无性系地

Efficient callus induction and regeneration procedure were established using growing tip of octoploid triticale 'h739' at glume differentiation stage as explants.Embryonic somaclones were selected.

利用八倍体小黑麦'h739'护颖分化期幼穗作外植体，成功地建立了愈伤组织诱导和再生程序，并获得了长期保持胚性的无性系。

The description in growth characters and genetic variation of 7 new clones of Populus Deltoides is given in this paper.

本文对美洲黑杨7个新无性系在水培条件下的生长特性和遗传变异规律详细地进行了描述。

At the same time, the information of flax biotechnology of anther culture, haploid breeding, utilization of somatic mutation, protoplasmic culture, gene transformation were introduced in detail.

从亚麻花药培养、单倍体育种、体细胞无性系突变体的利用、原生质体培养、转基因技术的研究等方面详细地介绍了我国亚麻生物技术的发展状况。

Based on the results of information investigation, the paper briefly summarizes the research and application of cell engineering technology in agriculture: Chromosome engineering,protoplast culture,anther culture, cell culture, tissue culture and somatic hybridization. The worldwide development and progress in the application of cell engineering in plant breeding are reviewed.

根据文献研究结果，系统地综述了染色体工程技术、原生质体培养、花药培养、细胞培养与无性系筛选、组织培养与体系胞杂交等细胞工程技术，在国内外农作物育种上开发应用后所取得的新进展、新成果，以及这些新成果的产业化，对促进中国农业生产的发展所起的作用。

Various clones families could be propagated commercially without having been clonally tested.

在这些家系中不同无性系被大量地繁殖，也没有进行无性系的测定。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。