四倍的

So, if a mouse is born from a stem cell injected into a tetraploid blastocyst, that stem cell must have been totipotent.

所以如果一只老鼠诞生自注射过干细胞的四倍体晶泡，那么干细胞就是全能的。

Transgenic triploid fish can be produced in large scale by crossing transgenic allotetraploid fish with transgenic diploid fish.

湖南师范大学生命科学学院成功的研制了雌雄可育的异源四倍体鲫鲤，并已成为一个种群。

By using genome in situ hybridization on root somatic chromosomes of allotetraploid derived from the cross Gossypium arboreum × G.

然而，仅依据形态学和普通的核型图像，还不能确定该异源四倍体棉种中比克氏棉G染色体组在核型中的表现。

Long treatments(7–43 min — about three quarters of the period of meiosis I in triploid eggs). yielded only heptaploid cells among the embryos.

在抑制三倍体受精卵第一极体（PB1）过程中，处理时间的不同对后代四倍体的得率有明显影响。

Short treatments (15–35 min after fertilization — about half the period of meiosis 1 in triploid eggs).yielded tetraploid and heptaploid cells.

因此，本试验试图利用Guo和Allen的方法对四倍体诱导中的一些基本条件进行优化。

The results showed that autote traploid rice might be effectively improved by ion beam bio-technique, from which the new germplasm with hereditable twin-embryo seedling could be selected.

结果表明，利用离子注入技术可以对同源四倍体水稻进行有效地改良，由此可以获得具有遗传变异特点的新种质，其双胚苗特性随着自交世代的推进而得到保持。

The results indicated that the highest tetraploid induction rate could reach 23.4% when the leaves precultured on the optimal organogenetic MS medium for 12d and treated with 10 mg/L colchione on the double layer media for 24h in vitro.

结果表明，预培养12d的兰考泡桐叶片在秋水仙素浓度为10mg/L的双层培养基上预培养处理24h时，四倍体诱导率最高达到23.4%。

In the present study, the autotetraploid rice IR36-4X was treated with ion implantation technique by nitrogen ion beams and a polyembryonic seedling mutant (named as the IR36-Shuang) was identified in M2 generation. The mutant line was systematically investigated about the location of seedling in polyembryonic seedling, and the cytological initiation of the additional embryo in the 1R36-Shuang was observed and determined.

以低能氮离子束为诱变源，通过对同源四倍体水稻品系&IR36-4X&进行离子注入后在其第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），对该突变株后代的多胚苗形态特征及其多胚来源进行了研究。

For example,α2-macroglobulin appears to have an alternative structure that consists of a tetrameric subunit linked via disulfide bridges.

例如，第二号甲型巨型球蛋白似乎拥有一个由双硫键所连结的四倍体次单元所组成的结构。

He rejected the medieval fourfold interpretation which allowed allegorizing, spiritualizing, and moralizing, insisting that the literal meaning of the words was to be taken in their historical context.

他拒绝让寓言诠释中世纪四倍，spiritualizing、道德、坚持词的字面意思是要上当的历史背景。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。