四倍的

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。

Embryo development and origin of twin-embryo of autotetraploid rice with twin-embryo seedlings were observed and verified.

利用激光扫描共聚焦显微技术对同源四倍体双胚苗水稻的受精过程、胚胎发育过程和双胚来源进行观察鉴定。

To cut a long story short Bloom, grasping the situation, was the first to rise from his seat so as not to outstay their welcome having first and foremost, being as good as his word that he would foot the bill for the occasion, taken the wise precaution to unobtrusively motion to mine host as a parting shot a scarcely perceptible sign when the others were not looking to the effect that the amount due was forthcoming, making a grand total of fourpence (the amount he deposited unobtrusively in four coppers, literally the last of the Mohicans), he having previously spotted on the printed pricelist for all who ran to read opposite him in unmistakable figures, coffee 2d, confectionery do, and honestly well worth twice the money once in a way, as Wetherup used to remark.

272长话短说。布卢姆看明事态之后，生怕呆得太长，招人讨厌，就头一个站了起来。他信守了自己要为这次聚会掏腰包的诺言，趁没人注意就机警地朝我们这位老板作了个几乎觉察不到的告别手势，示意马上就付钞，总计四便士（并且不引人注目地付了四枚铜币，那诚然是"最后的莫希干人"了）。他事先瞧见了对面墙上的价目表上印得清清楚楚的数字，让人一看就读得出来：咖啡二便士，点心同上。正如韦瑟厄普过去常说的，货真价实，供应的东西有时竟值两倍的价钱哩。

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。

Another, 2002 study of 499 adults found a four-fold increased risk of obesity for those who reported skipping breakfast 25% of the time.

另外2002年一项对499名成人的研究发现，那些自称四分之一时间不吃早饭的人，患肥胖症的危险增加四倍。

There are many different races and ecotypes throughout its range, the more widespread being generally tetraploid with local diploid races particularly in the Mediterranean region.

在整个它的分布区有很多不同的比赛和生态型，更多的广布的特别是在地中海地区一般作为四倍体具本地二倍体比赛。

If, however, the root cell is one of the rare tetraploid cells (a cell having four sets of chromosomes that arise spontaneously in the root), it may develop into a nodule.

如果这个根细胞是罕见的四倍体细胞（一种在根部自然拥有四套染色体的细胞），它就可能生长成为根瘤。

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。