查询词典 plant breeding

Then the promoter CaMV 35S driven, plant siRNA expression vector pARB with inverted repeats of BBEwas constructed based on the vectors pHANNIBAL and pART27. The work will lay the foundation for breeding a low morphine and high thebaine poppy.

以中间载体pHANNIBAL和植物表达载体pART27为基础，构建了CaMV-35S启动子驱动的含小檗碱桥酶基因片段反向重复序列的RNAi双元表达载体pARB，为培育低吗啡，高蒂巴因的罂粟新品系奠定了基础。

The cloned BBE gene sequences were 94.84% identified with the reported BBE genes in GenBank previously. Based on the cDNA sequences of COR and BBE ,two fragments about 400～500 bp from each gene with lower identity among them were cloned. The fusion gene BC (744 bp) is fused by the PCR technique. Then the promoter CaMV 35S driven, containing'forward BC fusion fragments-reverse pdk intron-reverse BC fusion fragments', plant siRNA expression vector were constructed based on the vectors pHANNIBAL and pART27.The work will lay the foundation for breeding a low morphine and high thebaine poppy.

利用blast及分子生物学软件DNAStar对COR和BBE基因的cDNA序列同源性进行分析比较，分别从各基因中筛选和克隆了一段同源性极低、约400～500 bp的片段；并应用重叠PCR法将其拼接成744 bp的融合基因BC，以中间载体pHANNIBAL和植物表达载体pART27为基础，构建了以CaMV 35S启动子驱动的含有"正向BC融合片段- pdk内含子-反向BC融合片段"的ihRNAi植物表达载体，通过转化野生罂粟，初步研究了以COR和BBE基因为靶标的RNAi对内源吗啡合成的抑制效果，为进一步培育低吗啡高蒂巴因的罂粟种质提供了依据。

As a homologous triploid plant, it is very difficult to create new varieties by traditional hybridization and seedling breeding methods.

中国水仙(Narcissus tazetta var.chinensis)是世界著名的球根花卉，也是我国传统名花中出口创汇的重要种类。

A plant expression vector harboring multi-genes has good potential in breeding crops with many excellent agronomic traits.

多基因植物表达载体用于植物遗传转化是培育具有多种优良品质作物的有效策略。

From differentiation of soybean varieties and photoperiod adjustment, anatomical differentiation essence of different types of stem termination soybean varieties, variation law of stem termination development under different photoperiod treatments, effect of long day on the terminal raceme of soybean, regulation rules of AGAMOUS gene among different soybean varieties and under different photoperiod treatments were studied, which would provide theory base of plant type breeding of soybean especially improvement of podding-habits and cultivation and management of soybean.

因此，试验于2006和2007年在中国农业科学院作物科学研究所完成，主要从大豆的品种差异和光周期调控入手，利用解剖学和分子生物学技术，研究不同结荚习性大豆品种的本质差异、大豆在不同光周期处理下茎顶的变化规律，进一步明确长日照对大豆顶端花序的影响，及AGAMOUS基因在不同光周期处理下大豆品种中的表达规律，为大豆株型育种特别是结荚习性的改良及大豆栽培管理提供理论依据。

The apomictic research progress in plants is summarized, including the approaches of fixing heteroses, selecting and breeding of plant varieties and apomictic materials, embryology, genetics, apomictic characteristics and so on .

介绍了植物无融合生殖在选育无融合生殖品种及育种材料方面的成果；概述了植物无融合生殖在胚胎学、遗传学及生殖特性，杂种优势固定途径及无融合生殖材料选育途径等方面研究的现状和趋势。

The selection methods applied in soybeen breeding are those used in improving autogamous plant species.

大豆育种工作中应用的选择方法即是那些用于改良自花授粉植物的方法。

Number (0.94), axillary carpellate flower number(0.45),plant hight(0.62)had high broad genetic gain,At breeding would g et more

取得更为显著的选择效果。关键词：北美驼绒藜；主要性状；遗传变异

Gl_2~e is a gene controlling glandless traits in cotton plant and seed, which is an important gene resource for gossypol-free cottonseed breeding.

Gl_2~e基因是控制棉花植株和种子无腺体的一个基因，是低酚棉育种中一个重要的基因资源。

Graminaceae ; Tissue culture: Regulation of gene expression ; Micropropagation ; Gremplasm conservation ; Crop breeding ; Somatic hybrization ; Gene transfer techniques ; Plant genie engineering

禾本科植物；组织培养；基因表达的调控；无性系繁殖；种质保存；作物育种；体细胞杂交；基因转移技术；植物基因工程

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。