不育

It had fine horticultural characters and stable sterility inheritance according to Mendel's law controlled by a pare of nuclear recessive genes.

该两用系综合农艺性状优良，其不育性由细胞核内一对隐性基因控制，败育彻底，能够按照1：1育性分离比例稳定遗传。

Microspore abortion of H9A occurred in the early uninucleate stage. The tapetum cells were in extreme hypertrophy so that tetrads were extruded to crack and break down and could not form normal uninucleate pollen grains; the abortion type was sporophyte.

结果表明，雄性不育材料H9A的小孢子败育发生在单核前期，由于绒毡层细胞极度膨胀，四分体受挤压后破裂并降解，无法形成正常的单核花粉粒，属于孢子体败育。

The application value of alloplasmic lines and the two new CMS-patterns were evaluated from various aspects,the possible reasons of cytoplasmic variation and the relativity degenerative pattern of pollen grain and the fertility behavior were discussed

从不同侧面评价了异质系及新不育系的利用价值，讨论了细胞质变异的可能原因及花粉败育类型与育性恢复性能的相关性。

The Vg-negative reaction of the triploid female rainbow trout could not provide full evidence for the impossibility of liver to synthesize Vg. That Vg was not synthesized resulted from insufficient estradiol due to the retardation of ovaries development, the un-differentiation of follicular cells and the lost interaction of germ cell and somatic cells. It could be concluded from yolk genesis that the shortage of female triploid rainbow trout's Vg resulted from the abortive ooecium, but did not result in sterility.

由于三倍体雌性虹鳟卵巢发育受阻，无滤泡细胞分化，生殖细胞与体细胞的互作缺失，不能分泌足量的17β-E2以诱导Vg的合成，因而肝脏的Vg阴性并不能说明肝脏不具备合成Vg的能力，从卵黄发生的角度分析，卵黄蛋白原的缺乏不是导致三倍体虹鳟雌性不育的原因，而是其卵泡败育的结果。

is that Tai Yu-D2 male sterile lines abortion occurs in monokaryon stage, the tapetal expanding abnormally occurs in dyadphase stage, pollen aborts completely, is a type of no pollen.

泰玉D2不育系花药绒粘层在二分体时期成辐射状膨大，小孢子在单核期败育，花粉败育完全，属无花粉类型。

Microscopic observation of microsporogenesis of the male sterile lines revealed that abortion occurred mononuclear stage. The tapetal cells became higly vaculate, pressing the microsporocyte seriously, interfering the normal microsporpgenesis development and finally leading to pollen grain abortion.

进一步对其细胞形态学进行观察结果表明，ogura和改良型不育系败育时期发生在单核花粉期，绒毡层异常膨大，挤压小孢子正常发育，小孢子液泡化而导致败育，并且在花药发育过程中有一些异常现象发生。

Sweet pepper restorer lines 5-2R_1,5-2R_2 and 5-2R_3 were developed by northem flat lantern sweet pepper,alfalfa garden early-maturing hot pepper in Nanjing and high lantern sweet pepper 5-2 by means of cross,backcross,self-pollination and testcross.

尖辣椒品种中容易找到甜椒CMS育性恢复基因；而甜椒品种中容易找到保持CMS育性的不育基因。84-1、匈奥804、湘紫13、伏_M、线椒、NT2M、牛-1、5-2R_1和5-2R_3这9个恢复系的恢复基因处于同一位点。3。

Under four kinds of different temperature of 20 21,23 25,pollen fertility and rate of selfed seed setting of Dl 8 and D23 are increased a little,their fertility altered.

3水稻光温敏核不育系D18和D23经过幼穗分化不同时期的低温处理，花粉育性和自交结实率有一定的提高，育性得到了转换。

Their expression of sterility and the sterility variance with temperature at different development stage were investigated under control conditions by using phytotrons simulating the daily change of air temperature and other factors.

同一发育时期不同温度处理，不育系07A和陕2A的育性随温度的变化而呈型曲线，不育性受盛蕾期温度影响最大的温度值在日均温5℃左右。

The flowering temperature, the vigor of stigma and pollen, the reason of self-hybrid degeneration in radishes was studied. The results showed that: structure of flower organ of malt sterile line in radish is different from its maintainers and normal plant (self-hybrid plant). Anther's development has three types: they are yellow degenerative corolla, abortive pollen, and half-abortive pollen. The flowering period of winter radish is 30～45 days. Flowering amounts a day is significantly positively related with temperature.

对不同类型萝卜开花温度、柱头和花粉活力、自交退化原因进行研究，结果表明：萝卜雄性不育系花器结构与保持系及正常植株有较大差异，花药发育有黄化、败育、半不育三种类型。

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