高粱(Sorghum bicolorL.Moench)质核互作雄性不育有7种类型,即A1,A2,A3,A4,A5,A6和9E。以A2/B2V4为材料,对A2类型的雄性不育系进行了研究,结果表明:高粱A2V4 CMS花粉母细胞减数分裂染色体行为,在前期Ⅰ至中期Ⅰ无任何异常现象,从后期Ⅰ开始,染色体行为出现各种异常现象,如同源染色体在走向两极时出现滞后或部分不分离;或在后期Ⅱ姐妹染色体不分离造成细胞内染色体多倍化,以致形成两极染色体数目不等;在一个细胞内有几个染色体团或核;三分体及“T”型和直线型排列的四分体。所有这些异常现象最终导致减数分裂不能正常进行,不能发育正常的小孢子,因而造成雄性不育。 There are seven types of sorghum (Sorghum bicolor L.Moench) male sterility, A1, A2, A3, A4, A5, A6 and 9E. A2 / B2V4 was used as the material to study A2 type male sterile lines. The results showed that there was no abnormal phenomenon in meiosis chromosome A2A4V pollen mother cells from early stage Ⅰ to middle stage Ⅰ, Chromosome behavior appear all kinds of anomalies, such as homologous chromosomes in the direction of the poles appear lagging or not part of the separation; or in the latter part of the sister chromosome does not cause intracellular segregation of chromosomes, resulting in bipolar chromosomes ranging from the number; within a cell There are a few chromosomal clusters or nuclei; trisomy and “T” type and linear arrangement of the tetrad. All of these anomalies eventually lead to meiosis can not be normal, can not develop normal microspores, resulting in male infertility.