离子注入后同源四倍体水稻双胚苗突变性状的表达特点

Charachers expression on autotetraploid rice with twin-embryo seedling via ion beam implantation

氮离子注入后在同源四倍体水稻的后代群体内筛选到1株具有双胚苗特征的突变单株.在多个世代的筛选、纯化和鉴定过程中对其多胚苗性状的表现特点进行了观察鉴定.玉米诱发的同源四倍体双胚苗材料在其性状表达特征、性状表达频率和性状表达的条件等方面均显现出一定的特异性.在试验材料的群体内双胚苗发生频率因材料种类不同或发芽温度条件不同而表现出一定的差异性.种子经过去颖壳处理后可以使其双胚苗频率提高32.4%～36.0%.在同源四倍体双胚苗材料中,其苗位特征表现出明显的多样性.

The 1 mutant with twin-embryo was selected in M2 of autotetraploid rice implanted by N+ ion beam.The characters of the poly-embryo seedlings were studied in variant generations,gaining some mutants with the stable properties.The two lines of the mutants in M6 were used as the materials,studying their rate of poly-embryo seedlings in different temperatures.The results showed that the effects of ion beam implantation technique were very obvious in genetic improvement of autotetraploid rice,promoting to obtain...