成均为2n = 48，这与有丝分裂的结果一致。

It is suggested that autotetraploidy rices are better females in the distant hybridization due to the fact that they are weaker in sexually reproductive ability.

结果暗示由于同源四倍体水稻具有比较弱的有性生殖能力，在远缘杂交中它们是比较好的杂交母本。

Cytogenetical comparison was made between high seed set restorers TP-4 and D minghui63 and eminent maintainer line D46B of autotetraploid rice.

以高结实率的同源四倍体水稻恢复系TP-4和D明恢63及优良保持系D46B为材料进行细胞遗传学研究。

Autotetraploid rice IR36-4X was treated with ion implantation of low energy nitrogen ion beams and a polyembryonic seedling mutant IR36-Shuang was identified in M2 generation.

以低能氮离子束为诱变源，对同源四倍体水稻品系&IR36-4X&进行离子注入，在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双）。

Objective To establish a tissue culture system of Pueraria thomsonii and to cultivate a new breed autotetraploid.

目的建立粉葛的组织培养体系；培育粉葛同源四倍体新种质。

Meanwhile, by either artificial chromosome doubling via colchicine treatment or spontaneous chromosome doubling via a union of unreduced gametes (2n) from T. turgidum-Ae.

同时，通过秋水仙碱对四倍体小麦-节节麦杂种进行染色体人工加倍或利用未减数配子自然加倍，我国科学家创制了一些新的人工合成小麦。

Tetraploid induction from double haploid was also studied, and a desirable result has been obtained. Dripping the apical point of plantlets with 0.2% colchicine plus 1.5% DMSO was a suitable treatment with doubling frequency 18.2%.

其中0.2％秋水仙素+1.5％DMSO滴苗处理，效果较明显，加倍频率达18.2％。1％秋水仙素+羊毛脂膏+1.5％DMSO涂抹生长点试验，加倍率为14.0％，由于此法田间工作量小，不失为双单倍体诱导纯合四倍体较好的方法。

Gigas eggs, if selected for large size, can gie iable tetraploid offspring.

可以产生可存活的四倍体后代。

Effects of different concentrations of exogenous SOD on antioxidant enzyme activities and sugar contents in leaf and fruit were studied, taking tetraploid plant in Vitis vinifera cv 'Muscat humburg' as materials and water treatment as the CK.

以四倍体玫瑰香葡萄为试材，以喷清水为对照，探讨了不同浓度外源SOD对叶片、果实抗氧化酶活性和含糖量的影响。

We are in a real jam.

我们的麻烦大了。

Hey, it's Ahmet from India, that foreign exchange guy.

看，那是印度的阿曼特，国际交换生