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The results showed that the best effect of autotetraploid was obtained with 2.0 gL-1 colchicine solution for 6 times, and the frequency was 4.5%.

结果表明:经2.0 gL^(-1)秋水仙素处理6次获得同源四倍体的效果最佳,四倍体诱导率达到4.5%。

All these contributed to the genetic selection and improvement in rice breeding. As mentioned above, the results are not only helpful to promote the process ofrice improvement, but also to confirm the basic for further study of autotetraploid rice.

上述产量、品质性状及遗传差异分析的结果,不仅有利于加快同源四倍体水稻的遗传改良进程,而且为进一步研究、利用同源四倍体水稻奠定了初步基础。

In the crosses of the autotetraploidy rices used as the females, some seeds could be got, but more seeds were obtained in these crosses by the special treatment that the DH solution was put into the caryopses before the pollination.

在以同源四倍体水稻为杂交母本的杂交组合中,可以获得一些实粒种子,但是,如果在授粉前利用DH溶液对同源四倍体水稻的去雄颖花进行处理后再授狼尾草的花粉粒则能获得更多的实粒种子。

Objective: To purify caffeic acid tetramer with macroporous resin on the basis of its fundamental physicochemical stability research.

中文摘要:目的:初步研究咖啡酸四聚体的理化稳定性的基础上选择合适的大孔吸附树脂,去除杂质,提高紫草水溶性部分中有效成分咖啡酸四聚体的含量。

We could get a better induction effect when we treated at the inflorescence out 1/4,or the another co- lor changing from light green to green-yellow color .It was just the period chromosome changed from bouquet stage to diakinesis stage.

在秋水仙素诱导小报春体细胞的研究中:以0.05g L~(-1)浓度的秋水仙素浸泡萌动种子48h得到1株四倍体;组培诱导中,以秋水仙素加入培养基中,秋水仙素浓度为0.1gL~(-1)处理一周获得2株四倍体小报春。

Telomerase TMPYP4 with four good-binding chain is expected to become a new type of telomerase quadruplex stabilizers.

TMPYP4与端粒酶四链体结合较好,有望成为一种新型的端粒酶四链体稳定剂。

The optimization of heat shock conditions for producing tetraploidy loach was treated the fertilized eggs for 4 min with 41℃ water after fertilization about 20 minutes.

采用热休克抑制受精卵第一次卵裂、Ag-NOR计数鉴定四倍体胚胎的方法,探索了诱发四倍体泥鳅的最佳条件是:在受精后20 min左右采用41℃热水持续处理泥鳅受精卵4 min。

The DNA contents of the majority of multiple pengze crucian carp studied were close to that of tetraploidy, and the DNA contents of the minority of multiple pengze crucian carp were between that of triploid and tetraploidy.

结果显示,复合鲫的DNA含量明显多于母本种彭泽鲫的DNA含量,且所测14尾中多数个体的DNA含量超过或接近四倍体的DNA含量,少数个体的DNA含量介于三倍体和四倍体之间。

Part one studies the sequence techniques, including the original sequence and its magic cube table, the sequence distribution in each movement and the sequence application techniques in different parts; Part two is a study of chord structure, consisting of fourth-fifth chords that are comprised of tritone, polychords, tall chords, note-cluster chords, as well as whole-tone scale chords; Part three is to analyze the techniques of polyphony, involving the counterpoint of melody and that of rhythm; Part four examines techniques of orchestration, such as those of conventional orchestration and of unconventional orchestration, and the figure of changing track of orchestration acoustics; Part five is a research of musical form structure, including illustrations of musical form structures in all movements, in addition to the effects of timbre, performing methods, dynamics, and density on musical form structural force.

本文将从五个方面来分析研究王西麟《第三交响曲》:第一,序列技术研究,其中包括原始序列及其魔方表、序列在各乐章的分布、多声织体中的序列应用手法;第二,和弦结构研究,其中包括三整音叠置的四五度和弦、复合和弦、高叠和弦、音块式和弦、全音音阶纵合化和弦;第三,复调技法研究,其中包括旋律对位、节奏对位;第四,配器手法研究,其中包括常规配器手法、非常规配器手法、配器音响效果变化轨迹图;第五,曲式结构研究,其中包括各乐章曲式结构图示,以及音色、演奏法、力度、织体密度对曲式结构力的影响。

Vitrification, chlorosis, scale-shaped differentiation and failure to root of regenerated shoots frequently occur in industrialized production of tetraploid watermelon Citrullus vulgaris L.

西瓜四倍体工厂化生产中存在试管苗玻璃化、黄化死亡、鳞片状分化、不生根等不利问题,在MS中NH4NO3 含量减半的情况下,前两者可得到有效的控制;用连续增殖、连续壮苗的方法,解决了西瓜四倍体鳞片状分化的难题;用茎尖扩繁的最佳培养基为MS(含半量NH4NO3 )+2 。

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