四倍体的

That indicated the availability of SRAP technique in studying genetic variability in Arachis. Estimates of genetic distance among the 28 accessions Arachis section ranged from 0.12 to 0.75 with average genetic distance of 0.42. A genetic distance clarified that A-genome A. duranensis was most closely associated with tetraploid germplasm, which could be A-genome donors. Dendrogram of cluster analysis classified 28 accessions Arachis section into two groups: one including tetraploid germplasm, and A.

聚类分析表明，28份花生材料间的遗传距离变幅为0.12~0.75，平均为0.42，A基因组物种Arachis duranensis与栽培种花生的亲缘关系最近，可能是栽培种花生的A基因组的供体。28份种质分为两大类，第一大类包含四倍体种质及A基因组的A。

So, the abnormality of embryo sac was one of the factors that induce low seed setting percentage in autotetraploid rice.

从对13个品种的成熟胚囊育性调查的结果来看，同源四倍体水稻胚囊育性是影响其结实率的原因之一。

Such a gamete may be produced by tetraploid tissues, or it may be the result of faulty meiosis.

这样的配子可能是通过四倍体组织或者是错误的减数分裂产生的。

At the lower generation (C5) of the autotetraploid eggplant, plant shape index and the ratio of the well-balanced plants (9.19%) are low. The average shape index for 12 strains of the three different female parents is 0.4779. But its genetic rate is: h^2=96.39%±3.52%. Plant shape index shows strong minus correlation with average fruiting ability, it's relique interrelated coefficient is: r=-0.9989 and correlative heritability is: h=-95.22%.

同源四倍体茄子育种选择的较底世代（C5代）株形和结果正常的植株比例很低(9.19%)，3个不同母本系的12个株系株形指数平均为0.4779，株形指数的广义遗传率h^2=96.39%±3.52%，株形指数与植株平均结果数呈极强的负相关性，遗传相关系数r=-0.9989，相关遗传力h=-95.22%。

Homozygous tetraploid is a relatively balanced system,the continued selection is invalid.

纯合的四倍体是一个相对平衡的系统，继续选择是无效的。

Toxicity of chemicals and break or deficiency ofchromosomes could be the important cause of high deathrate in the tetraploidy embryos of abalone.

化学药物的毒性作用和染色体的断裂或缺失，可能是导致皱纹盘鲍四倍体胚胎死亡率高的重要原因。

The investigation results show that the shrubs diameter apart from root 50 mm mostly shall not exceed 15mm, such as Caragana Korshinskii Kom, Vitex, Fourfold Acacia, and Grewia biloba var.parviflora. The moisture content of the above shrubs is about 55%, 55%, 61% and 50% separately in late autumn and winter when they are reaped.

通过实地调查研究和统计分析适值收割的柠条等几种常见灌木的距地50 mm左右处的直径一般不超过15 mm，适宜收割期间柠条含水率为55%左右，荆条含水率为55%左右，四倍体刺槐含水率为61%左右，扁担木含水率为50%左右。

According to the order, the data of Caragana Korshinskii Kom is about 6.07 J/cm~2, 23.67 MPa, and 1787.98 MPa separately, and the data of Vitex is about 11.78 J/cm~2, 48.06 MPa and 3544.36 MPa separately. Additionally, the data of Fourfold Acacia is about 10.09 J/cm~2, 40.78 MPa and 2304.87 MPa , whereas the data of Grewia biloba var.parviflora is about 8.47 J/cm~2, 65.88MPa and 2523.88MPa respectively. The impact toughness four shrubs is in the bound of the data of wood in China, but the compressive strength and compression elastic modulus parallel to grain are some small than those of ordinary wood.

柠条的冲击强度为6.07J/cm~2，顺纹抗压强度为23.67MPa，顺纹抗压弹性模量(来源：AB75C论文网www.abclunwen.com)为1787.98MPa；荆条的冲击强度为11.78J/cm~2，顺纹抗压强度为48.06 MPa，顺纹抗压弹性模量为3544.36MPa；四倍体刺槐冲击强度为10.09 J/cm~2，顺纹抗压强度为40.78 MPa，顺纹抗压弹性模量为2304.87 MPa；扁担木的冲击强度为8.47J/cm~2，顺纹抗压强度为65.88MPa，顺纹抗压弹性模量为2523.88 MPa。

Chromosome observation of the male sterile line and fertile line, parents of hybrid combination and F1 indicated that the chromosome number of the male sterile line is the same as that of fertile line 2n=2x=24; Pollen parent (Tagetes putula PHBO029) is tetraploid 2n=4x=48; the F1 is triploid 2n=3x=36 with hybrid vigor.

通过对不育系、正常可育系以及杂交组合父母本、子一代的染色体数目观察发现：万寿菊雄性不育系的染色体数目与正常可育系相同，均为2n=2x=24；孔雀草PHBO029为四倍体2n=4x=48，它与万寿菊不育系杂交、其杂种为具有杂种优势的三倍体2n=3x=36。

Smearing apical point with a mixture of 0.2% colchicine plus adeps lanae and 1.5% DMSO was also effective with doubling frequency 14.0%. Dripping the apical point of plantlets with trifluralin has also been tested, and it showed effective in inducing tretraploid from double haploid, but obviously delayed plant growth.

本试验还用具有抗微管形成的除草剂氟乐灵进行黄瓜幼苗滴苗加倍试验，试验结果表明，在进行黄瓜双单倍体诱导纯合四倍体时，氟乐灵具有使染色体加倍的功能，但同时也具有延迟处理植株生长的作用。

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