不育

Therefore, the main cause of pollen abortion was the tapetum disintegration delay.

因此，绒毡层延迟解体是萍乡显性核不育水稻不育株败育的主要原因。

There is a distinct correlativity between zymogram distance of maize combination and seed yield heterosis, but toba...

雄性不育系与可育系的同工酶酶谱存在着明显差异，并且不育系的同工酶活性降低。

There were on unique different protein observed in flag leaf at different development stage; but unique different protein were found in anther at binucleated stage and the male-sterile materials lack a 31 kD polypeptide compared with normal material.

结果表明，从不同发育时期的旗叶可溶性蛋白中尚未发现特异蛋白的存在，但在花药中发现有特异蛋白的存在，表现在二核期生理型雄性不育界遗传型雄性不育材料均比正常的可育材料缺少了1条分子量为31kD的多肽。

Ms is a dominant sterile gene and Rf is a dominant epistatic gene.

萍乡显性核不育水稻不育株的育性由两对显性核基因Ms〓和Rf〓互作控制。

Inoculation of leaf on Helminthosporium Maydis Nisk and observation of anther and pollen and fertility restoration-retention identification indicated that JnA should be classified into group S of cytoplamic male sterility. At the same time, fertility observation of F2 and microscopy identification of F1 pollen through I-KI dyeing confirmed this conclusion.

首先对玉米细胞质雄性不育系JnA进行小斑病菌接种鉴定，同时对其花药、花粉形态观察，通过恢保关系鉴定，F2育性分离观察及F1花粉碘液染色镜检，初步确定JnA属于S组细胞质雄性不育。

Four male sterile lines of different nuclei genotypes with the same cytoplasm of Aeglops bicornis ,msbicorj-83 (37 65. ms-yanshi 9^ ms-80 (6) and ms-90-110, were selected as the materials in the study on gene location of B -type cytoplasmic male sterile lines by using monisomic analysis and nullisomic -tetrasomic analysis methods.

本研究选用4个同质异核二角型不育系ms-83(37)65、ms-偃师9号、ms-80(6)及ms-90-110为材料，采用单体和缺四体两种方法对二角型不育系进行了育性基因定位。

Analysis of fertility segregation pattern from F1, F2 and BC1 indicated that the sterility trait of 0A15-1 was controlled by a single recessive gene and belonged to sporophytic male sterile type.

通过与明恢63、优B和广陆矮等多个父本的杂交，其F2和BC1群体的育性分离比都揭示0A15-1的不育性状受一对隐性核基因控制，并且为孢子体型雄性不育。

The results shows that the tapetal expanding abnormally occurs in dyadphase stage, microspore abortion occurs in the early of monokaryon stage, disaggregation in the end of monokaryon stage, only some spall of microspore is observed in monokaryon stage, the four cell walls also exist, the tapetal cells became completely vacuolated, almost filled the whole locule. vascular bundle of male sterile line anther vanish at mature pollen stage.

结果发现花药绒粘层在二分体时期发生异常，小孢子在单核前期开始败育，至单核后期完全解体，花药发育后期不育系药腔中只观察到少量的小孢子残体，花药壁的四层细胞依然存在，绒粘层细胞已经彻底液泡化，占据了药腔的整个空间，花粉成熟期不育系花药维管束消失。

This study focused on the mRNA decay process of the transcripts of the candidate sterile gene in maize Zea mays L.

本研究对玉米S型细胞质雄性不育中胞质不育候选基因的转录产物在核恢复基因的作用下被降解并引起育性恢复的生物学机理进行了探讨。

In order to study the effects of NEA male sterile cytoplasm on major characters of F1, the differences between the male sterile and normal cytoplasms of the NEA plants were investigated.

为了探讨NEA细胞质相对效应，对选育出的甘蓝型细胞质雄性不育新材料NEA的不育胞质和可育胞质杂种F112个主要性状进行了比较研究。

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