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首页> 外文期刊>Cytology and genetics >EMS Induced Desynaptic Male Sterile Lines in Buckwheat (Fagopyrum esculentum Moench)
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EMS Induced Desynaptic Male Sterile Lines in Buckwheat (Fagopyrum esculentum Moench)

机译：EMS诱导荞麦中的突触雄性不育系（Fagopyrum esculentum Moench）

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摘要

Cytological analysis of EMS (Ethyl methane sulphonate) treated population of Fagopyrum esculentum revealed an abnormal behaviour of microsporogenesis that affected the meiotic events resulting in the formation of abnormal meiotic products that prevent the gamete formation and impair pollen fertility. The two desynaptic mutants were recorded, showing distinctive variations in the morphology as compared to the control plants. The seeds of Fagopyrum esculentum were treated with EMS solution in different concentrations such as 0.1, 0.3 and 0.5% using potassium phosphate buffer (pH 7) for 5 h. During cytological investigation, 0.5% concentration of EMS enhanced the univalent frequency per cell at diakinesis/Metaphase I, respectively along with unequal segregation at anaphase I which is pronounced to be higher in contrast to bivalents. Because of higher frequency of univalents desynapsis has been categorized as medium-strong type. EMS induced desynaptic plants showed abnormal meiotic behaviour leading to pollen sterility and no seed setting was recorded. The chemical mutagen has acted on recombination genes system which is accountable for synapsis and chiasma formation and further disrupted the complete chiasma assembly. The desynaptic mutant is a potential tool that provides genetic information on the maintenance of chiasma and the study offers the possibility for formation of aneuploids production which may be exploited successfully through chemical mutagenesis in breeding programmes.
机译：对EMS（甲烷磺酸乙酯）处理过的Fagopyrum esculentum种群的细胞学分析显示，微孢子发生的异常行为影响了减数分裂事件，导致异常减数分裂产物的形成，从而阻止了配子的形成并损害了花粉的繁殖力。记录了两个突触突变体，与对照植物相比，显示出形态上的独特变化。用磷酸钾缓冲液（pH 7）以不同浓度（如0.1％，0.3％和0.5％）的EMS溶液处理过荞麦种子5小时。在细胞学研究过程中，浓度为0.5％的EMS分别增加了在动态诊断/中期I时每个细胞的单价频率，以及后期I的不均等分离，这明显高于二价。由于单价的出现频率较高，因此去突触被归为中等强度类型。 EMS诱导的突触植物显示出异常的减数分裂行为，导致花粉不育，并且没有记录结实。化学诱变剂已经作用于重组基因系统，该系统负责突触和and裂的形成，并进一步破坏了完整的as裂组装。去突触突变体是一种潜在的工具，可提供有关维持as瘤的遗传信息，该研究为形成非整倍体产生提供了可能性，可通过化学诱变在育种计划中成功利用该非整倍体。

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