四倍体的

Study on reproductive characters of autotetraploid rice.

同源四倍体水稻的生殖特性研究。

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。

The low seed setting percentage is the most important reason that limits the application of the autotetraploid rice.

同源四倍体水稻结实率偏低是影响其在育种中直接应用的重要原因。

The autotetraploid gives a chance to improve the content of medical materials in the root of P. thomsonii.

同源四倍体粉葛为葛根中药用物质质量分数的提高提供了基础。

To establish a new technique for in vitro rapid propagation and conservation of germplasm of autotetraploid plant of Plalycodon grandiflorum, basal MS medium supplemented with different hormones was filtrated and optimized by using uniform design and orthogonal design.

为了建立优良同源四倍体桔梗的快速繁殖和离体保存技术，采用均匀设计和正交设计以添加不同激素的MS培养基为基本培养基进行筛选和优化。

The most disturbing of the Geomancer's power, however, is his ability to separate his being into multiple selves, each as powerful as the original and making him potentially four times the trouble for the unlucky who encounter him.

然而土占师最扰人的能力是他能将自身的存在分离产生多个另体，每个另体的能力都与本体不相上下，让他成为惹上他的倒楣鬼的四倍大的大麻烦。

The results are summarized as follows: tin the polygonum embryo sac of tetraploid grape , megaspore telrad arranged in straight line.

结果如下：在四倍体葡萄的蓼型胚囊中，四分体孢子呈直线排列，合点端的大孢子发育胚囊。

Variation of tetraploidy was observed among the regenerants from culture of immature cotyledons,cotyledons and leaves of melon seedlings.

甜瓜未成熟子叶、幼苗子叶和真叶离体培养的再生植株中存在着明显的四倍体变异，比率分别为30%、16.2%和 42.9%。

The phylogenetic analysis based on the sequences in this region indicated that the y-type HMW glutenin subunits of Agropyron elongatum species were different from other subunits, whereas the x-type subunits of them were most closely related to that from the B genome.

推测四倍体长穗偃麦草中的E1基因组可能起源于二倍体的E基因组。与来自小麦族的A、B、D和G基因组部分亚基基因的启动子序列比较表明，小麦族的这一区域在进化上是相当保守的，不同基因组来源的序列同源性都在90%以上。

Methods Using the MS medium as the basic medium, the explants shoot apexes and stem segments were cultured to differentiate the regenerations. The autotetraloid with genetic material doubled was achieved by treating shoot tips with colchicine of different concentrations for different long times.

方法以 MS培养基为基本培养基，培养外植体茎尖或茎段获得组培再生植株；用不同体积分数的秋水仙素对无菌苗茎尖进行不同时间的处理，诱导遗传物质加倍的同源四倍体。

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