查询词典 diploid

The cytogenetics of interspecific hybrids among the four cultivated cotton species were studied in this paper and results are as follows: The diploid interspecific hybrid (G. arboreum×G. herbacium) F〓 had a four-chromosome-ring at the meiotic metakinesis. The synapses of tetraploid hybrid (G. hirsutum ×G. barbadense) F〓 was found to be regular, which mainly formed bivalents, sometimes some univalents, multivalents and chromosome bridge.

四个栽培棉种间杂交种F〓的细胞学观察结果表明，F〓减数分裂中期Ⅰ，形成一个环状四价体，直接证明了亚洲棉与草棉之间存在一对相互易位；F〓减数分裂中期Ⅰ联会基本正常，主要形成二价体，偶尔出现一些单价体和多价体，以及染色体桥。

The haploid plant produces gametes mitotically and is thus termed the gametophytes while the diploid plant produces spores meiotically and is called the sporophyte.

单倍体植物有丝分裂产生配子体，二倍体减数分裂产生孢子体。

Seven green transgenic plants, including one mixoploid, two haploid, and four diploid plants, were regenerated.

共获得7个转基因株系，其中2个单倍体，4个二倍体，1个混倍体。

Four external controls were also tested by using nullisomic,monosomic,diploid,a...

在测试标本中，一个片段的拷贝数根据比较对照与标本的荧光强度而获得。

The morphological observation showed that the two monosomic addition lines could form head normally, but the characters existed difference between the addition- lines and diploid parent.

对2个单体异附加系的植株形态学性状进行了初步观察，结果显示2个附加系均能正常结球，但球形的形态与二倍体结球甘蓝存在明显差异。

The improved L.D.Cua method was used to induce tetraploid of Trichosanthes kirilowii Maxim. The suitable treating time of 0.2% colchicine, the morphology characters and cytology identification between plants of diploid and obtained tetraploid were studied.

采用改良L.D.Cua法诱导短把栝楼获得四倍体，研究了0.2%浓度的秋水仙碱诱导短把栝楼染色体倍性变异的最佳处理时间、四倍体栝楼与原栝楼的形态特征及其四倍体与二倍体的细胞学鉴定。

The DNA relative content of large unreduced pollen grains induced by colchicine was determined quantitatively with laser scanning confocal microscopy using the normal-sized pollen grains as control. The results suggest that the large unreduced pollen grains are diploid.

以正常花粉作对照，用激光扫描共聚焦显微镜对经秋水仙碱处理诱导出的大花粉进行了DNA含量的定量测定，初步确认该试验诱导的大花粉是一种二倍体花粉。

The genetic analysis and improvement of characters, such as tuber processing quality traits and yield components which tend to be quantitatively inherited, are far more difficult than those at diploid potato. Reviewing the earlier studies indicated that a few systematic investigations on genetics of important traits in potato were untaken and most focused on estimates of combing ability for agronomic traits due to limited materials and methodologies available.

利用二倍体材料简化了遗传分离比例、可应用现有的二倍体遗传模型进行遗传分析并更有效的挖掘和利用二倍体资源中的优异基因，进而通过倍性育种及遗传工程育种将有利性状转育到四倍体普通栽培品种。

A total of 442 BC〓F〓 and 9 BC〓F〓 plants were obtained by backcrossing F〓 and BC〓F〓 to 02428, the chromosome number of 42 BC〓F〓 and all BC〓F〓 plants so far examined varied from 24 to 38, from which 21 plants with 2n=25 and 21 diploid plants were isolated.

进一步用02428对F2和BC1 F1回交共获得442株BC1F2和9株BC2F1，已确定其中42株BC1F1及所有BC2F1植株的体细胞染色体数目，其变幅为24-38，2n=25及2n=24的植株各有21个。

Comparing with diploid, the growing rate of tetraploid plants was slow and leaves became bigger, thicker, dark green and crimpled. The stomata density of tetraploid plants was reduced, but the guard cell of stomata became bigger and the chloroplast number in guard cells was increased.

与二倍体相比，四倍体表现为：生长变缓；叶片增大、皱缩和变厚、叶形指数减小；叶片保卫细胞增大，气孔密度降低，叶绿体数目增加，叶色加深。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐