查询词典 fertility

In the offsprings of the aneuploids (P3) with 41~44 chromosomes, there are four types of plants with 29~32 chromosomes. Except the plant with 29 chromosomes, others which appeared abnormal meiosis behavior and poor pollen fertility are mixoploid.

在染色体数为44与41的两种超倍体（P3群体）后代，鉴定出具有29~32条染色体的4种非整倍体，除染色体数为29的植株外，其余均为混倍体，它们的减数分裂异常，花粉育性低。

From a P4 population, three monosomic plants with 37 chromosomes were identified with differing morphology and fertility.

在P4群体后代中鉴定出3株具有37条染色体的单体类型，形态与结实率均不相同。

Results The PGE 2 level of oligospermia group was higher than that of fertility group,and the...

精浆中前列腺素 PGE2 、PGF2 α的含量与男性生殖力有明显关系

Although the western medicine had great progress in treating this disease, and the artificial reproductive technolog has improved the chance of fertility due to azoospermatism and severe oligospermia, the natural pregnancy is expected by every couple.

虽然近十年来现代医学在男性不育症的治疗有了长足的进步，ART大大增加了无精子症和高度少精子症病人生育的可能性，但是自然的妊娠还是人人所期望的。

In conclusion, these results suggested that (1) the ageing-associated decline in fertility of female KM mouse was due to a decrease in both quantity and quality of oocytes;(2) the ooplasm from young mice did not correct the meiotic errors of aged mice, and the ooplasm from aged mice did not induce abnormal segregation of meiotic chromosome of young mice, indicating that meiotic anomalies found in the oocytes of aged mice might be related to nucleus or chromosomes and relevant factors;(3) a critical nucleocytoplasmic ratio was essential for normal maturation and segregation of meiotic chromosomes of oocytes and development to 2-cell embryos.

本研究结果表明：（1）昆明白小鼠与衰老相关的生育力下降是其卵母细胞数量减少和质量下降的综合结果；（2）年轻小鼠卵母细胞细胞质不能纠正老龄小鼠GV的减数分裂错误，老龄小鼠卵母细胞细胞质也不诱导年轻小鼠的GV发生减数分裂错误，老龄小鼠卵母细胞减数分裂异常很可能与细胞核或染色体及其相关因素有关；（3）关键的核质比对卵母细胞正常的成熟、减数分裂染色体分离及2-细胞期胚的发育是绝对必需的。

For example, we can use the basic data and the age structure of Panna model to further discuss the issues of aging and fertility policy.

例如，可以借助于基础数据，利用Penna模型中的年龄结构，进一步讨论老龄化问题，进而讨论生育政策问题等。

The dispersal unit is thus composed of sessile spikelet, rachis internode, and pedicel (the pedicelled spikelet falls separately), all of which contribute to the protection of the seed and are frequently ornamented or modified.In the more primitive members both spikelets of a pair are alike and fertile and are arranged in a terminal panicle. In most genera, however, the pedicelled spikelet has lost its fertility and differs in shape and texture from the sessile one.

驱散单位如此由无梗小穗，轴节间和花梗(pedicelled小穗分别下降)组成，其全部有助于种子的保护，在大多数属方面，不过，pedicelled小穗已经失去它的能育并且在外形上不同和来自无梗一的质地。

Through comparison and analysis, it is believed that, compared to other methods of prediction, that of the demand for phosphatic fertilizers in China from the viewpoint of maintenance of soil fertility is more objective.

经过比较分析，认为与其它预测方法相比，从保持土壤肥力的角度预测中国磷肥需求更为客观。

The research results indicated that in the genetic background of weak photo-sensitivity of flowering, photoperiodic sensitive genic male sterility and fertility restoration were controlled by two sep...

结果表明，在弱感光型遗传背景下光敏不育性及其育性恢复受两对独立的细胞核隐性主基因控制和修饰基因的作用。

The influence of different plantations on the soil fertility on Loess Platea.

黄土高原不同类型人工林对土壤肥力的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐