【摘要】 观察和统计了9个五倍体杂种花粉母细胞减数分裂过程几个主要时期异常程度的多个指标,并比较分析了四类五倍体杂种减数分裂异常程度的差异.结果表明,杂种黄化对减数分裂异常无显著影响;不同杂种减数分裂异常程度上的差异主要表现在末期Ⅰ和末期Ⅱ,而且这种差异是由特定亲本所决定;Khapli作亲本可使末期Ⅰ显著正常化,但这种效应未能在类似于有丝分裂的末期Ⅱ表现出来.其中一个杂种具有特殊机制,可使末期Ⅰ和末期Ⅱ都高度正常化.最后,作者对减数分裂异常程度的若干指标和减数分裂正常化的原因进行了讨论.更多还原

【Abstract】 Through observation and statistcs of many indexes on abnormality at main stages of meiosis of nine Pentaploid hybrids, and comparative analysis of difference of meiosis abnormality among four groups of Pentaploid hybrids, the result suggested that: hybrid chlorosis had not an obvious effect on meiosis abnormality, the difference of meiosis abnormality amons, vatious hybrids largely appeared at meiosis T I and TⅡ, and the difference decided by specific parent. Khapli as a parent had an obviously normalizing effect on abnormality at meiosis TI , but this effect disappeated at meiosis TⅡ being similar to mitosis. Of all, one hybrid maybe have a special mechanism which may make meiosis both TI and TⅡ highly normalized In addition, any indexes on meiosis abnormality and reasons of meiosis normalization were discussed.更多还原