不育

Ejaculatory duct obstruction is a rare but importa nt cause of male infertility.

射精管梗阻是一种罕见现象，但却是男性不育的重要原因。

Anthers laterally coherent into a tube or sagittate at base, usually pellucid, emarginate, apex sterile.

侧面花药连着成筒或箭头形在基部，通常透明，，不育的先端。

The heterosis in practice production was mainly used by hand emasculation and male sterility.

在生产上，棉花杂种优势利用主要是通过人工去雄杂交制种和利用棉花核雄性不育系杂交制种两种方法。

Heterosis making use of the male sterile breeding be able to save large amount of emasculation labour,ensuring that seed purity.It is possible that breeding can be solved while the trend of single tea varieties and genetic breeding the problem of insufficient resources.

利用雄性不育育种可以节约大量母本去雄的劳力，保证种子纯度，充分发挥杂种优势，同时可以解决育种中存在的茶树品种趋向单一化和遗传育种资源不足的问题。

The epididymis was collected at 2 and 4 weeks after the operation.

目的 研究血管内皮生长因子及其受体2(VEGFR2)在实验性左侧精索静脉曲张大鼠附睾中的表达和定位，探讨VEGF、VEGFR2在精索静脉曲张致男性不育中的作用。

This research toke the upland cotton cytoplasmic male-sterile line P30A etiolation seedling as the material. Reference rice, maize and other crops'mitochondrial DNA bacterial artificial chromosome library construction methods, and unifies cotton itself to include the gossipol, tannin easily to oxidize materials'particularity, established a high quality mitochondrial DNA's BAC library system.

本研究以陆地棉细胞质雄性不育系P30A的黄化苗为材料，参考水稻、玉米等主要农作物线粒体基因组细菌人工染色体文库的构建方法，并结合棉花本身含有棉酚、单宁等易氧化物质的特殊性，建立了一套构建高质量线粒体基因组BAC文库的体系。

The low yield in seed production is an important limiting factor for the development of japonica hybrid rice, and the stigma exsertion rate of male sterile lines has a key effect on seed yield of japonica hybrid rice.

制种产量低是制约杂交粳稻发展的重要因素，而不育系柱头外露率是影响杂交粳稻制种产量的关键。

In order to elucidate the uppermost internode elongation of TGMS line with at gene, Changxuan 3S and its parent Pei'ai 64S were used to study the effect of temperature on panicle exsertion.

以隐性长穗颈温敏核不育水稻长选3S及其亲本培矮64S为材料，研究了温度对长选3S穗颈伸长的影响。

It has obvious toxicity for the reproductive system of female mammalian, which could cause the ovary tissue pathological change, disturbed ovulation and fecundation, lead to sterility provisional, both of the accepters of estrogen and progesterone were affected by cadmium, and the expression of genes as well.

可引起卵巢病理组织学改变，干扰排卵和受精过程，引起暂时性不育，还可能对雌激素受体、孕酮受体及基因表达产生影响。

Locoweed is one of the st serious toxic plants in the word, often caused a large number of livestock deaths, fetation miscarriage, premature birth, stillbirth and fetal dysplasia, high rate of empty fetation, Sire infertility etc, resulting in great loss of animal husbandry.

疯草是全球危害最严重的一类有毒植物，常引起大量的家畜死亡，孕畜流产、早产、死胎以及胎儿发育不良，空怀率高，公畜不育等，给畜牧业造成巨大的损失。

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％。