系统育种

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。

Whenever two or three dog fanciers get together there is almost sure to be talk about line breeding.

Brackett 博士在他的《计划育种》一文中说的那样：每当两三个犬友聚在一起的时候，那几乎谈论的是关于系统繁殖的话题。

This paper reviews plant regeneration, genetic transformation and genetic improvement of carnation.

本文对香石竹的再生体系、遗传转化体系及其分子育种现状作了较为系统的总结。

To be honest: our system of regional exclusive rights make it easier to fight illegal propagation. The last years we have tried together with other breeders to convince key parties in China that PBR is necessary in order to increase investment in China.

老实说呢，我们的区域专属权系统处理非法繁殖的工作更容易进行，过去几年来我们和其他育种公司尽力希望中国官方能了解品种保护的重要性，提高品种保护对于国外园艺公司增加投资中国的行动，绝对是必要的项目。

Further more, high-oilized normal corn could also be used as seed in high oil corn production.

因此，如何提高杂种优势的潜力，发展新的高产玉米生产系统成为玉米育种的重要课提高玉米杂种优势的途径主要有两种：一是继续提高自交系间杂种优势水平，对此国内外已多有研究；二是利用杂交种间优势，也就是通

Cryopreservation of fish gametes and embryos plays an important role in the preservation of seed resource, cryobiology, genetics breeding and aquaculture.

鱼类配子和胚胎的冷冻保存对鱼类种质资源保护、低温生物学、遗传育种和水产养殖业都具有重要的意义。胚胎的冷冻保存是一项系统工作，一个环节处理不慎，都会导致整个冷冻保存实验的失败。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。