microspore

The polarity in the mature egg is prominent ( 4) Microspore archesporium is of multicellular, the anther wall conforms to basic type, and the tapetum is glandular.

小孢子孢原为多细胞，药壁为基本型，具腺质绒毡层；

Before meiosis the microsporocytes have lipids in cytoplasm. After microspore mitosis the lipids increase and size.

小孢子母细胞减数分裂前,细胞质内含有脂滴, 小孢子有丝分裂以后,脂滴增多增大.

The sporogenous cell develops into microspore mother cell.

造孢细胞直接发育成小孢子母细胞.

Complete disintegration of cytoplasm at stage of vacuolated microspore.

单核液泡期的小孢子细胞质完全解体.

Rape have established regeneration system of cotyledons, hypocotyls, protoplasts and microspore culture.

油菜已经建立了子叶 、 胚轴 、 原生质体及小孢子培养的再生体系.

Therefore you can defect the microspore cytology growing period according to the shape, size, color of the flower organ. So the research will be applied to direct suitable inoculation period in haploid breeding.

因此，只需依据其花器形态、大小、颜色即可确定小孢子细胞学发育时期，这项研究成果可应用于单倍体育种直接判别花器的适宜接种时期。

Objective : To determine the self-compatibility of Platycodon grandiflorum and the location of microspore germination on stigma.

目的: 确定桔梗的自交亲和性及花粉粒在柱头上的萌发部位.

Microspore abortion occurred after the tetrad formation.

小孢子败育发生在四分体形成以后.

The Structural Changes of Golgi apparatus During the Microspore Development in Gossypium hirsutum

棉花（Gossypium hirsutum）小孢子发育中高尔基体结构的变化

The meiotic division of the microspore mother cell of Eucommia ulmoides Oliv belong to simultaneous type.

杜仲（Eucommia ulmoides Oliv）小孢子母细胞减数分裂属同时型。

During the mitosis of microspore mother cells, the nucleus of tapetum divides into two. The primary sporogenous cells develop into microsporocyte by mitosis. The microsporocyte undergoes simultaneous meiotic division and produces tetrahedral tetrad.

初生造孢细胞经过有丝分裂，形成次生造孢细胞，然后次生造孢细胞发育成小孢子母细胞，小孢子母细胞经过减数分裂形成四分体，胞质分裂为同时型。

The nucleus in shrinking cytoplasm of microspore mother cell enters into diakinesis stage .16.

收缩的小孢子母细胞中核进入减数分裂终变期.

Stable-lines could be developed through platform of microspore culture derived DH ( double haploid) breeding technique within two years and stable variety could be produced within 4 years.

利用大麦小孢子加倍单倍体育种技术平台，二年内就可获得种性稳定的株系，四年内即可参加新品种区试。

Mature microspore was two-cell type and minority was three-cell type.

成熟花粉粒为2-细胞型，少数为3-细胞型。

Meiosis of microspore mother cells is synchronous or unsynchronous.

小孢子母细胞减数分裂同步或不同步.

Cytokinesis is of the simultaneous type and microspore tetrads are mainly tetrahedral.

小孢子母细胞减数分裂为同时型.

The chromatin of tapetal cell has a period of becoming condensed and then spreading accompanying the meiosis of the microspore mother cells, which will affect the entering of nutrient into the inner part of microsporangium.

绒毡层细胞的染色质伴随着小孢子母细胞减数分裂有一个浓缩和伸展的时期，这个时期影响营养物质向小孢子囊内部转运。

Tissue culture, such as microspore cultureembryo technique was widely developed in rapeseed breeding and fundamental studies.

小孢子技术、体细胞原生质体融合技术等组织培养手段已广泛应用于油菜育种及基础性研究.

Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.

小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。

The ubisch bodies which appeared on the inner tangential wall of the tapetum at the time of microspore wall formation are partially remain on the surface of matured pollen grain.

小孢子壁形成时开始在绒毡层内切线壁出现的球状体到花粉粒成熟时仍有一部分附着于花粉粒表面。

The microspore culture technology has been widely applied in Brassica species nowadays.

随着芸苔属作物小孢子培养技术的日趋成熟,应用范围也越来越广泛.

The big , empty and abortive pollen grains are abserred at the stage of uninuclear microspore.

单核期的小孢子出现壁发育不良和巨大及空花粉现象.

Complete disintegration of cytoplasm of crescent or irregular shape of microspore .25.

月牙形和不规则形小孢子细胞质完全解体.

The nucleus in shrinking cytoplasm of microspore mother cell enters into telophase .17.

收缩的小孢子母细胞质中核进入减数分裂末期.

Microspore culture is an effcient method to produce haploid plant , which has been vigorously studied.

游离小孢子培养是产生单倍体的较好途径.

Establishment of high efficiency microspore culture and breeding system of Brassica napus with Yunnan natural condition

利用云南自然条件建立油菜高效小孢子培养技术及育种体系

We also listed the major problems in the research of pepper haploid breeding technology and made prospects of the potential application of anther and isolated microspore culture.

指出了目前小孢子培养研究中存在的主要问题，并对单倍体育种技术的研究和应用作了展望。

Isolated Microspore culture is one of the Methods : To obtain haploid.

摘要游离小孢子培养技术是获得大白菜单倍体植株的有效途径之一.

The endogenous hormonal ratio was interdependent to the microspore abortion of radish.

可见,萝卜小孢子的败育与内源激素平衡的破坏有关.

Abort microspore in crescent or irregular shape . 26.

月牙形和不规则形的败育小孢子.