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abnormal meiosis
相关语句
  减数分裂异常
     The result obtained from the analysis of statistics is as follows:1. There are significant differences in the percentage of abnormal meiosis among F1-F5 hybrids (P<0. 01).
     对观察资料进行的统计分析表明:(1)杂种在F_1~F_5代间的减数分裂异常率的差异极显著(P<0.01);
短句来源
     3. There are significant negative correlations between the percentage of abnormal meiosis and the numbers of self-generation or the fertility of pollen ( r =- 0. 9327; r =- 0. 9352). There is significant direct correlation between the fertility of pollen and the percentage of seed set (r =0.8802).
     (3)减数分裂异常率与自交代数、花粉育性之间呈强负相关(r=-0.9327;r=-0.9352),花粉育性与结实率之间呈强正相关(r=0.8802)。
短句来源
     Meiotic index of above ms lines ranged from 17.5% to 57.3%, indicating abnormal meiosis of PMC.
     五种不育系的减数分裂指数为17.5—57.3%,说明减数分裂异常
短句来源
     It was thought that space induction caused the variation of size, fertility and the abnormal meiosis.
     分析认为花粉的大小差异和花粉的育性与减数分裂异常有关 ,而这些现象都是航天诱变造成的
短句来源
     Abnormal meiosis of pollen mother cells and deferred de-generation of tapetum cells are the chief causes of abortive pollen.
     减数分裂异常和绒毡层细胞延迟退化是导致花粉败育的主要因素。
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  “abnormal meiosis”译为未确定词的双语例句
     (4) Frequency of change in this three period is opposite to fertility restoration of their F 2,the abnormal meiosis was one of the important reason that the fertility restoration of 1B/1R CMS lines was low and easy to change.
     ( 4 )粘型 1 B/1 R不育系杂交 F2 单株减数分裂 3个时期染色体行为变异率与其恢复度成反比 ,这类不育系减数分裂中染色体行为不同步是其恢复度不高且变异较大的一重要原因。
短句来源
     (3) The affect of Ae. kotschyi cytoplasm on non-1B/1R CMS lines is not obvious,the interacts of special 1B/1R nuclei and Ae. kotschyi cytoplasm was the reason of abnormal meiosis.
     ( 3)粘果山羊草细胞质对非 1 B/1 R不育系减数分裂过程影响不大 ,5个 1 B/1 R不育系减数分裂过程中 ,3个时期染色体行为变异率的差异是特定的 1 B/1 R核型与粘果山羊草细胞质互作的结果 ;
短句来源
     Generating ways of empty grain pollen are: ① abnormal meiosis of pollen mother cell.
     导致空粒花粉产生的主要途径:①花粉母细胞减数分裂不正常;
短句来源
     The decrease of rertility of Jiaogan [Citrus reticulata var.tankan(Hayata) H.H.Hu] was Preliminarily demonstrated to be due the abnormal meiosis during gametogenesis producing sterile gametes. In addition,that chromosomes in Jiaogan indicated by karyotype analys is were to be more unsymmetrical than those in mandarin and sweet orange implied the possibility of the occurrence of some chromosome translocations in Jiaogan over its long course of cultivation and evolution.
     蕉柑Jiaogan[Citrusreticulatavar.tankan(Hayata)H.H.Hu]育性下降的直接原因是配子发生过程中减数分裂不正常,造成配子不育.通过核型分析得知,蕉柑的染色体不对称性大于桔类和甜橙,说明蕉柑在长期的栽培演化过程中,可能发生了某些染色体节段的易位.
短句来源
     Observations on abnormal meiosis of pollen mother cells in Lilium davidii var.unicolor
     兰州百合小孢子母细胞减数分裂异常现象的观察
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  相似匹配句对
     Abnormal meiosis also was observed.
     还观察到花粉母细胞异常减数分裂现象。
短句来源
     AN ABNORMAL PHENOMENON OF MEIOSIS IN BANANA
     香蕉减数分裂中的一种异常现象
短句来源
     The EKG were abnormal.
     心电图(EKG)表现异常;
短句来源
     Abnormal Climate
     气候乱象
短句来源
     Meiosis behaviors of D.
     对菊花脑D.
短句来源
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  abnormal meiosis
The characteristics of this abnormal meiosis and its evolutionary and cytotaxonomic significance are discussed.
      
It is explained that apomixis results from the combination of abnormal meiosis, abnormal fertilization and parthenogenesis.
      
Normal and abnormal meiosis in a partially male-sterile sugar-beet (Beta vulgaris L.)
      
The sporophytic plants originated from spores were estimated to be haploid, and the estimation was supported by abnormal meiosis in sporocytes and the absence of mature spores, but some chromosomes (n=58) formed bivalents in the meiotic process.
      
In the former case the 16 SMCs usually underwent abnormal meiosis to give rise to some 50 spores, some of which were regular-shaped; in the latter the eight SMCs multiplied into 32 spores by normal meiosis.
      
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Five isonuclear alloplasmic male sterile line with ChangBai 6 as nuclear donor and with WA, G, T, HL, B-T as cytoplasm, were cytologically identified. The main meiotic chromosomal aberration of PMC are multipolar division, loose pairing, inversion, tetravalent, interlocking chromosome, unequal segregation, straggling chromosome, bridge and laggards. Meiotic index of above ms lines ranged from 17.5% to 57.3%, indicating abnormal meiosis of PMC. A wide range of pollen abortion in microsporegenesis were found,...

Five isonuclear alloplasmic male sterile line with ChangBai 6 as nuclear donor and with WA, G, T, HL, B-T as cytoplasm, were cytologically identified. The main meiotic chromosomal aberration of PMC are multipolar division, loose pairing, inversion, tetravalent, interlocking chromosome, unequal segregation, straggling chromosome, bridge and laggards. Meiotic index of above ms lines ranged from 17.5% to 57.3%, indicating abnormal meiosis of PMC. A wide range of pollen abortion in microsporegenesis were found, such as shrinken pollen, sticky pollen, pollen breakdown, giant nuclear pollen, multipoler pollen, vacuolated pollen and pollen unstainable by KI-I. The results support the classification of male sterile cytoplasm by Chu(1984).

对以长白六号为细胞核,“野败”、“冈”、“红莲”、“滇”、“B-T”为细胞质的五种同核异质不育系作了细胞学比较。上述不育系花粉母细胞减数分裂的染色体畸变是:多极分裂、疏松配对、倒位、四价体、互锁染色体、不等分离、拖曳、桥、落后等;五种不育系的减数分裂指数为17.5—57.3%,说明减数分裂异常。小孢子发育过程出现程度不等的败育现象,表现为花粉皱缩、粘连、花粉溶解、巨核花粉、多萌发孔花粉、液泡化花粉,及KI-I染色异常。研究结果支持褚圻对现有不育系的分类。

Compared with normal development, a embryological study has been systematically made on empty-bur of Chinese chestnut. The study reveals that the empty-bur may result from different causes as follows. Stagnancy of macrosporocyte, abnormal meiosis, unusual structure of embryo sac, disintegration of egg and synergid, unsuccessful pollination and fertilization, proembryo decaying at its early stage, degenerated endosperm and not-well-developed cotyledon.There is a certain relationship beetween the size of...

Compared with normal development, a embryological study has been systematically made on empty-bur of Chinese chestnut. The study reveals that the empty-bur may result from different causes as follows. Stagnancy of macrosporocyte, abnormal meiosis, unusual structure of embryo sac, disintegration of egg and synergid, unsuccessful pollination and fertilization, proembryo decaying at its early stage, degenerated endosperm and not-well-developed cotyledon.There is a certain relationship beetween the size of general-involucre and ovary and the stage of ovule developing. At spherical prombryo stage normal development ovule showing much difference from degnerated one, therefore whether normal ovule is growing in ovary can be distinguished

选连续三年发生空苞率达90%的树为材科,对其胚眙发育进程进行了观察,并与连续三年不发生空苞树作比较。结果表明:板栗空苞发生的原因在胚胎学上有如下几方面,大孢子母细胞发育停止,减数分裂不能正常进行;成熟胚囊结构异常,卵细胞、助细胞解体;传粉受精不良导致受精作用异常;原胚早期敗育、胚乳败育、胚发育中止及部分空苞中种子的子叶不发育等?鄄熘谢狗⑾?总苞及子房外形的大小与胚珠发育进程之间有密切关系;另在珠形胚时期,一个子房内发育胚珠与退化胚珠在外形大小上也有明显差別。

A natural mutation of Jincheng (Citrus sinensis Osbeck), Meishan seedless Jincheng, was selected from commercial orchard of Jincheng on tangerine(C. reticulata Blanco)rootstock in Meishan county, Sichuan province. The observation and examination on the horticultural and genetic characters in 1986-1989 showed that the seedless character of this selection remains stable with superiority over that of Jincheng, the yield and mature period are similar to Jincheng. The results also indicated that self-incompatibility...

A natural mutation of Jincheng (Citrus sinensis Osbeck), Meishan seedless Jincheng, was selected from commercial orchard of Jincheng on tangerine(C. reticulata Blanco)rootstock in Meishan county, Sichuan province. The observation and examination on the horticultural and genetic characters in 1986-1989 showed that the seedless character of this selection remains stable with superiority over that of Jincheng, the yield and mature period are similar to Jincheng. The results also indicated that self-incompatibility is the main cause of the absence of seeds. According to the abnormal meiosis of pollen mother cell and different isozymogram from Jincheng, it is considered the variance of genetic material indeedly occured in this selection.

眉山无核锦橙是从四川眉山县一红桔砧锦橙生产园中选出的自然突变体,经1986~1989年观测,其无核性状稳定,单果平均种子数0.03~0.15粒,其他品质指标略优于普通锦橙,成熟期和产量与普通锦橙相近。初步明确自交不亲和是其无核的主要原因,根据其花粉母细胞减数分裂紊乱、同工酶谱与普通锦橙不同,认为确系遗传物质发生突变。

 
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