首例航天诱变玉米雄性不育突变体的遗传分析

将卫星搭载处理后代所得到的玉米雄性不育材料，在不同地点、不同年份、不同季节进行种植观察；从田间和室内对育性表现的稳定性进行鉴定。通过正交和反交对不育株的所属类型进行分析，结合自交、回交分析其遗传特点。结果表明，该不育材料的雄穗无任何花药外露，花药内无花粉粒，败育彻底，育性表现稳定，是一个由隐性单基因控制的可遗传的“无花粉型”核不育。

Genetic Analysis about Maize Male Sterile Mutant Obtained by Space Flight

The seeds of maize single hybrid Chuandan No.9 were carried into space in 1996 by satellite.After the seeds were planted in field in comparison with travel in space seeds which was not carried into space.Fortunately,male sterile plants were discovered in one of the ear rows.The stability of male sterile expression was observed in different years,different locations and different generations.In order to analysis the genetic characteristic of male sterility,test cross,sister cross,back cross,reciprocal cross and self pollination were conducted with these male sterile plants.The result showed that the male sterility was stable in different years and different locations,it is inheritable from generation to generation.The sterility is controlled by a single nuclear recessive gene.The appearance of male sterile mutant is the conclusion of gene mutation which happened in nuclear by space flight.This mutant material always accompanies with lower plant height.