查询词典 reproductive

Meanwhile, we highlight several research corners for future further study, the trade-offs on resource allocation within perennial plant had not been proved, the relationship of neighbor effects and reproductive allocation was still not so clear for individual plant, there was no definite conclusion on perennial plant reproductive strategy under different neighbor effects and different habitats. The relationship between reproductive allocation and sexual allocation , the cause of resource distribution in anthotaxy structure, the similarities and differences of reproductive allocation and the maintain mechanism within all kinds of reproductivest rategy need a further investigation. In addition, a molecular study is required for explaining the variation mechanism and the biological meanings on seed size research.

指出生活史研究仍存在不足首先是研究内容上，资源分配在多年生植物中的权衡仍未被有力证明，邻体效应与繁殖分配的关系在个体水平上仍不明了，多年生植物在不同邻体效应和生境下将采取何种繁殖对策目前尚无明确的结论；繁殖分配与性分配之间的关系，引起花序结构上资源分配差异的原因，各种繁殖对策中繁殖分配异同与维持机制等问题仍有待于进一步的研究；种子大小的变异机制以及生物学意义仍未得到令人满意的答复，更需分子水平上的研究来解释其机理。

Sargassum for dioecism, sexual maturity, from the use of reproductive care on the formation of reproductive Waterloo oocyst discharge hole, adhesion in the reproductive care around fertilization.

羊栖菜为雌雄异株，性成熟时，由生殖托上形成的生殖窝孔中排出卵囊，粘附于生殖托周围进行受精。

Porcine reproductive and respiratory syndrome virus is classified in the family Arteriviridae in the newly created order Nidovirales. Typical clinical signs of PRRSV infection in susceptible animals include inappetence, fever and respiratory disease in pigs of any age and abortion or increased proportions of stillborn and weak-born pigs in pregnant animals.

猪繁殖与呼吸综合征(Porcine Reproductive and Respiratory Syndrome，PRRS)是由猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus，PRRSV)引起的一种严重危害养猪业的烈性传染病。

The reproductive output, reproductive efficiency and reproductive index of Humulus scandens increase with the increasement of intensity of fertilizer, but reproductive allocation and reproductive investment are indistinctively influenced by fertilizer treatments.

增加施肥强度可显著提高葎草的繁殖输出、繁殖效率和繁殖指数。

At present, research has been carried on about resources of green lacewing and its biology, ecology, ethology of common species, and reproductive technology on a large scale, natural feed and artificial feed as well. However, research on reproductive physiology respect of green lacewing now is less and hasn"t gone too far. This article has carried on certain studies on this respect, aiming at offering theoretical direction for giving play to green lacewing"s reproductive latent, raising artificial reproductive efficiency and field effective protection and utilization.

目前我国对草蛉的资源和常见种的生物学、生态学、行为学以及大规模繁殖技术做了广泛的研究，但目前草蛉的生殖生理方面研究的较少，认识尚不深入，本文就这方面进行了一些研究，旨在为发挥大草蛉的生殖潜能、提高人工繁殖效率及田间有效保护利用等提供理论指导。

Reproduction is a key process, which highly influences the economic efficiency of pig production. Traditional quantitative genetics plays a very important role in animal breeding. Selection for increased number of piglets born has been employed in pigs with only limited success because of the low heritability, the late expression in life and the sex-limited nature of reproductive traits.

中文题名猪ESR和FSH-β位点对猪繁殖性状的调控及其调控机理的研究副题名外文题名 Regulations of reproductive traits by ESR and FSH-β loci and the mechanisms involved 论文作者李凤娥导师熊远著院士学科专业动物遗传育种与繁殖研究领域\研究方向猪的分子遗传育种学位级别博士学位授予单位华中农业大学学位授予日期2002 论文页码总数115页关键词猪繁殖性状馆藏号BSLW /2003 /S828 /2 繁殖是养猪生产过程中的关键一环，该环节成功与否直接影响整个养猪业的经济效益。

The vast majority of follicles undergo a degenerative process in reproductive life. Apoptotic cell death is the fundamental mechanism in response to follicular atresia. Moreover, the apoptosis of granulose cells is implicated in directly mediating atretic process. Multiple studies have confirmed that the apoptotic process of GCs is not only related to apoptotic genes, but triggered by cytokines related to reproduction and Caspases family.

中文题名几种生殖激素对体外培养的牦牛卵泡颗粒细胞凋亡的影响副题名外文题名 Effects of several reproductive hormones on apoptosis of ovarian granulose cells of yaks in vitro 论文作者杨世华导师余四九教授学科专业临床兽医学研究领域\研究方向学位级别博士学位授予单位甘肃农业大学学位授予日期2002 论文页码总数108页关键词牛类固醇激素分泌卵泡颗粒细胞培养牦牛生殖激素馆藏号BSLW /2003 /S823 /1 卵泡闭锁是哺乳动物卵巢中极为普遍的自然现象。

In this study, nine aspects had been carried out, which included the condition optimization of inducing silkworm asexual reproduction; the effective technique of obtaining unfertilized eggs from virginal moth; the investigation of asexual reproductive genetic resources on bivoltine silkworm races; the creating of bivoltine female asexual reproductive lines; the genetic effect analysis of silkworm asexual reproductive character; the eggs protein study on different female lines; growing and developing comparison between asexual reproductive line and its sexual parent; RAPD study on asexual reproductive character; the utilization of asexual reproductive lines.

本论文主要研究内容包括：家蚕无性繁殖诱导条件的优化；从家蚕处女蛾获取未受精卵的实用技术研究；二化性家蚕品种无性繁殖特性的遗传资源调查；二化性雌蚕无性繁殖系的构建；家蚕无性繁殖性状的遗传效应分析；家蚕无性繁殖品种的蛋白质研究；家蚕无性繁殖品种与其两性亲本生长发育对比研究；控制家蚕无性繁殖性状的基因的RAPD分子标记探索以及家蚕无性繁殖系的利用研究等九个方面，取得的主要结果如下

Plenty of studies have been made towards unraveling the complex intraovarian control mechanisms that act in concert with systemic signals to solve some clinical problems, improve the outcome of assisted reproductive technology and establish the in vitro maturation system.

许多研究致力于探索卵泡发育的正常生理精确过程，以更好的了解人类配子发育过程及生殖奥秘，更好的解决一些临床疾病；在辅助生育技术(Assistant reproductive technology，ART)中提高临床妊娠率，建立完善的体内外卵子成熟的体系，这是人类生殖研究中一个重要课题。

Therefore, we selected common species of Ranunculaceae. comparative primordial plants in Alpine Meadow at Eastern QinghaiTibetan Plateau, and studied the reproductive strategies, such as reproductive allocation, especially sex allocation, to understand how the plants adapt the environmental conditions. The results showed:(1) At higher altitude, the self-incompatible plant, such as Trollius ranunculoides tended to become limited by pollination rather than by nutrient availability, while the self-compatible plants, such as Anemone rivularis and A. obtusiloba seemed not to be limited by pollen availability, which suggested that ability of self pollination for alpine plants may be a mechanism of reproductive assurance.(2) Influences induced by high altitude on the reproduction of these species occurred on different reproductive characters, which suggest species-specific adaptive strategies. The influences are dependent on plant size to some extent.

因此，我们选择在青藏高原东部的高寒草甸，以比较原始的植物类群—毛茛科植物为研究对象，选择一些常见种探讨其繁殖对策，如繁殖分配和性分配问题，试图揭示这些植物如何适应环境条件，最后的结果表明： 1高寒草甸高海拔区，自交植物(如小花草玉梅A.rivularis和钝裂银莲花A.obtusiloba)的繁殖不受花粉限制，而完全异交植物(毛茛状金莲花T.ranunculoides)的繁殖受花粉限制，表明高海拔地区植物的白花授粉能力可能是一种繁殖保障机制，能够避免恶劣环境对植物有性繁殖的不利影响； 2海拔高度对植物的影响因种而异，不同的物种受影响的繁殖性状不同，即使同属亲缘种间也存在差异，表明不同物种对相似环境压力的适应对策不同；而且，海拔高度对植物的影响在一定程度上依赖于植物个体大小，说明植物通过调整其个体大小与繁殖性状的关系来适应环境梯度的变化； 3植物花期和果期的繁殖分配并不完全随海拔升高而减小(只有小花草玉梅的果期RA随海拔升高而减小30％)，与Iwasa和Cohen的预测不完全一致(他们认为繁殖分配随生长季缩短而减小)。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。