油菜雄性核不育系及其等位可育系小孢子发育过程的比较研究。
Microsporogenesis Comparison of Genetic Male Sterility Line and Its Allele Fertile Line in Brassica napus l.
小孢子发育过程涉及花药发育到花粉粒成熟过程中一系列基因的表达。
The expressions of a series of genes are involved in the anther and pollen development.
当小孢子发育至成熟期，细胞内的微管束变得纤细，而网络则变得紧密。
At the late stage of microspore formation, microtubule bundles became thinner and reticulately oriented to form a tightly knitted network.
对矮败小麦中的可育株和不育株进行了小孢子发育过程的细胞形态学观察。
Observation was made on the cell morphology of the microspore development of the sterile and fertile plants in the Aibai wheat.
水稻的小孢子发育，通常都能看到有二次孢壁下陷过程，称之为第一和第二收缩期。
It is well known that there are twice failings of microspore wall called first and second contraction phases individually in the rice microspore development.
小孢子发育的超微结构观察发现，晋A不育系在造孢细胞增殖时期即表现出败育迹象。
Through ultra-structure observation, it is found that the microspore of Jin A began to abort at the stage of sporogenous cell division.
利用光学和电子显微镜对玉米C型胞质雄性不育系和保持系的花药与小孢子发育过程进行对比观察。
The development processes of anthers and microspores of C-cytoplasmic male-sterile lines and its maintainers in corn were observed and compared by the light and the electron microscope.
同一花药不同花粉囊相同一药室，花粉母细胞减数分裂和小孢子的发育，并不是高度同步的。
It is not synchronous highly that the meiosis of pollen mother cells and the development of microspore in the same anther but different pollen sac and in the same anther chamber.
用光镜和透射电镜的系统观察表明，小孢子母细胞间胞质通道的发育是棉花小孢子发生过程中最显著的特点之一。
Light and electron microscopy studies revealed that the cytoplasmic channel in the wall of adjacent meiocytes was an obvious feature during microsporogenesis in Gossypium hirsutum.
草莓小孢子细胞学发育时期与花器外部形态、大小密切相关。
It is of great interrelation between cytology growing period of strawberry's microspore and the outside shape and size of flower organ.
在花药发育的第9-11阶段能够检测到基因的表达，并且主要是在绒毡层细胞表达，小孢子中也有较微弱表达。
OsC6 expression is mainly detectable in tapetal cells and weakly in microspores from stage 9 to stage 11 of anther development.
最终有92.6%—94.8%的小孢子能发育成形态正常、染色能力强的成熟花粉粒。
Finally, 92.6%-94.8% of microspores could develop into normal and stainable pollen grains.
利用石蜡切片技术观察了埃及白睡莲的大、小孢子的发生，雌、雄配子体的发育，受精作用以及胚和胚乳的发育。
The megasporogenesis, microsporogenesis, female and male gametophyte development, development of embryo and endosperm were observed by using paraffin wax.
在凹叶厚朴大、小孢子发生和雌、雄配子体发育过程中存在部分败育现象。
The megasporogenesis and microsporogenesis and the development of their female and male gametophyte are partially abnormal.
沙田柚雌雄配子体发育进程有明显差异，小孢子与雄配子体发生较早，持续时间较长；
There is an obvious difference in the developing process of female and male gametophyte.
小孢子进一步发育形成正常的花粉粒。
吉祥草花器官发生发育过程中出现雌蕊群发育停滞现象，以及吉祥草在小孢子及胚珠发育过程中出现败育情况，可能是吉祥草属结实率低的重要原因。
The stasis phenomenon of gynoecium development occurred in floral organogenesis of Reineckia and the abortion of microspore and ovule may be the important causes of its low seed bearing ratio.
小孢子离体培养的最佳发育时期是单核期；
The best development period for microspore culture is monokaryotic stage;
小孢子离体培养的最佳发育时期是单核期；
The best development period for microspore culture is monokaryotic stage;
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