【摘要】 以“纸核”东镇红芒为材料,采用改良的染色和制片方法,首次系统地对芒果花粉母细胞减数分裂进行研究。结果表明,①芒果染色体数目为2n=40,芒果减数分裂属于同时型胞质分裂,终变期为观测染色体数目的最佳时期;②终变期发现多倍体,后期Ⅱ出现分裂不同步现象;③低温阴雨气候是造成“纸核”东镇红芒花粉母细胞减数分裂异常的原因;④从细胞遗传学水平上分析了芒果“纸核”与花粉母细胞减数分裂异常的关系。更多还原

【Abstract】 Seedless Mango(Mangifera indica cv.Dongzhen Hongmang) was used to study its flowering behavior and meiosis of pollen mother cells with modified staining and chromosome preparing methods.The results were as follows.The chromosome number of mango is 40 and the meiosis in pollen mother cell is simultaneous cytokinesis;Monovalents is the optical period to study chromosome number;Polyploids are observed in monvovalents and cell’s nonsynchronous division is observed in anaphase Ⅱ;Low temperature and rainy days probably gave an impulse to the polyploid and cell’s nonsynchronous division;The relationship between abnormal circumstances in meiosis of pollen mother cells and seedless mango were studied on cytogenetics level.更多还原