It was suggested by pollen fertility analysis and chromosome behavior observation that seedless mutant in level of diploid was caused by non\|snapsis of monoploid chromosomes and pollen ster...

• 对该变异枝系的花粉育性和染色体行为观察结果表明 :辐射诱发染色体变异 ,分裂不正常 ,导致花粉和胚胎败育 ,产生二倍体水平的无核突变。