The faultiness of breeding system and pests destroying cause the low seed-set rate.
五脉山黧豆的传粉系统不完善和虫害是结实率低的主要原因。
Responses of main characters of upland cotton to mass selection-mass crossing breeding system were studied.
研究了陆地棉主要性状对混选—混交育种体系的响应。
Objective To reveal the breeding system and endangered mechanism of Dendrobium officinale in Danxia landform.
目的：揭示丹霞地貌生境中铁皮石斛的繁育系统及濒危机制。
The experiment studies on virus-free seed potato miniaturization breeding system and matching commercial potato cultivation techniques .
本文研究了冀中南地区马铃薯脱毒种薯小型化繁育体系和配套商品薯栽培技术问题。
This photosensitive male sterility (PGMS) line produced by the expression of antisense-OsPDCD5 could be applied in production of hybrid rice using two-line breeding system.
这个通过基因工程的方法获得的光敏雄性不育系可应用到“两系法”育种中，用以生产杂交水稻。
The flowering phase and dynamics, insect visitors and their behavior and visiting frequency were observed, and the breeding system, pollen-ovule ratio (P/O) and pollen viability were determined.
的开花物侯、开花动态、访花者的种类、行为和访花频率，并对其繁育系统、花粉-胚珠比（P/O）、花粉活力进行了检测。
Using this technology, the purity problem during seed production in three-line, two-line or chemical-emasculated hybrid rice breeding system could be solved and some new combinations could be bred.
利用这项技术可望解决三系、两系或化学杀雄杂交稻制种过程中出现的纯度问题，且有利于新杂交稻组合的选育。
Flaws in the system have created a breeding ground for financial scandals.
制度中的漏洞给金融丑闻的滋生提供了土壤。
The fish's eggs were harvested as part of a captive breeding program and effort to restore giant catfish populations in the Mekong River system.
为恢复湄公河系统的巨鲶数量，作为圈养繁殖计划的一部分，这条鱼的卵被收成起来。
Perfect forage breeding, seed production and multiplication system.
进一步完善牧草育种及良种繁育体系。
Objective To investigate species, infection and breeding regulation of the intermediate host of Trichobilharzia in the Huaihe River System.
目的探讨淮河水系毛毕吸虫中间宿主椎实螺种类、感染情况及繁殖节律。
The theoretical basis of computer decision-making system for crop grey breeding, its development environment and procedure, main modules, functions and applications were introduced in this paper.
介绍了作物灰色育种电脑决策系统的理论基础、开发环境与流程、主要模块与功能，演示了其应用实例。
Heilongjiang Province remote training system of cow breeding is developed just for such demand.
黑龙江省奶牛养殖远程培训系统正是基于这样的需求而开发的。
It is an important guarantee that at the enterprise's system level to regulate, circumscribe, judge and manage the process of the breeding.
从企业制度层面对培育过程加以规范、约束、衡量和管理，是培育过程高效并获得成功的重要保证。
To meet the need of the quality breeding aim of our laboratory, to establish an effective selecting system on the basis of protein is the most important thing.
为了结合实验室大规模开展的小麦品质育种工作的需要，建立适用的小麦后代蛋白筛选体系在育种过程中是至关重要的。
The paper analyses the problems in flower breeding in China and gives some solutions on breeding method, institution and system.
综述以分析中国花卉育种目前存在的问题入手，从育种方法、机构制度等方面提出一些解决法。
The system is made up of six parts: system managing, data inputting, Statistics and query, breeding analysis, report making and print out, help.
系统由系统管理、数据输入、统计查询、育种分析、报表打印和帮助六大功能模块组成。
Objective To explore the effectiveness of permanently breeding SPF rats in individually ventilated cage (IVC) system with ing relative clean environment.
目的在相对洁净环境下使用IVC系统，观察长期饲养s PF级大鼠的效果。
The fourth is the information system for corn genetic experts, that is, the computer can help to choose the data of maternity and paternity according to the definite breeding purpose.
玉米遗传选育专家咨询系统，即针对确定的育种目标，计算机辅助筛选父本和母本的功能。
The ultrasonic add oxygen system for fish breeding has positive significance, but currently only found a few countries on ultrasound for fishery.
超声波增氧系统对鱼类养殖有着积极意义，但目前仅发现少数国家将超声波用于渔业上。
It was supposed that proper root number, much branches and deep-root is a development direction of breeding for ideal type root system in rice.
提出控制根数量、适当增加分枝根数目和加深根分布是未来开展水稻根系育种、塑造水稻理想根型的基本方向。
The state practises a system of immunization planning for execution of compulsory immunization against animal epidemics which cause serious damage to the breeding production and human health.
国家对严重危害养殖业生产和人体健康的动物疫病实行计划免疫制度，实施强制免疫。
Adequate root number, deep root system, and efficient root activity per unit of root biomass will be needed for high-yield rice in the future breeding programs.
提出了未来水稻根系育种的一个方向，既适当控制根系的数量，增加根的平均长度，加深根在土壤中的分布，扩大根系的面积以及提高单位根量的根功能。
The trained neural network model of this system, network model after training of can be able to predict water quality of the breeding ponds.
该系统训练后的神经网络模型，能实现对养殖池塘水质的预测。
So, the technical system of anther culture in potato remains the major factor restraining haploidy breeding.
因此马铃薯花药培养技术体系仍是制约马铃薯单倍体育种的主要因素。
Enhance the research on economic plants introduction and acclimatization, and construct breeding base and spreading system of excellent varieties of economic plants;
加强经济植物的引种驯化、品种选育工作，建立经济植物良种苗木繁育基地和推广体系；
The silkworm, Bombyx mori, as a completely domesticated insect with good breeding and genetic system, has been considered as an ideal model for Lepidoptera.
家蚕作为一种完全人工驯化的经济昆虫，拥有良好的饲养体系和遗传繁殖体系，其个体适中，已被认为是研究鳞翅目昆虫理想的模式生物之一。
System analysis are used to study the main factors and their interrelations which affect economic efficiency of animal breeding improvement and the optimization of animal breeding scheme.
应用系统分析的思想和方法，分析了影响动物育种改良经济效益的主要因素及相互关系，并在定量描述这些相互关系的基础上探讨了育种方案的优化方法。
System analysis are used to study the main factors and their interrelations which affect economic efficiency of animal breeding improvement and the optimization of animal breeding scheme.
应用系统分析的思想和方法，分析了影响动物育种改良经济效益的主要因素及相互关系，并在定量描述这些相互关系的基础上探讨了育种方案的优化方法。
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