四倍

The changes of endogenous hormones in adventitious root formation in softwood cuttings of autotetraploid grape Muscat Hamburg were studied.

以葡萄同源四倍体玫瑰香和其二倍体玫瑰香母株的嫩枝插条为试材，研究了扦插生根过程中(0～18d)生根部位皮层的内源激素含量变化。

The autotetraploid plants were obtained by identifying the characteristics of morphology, cytology, agronomy,and nutrition quality.

采用不同质量浓度的秋水仙素处理子叶期二倍体萝卜茎尖生长点，通过对突变株进行形态学、细胞学、农艺学及营养品质鉴定，获得同源四倍体。

The formation and development of embryo sac in the diploid and its autotetraploid of rice cultivar IR36 was examined using Laser Scanning Confocal Microscopy.

利用激光扫描共聚焦显微镜术对水稻品种IR36二倍体及其同源四倍体的胚囊形成和发育过程进行了系统的研究。

In crossing of the 8 autotetraploidy rices (Oryza sativa, 2n=4x=48), APIV(4), IR36(4), Zixuedao(4), Ce 64(4), Minghui 63(4), IR28(4), Ce 90(4) and Gui 99(4) used as the females, with Pennisetum alopecuroides (2n=2x=18) used as the males, the seeds were obtained, but no seed was got in the crosses of the 3 diploidy rices (Oryza sativa, 2n=2x=24), APIV(2), Ce 90(2) and Zixuedao(2) used as the females, with Pennisetum alopecuroides.

利用APIV(4)、IR36(4)、紫血稻(4)、测64(4)、明恢63(4)、IR28(4)、测90(4)和桂99(4)等8个同源四倍体水稻(Oryza sativa， 2n=4x=48)为杂交母本，以狼尾草(Pennisetum alopecuroides， 2n=2x=18)为杂交父本进行杂交，获得了实粒种子。但是，在以APIV(2)、测90(2)和紫血稻(2)这3个二倍体水稻(Oryza sativa， 2n=2x=24)为杂交母本，以狼尾草为杂交父本的杂交组合中却没有获得实粒种子。

Five concentrations of colchicines were used to treat aerial bulbil in garlic inflorescence for polyploid induction in vitro.

用5种不同浓度的秋水仙素处理大蒜花苞气生鳞茎进行多倍体诱导，发现在固体培养基上接种处理时毒害作用较小，四倍体的诱导率最高能达到66。

It is found that the hazard of colchicines to aerial bulbil is much less in solid media than in liquid media,and the highest induction rate of tetraploid garlic is 66.7% in solid medium.

用5种不同浓度的秋水仙素处理大蒜花苞气生鳞茎进行多倍体诱导，发现在固体培养基上接种处理时毒害作用较小，四倍体的诱导率最高能达到66.7%。

There are obvious difference on morphology and cytology between polypoid and diploid.

四倍体与二倍体在形态学和细胞学上有明显差异。

The results showed that meiosis of the tetraploid melon was similar to that of diploid melon with some special behaviors.

结果表明：同源四倍体甜瓜花粉母细胞减数分裂过程与二倍体类似，但有其特殊性。

This paper also discusses the mechanism of occurrence of these aberrant embryos and discusses their relationship to diploid–tetraploid mosaicism.

文章也讨论了这种异常胚胎的发生机制，以及它与二倍体－四倍体嵌合体的关系。

ABSTRACT Objective: To determine polysaccharide contents in different intervarietal of diploidy and tetraploidy Banlangen, and to provide scientific evidences for developing and utilizing resources of Banlangen.

第二军医大学学报991015 摘要目的：测定二倍体的不同品系与四倍体板蓝根中多糖的含量，为综合利用板蓝根资源提供科学依据。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。