不育

In plants this is sometimes overcome by the doubling of the chromosome number, giving an allopolyploid.

在植物中，这种不育现象有时可因为染色体数目加倍而抵消，产生同源多倍体。

Discussions are given of the fate of Ms2 during translocation in the hexoploid triticale, the exchange of the names for 4A and 4B chromosomes in common wheat and the possible expoitation of the new locus Ms2 (4BS), and the following speculations are made: In geneic genes of allopolyploid organisms the donor chromosomes tend to be intergenomically translocated to their phylogically and evolutionarily close chromosomes with the same order number and the same arm; it is cofirmed that the 7th International Conference of Wheat Genetics was right to exchange the names between chromosomes 4A and 4B of common wheat in 1988; and as a new genetic marker and a breeding tool for all the chromosome B-carrying species in the tribe of Tritceae, Ms2 (4BS) may have wide application in building and expanding the gene pool of germplasm resources of various species of wheat.

对 Ms2基因在六倍体小黑麦与原太谷核不育小麦远缘杂交中易位时的走向，普通小麦4A与4B染色体的互换更名以及 Ms2(4BS)新位点的开发利用进行了讨论：认为异源多倍体生物核基因的组间易位倾向于从供体染色体向进化亲缘关系较密切，且染色体序数与染色体臂相同的部分同源染色体易位；1988年第7届国际小麦遗传学会对普通小麦4A与4B染色体的互换更名是正确的； Ms2(4BS)作为一个新型的遗传标记，作为小麦族内所有携带B染色体组的物种的育种工具和在拓建各类小麦种质资源的基因库等方面均有广泛的用途。

Since microspore mother cells showabortion during the first meiotic divison,it is suggested thatthe early male abortion is frequently associated with variousdegrees of impairment to the fertility to the female〓amate.

研究的27个杂种第一代中，有11个组合的产量超过对照或与对照持平，占总组合数的40.74%。在强优势组合中，不育细胞质带来的负效应不足以使F1产量的显著降低，而且通过杂优补偿作用可比对照有所提高。

Chromosome abnormalities are the important cause children amentia as well as sterility and miscarriage in adults,and so that developing the heredity consultation, making prenatal detection and prenatal diagnoses for intervention.

染色体畸变是儿童智力低下，成人不孕不育、流产，性征异常的一个重要原因，要实现优生优育，必需积极开展遗传咨询，产前检查和产前诊断。

The chromosome constitution on H96276-2, which is a stable line derived from a sterile wheat-Agropyron intermedium partial amphiploid Zhong 3 cross to common wheat Hui 75, was analyzed by sequential GISH and FISH.

利用顺序基因组-重复序列原位杂交技术对1个来自中3不育系和普通小麦恢75杂种后代稳定株系H96276-2的染色体组成进行了分析。

The chromosme constitution on H96276-2, which is a stable line derived from a sterile wheat-Agropyron intermedium partial amphiploid Zhong 3 cross to common wheat Hui 75, was analyzed by sequential GISH and FISH.

利用顺序基因组-重复序列荧光原位杂交技术对1个来自中3不育系和普通小麦恢75杂种后代稳定株系H96276-2的染色体组成进行了分析。

Objective: To evaluate the effect of testis homotransplantation in the treatment of androgen deficiency and infertility.

目的：探讨同种异体睾丸移植术治疗男性雄激素缺乏及不育的疗效。

Using potassium antimonite technique, the development of the tapetum and Ca^2＋ distribution in a genie-cytoplasmic male sterile line of Zhenshan 97A and its maintaining line Zhenshan 97B was studied.

利用焦锑酸钾沉淀法研究了野败不育系珍汕97A及其保持系珍汕97B绒毡层细胞的发育过程及其细胞中Ca^2＋的分布变化。

Using potassium antimonite technique, the development of the tapetum and Ca(superscript 2+) distribution in a genic-cytoplasmic male sterile line of Zhenshan 97A and its maintaining line Zhenshan 97B was studied.

利用焦锑酸钾沉淀法研究了野败不育系珍汕97A及其保持系珍汕97B绒毡层细胞的发育过程及其细胞中Ca(上标 2+)的分布变化。

Keywords: Male sterile line; Alfalfa ; backcross; tissue culture; cyto-morphology

中文关键词：雄性不育系；苜蓿；回交；组织培养；细胞形态学

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％。