摘要
为探讨空间环境对水稻诱变育种的影响，用返回式卫星搭载水稻干种子，回收返地种植，考察后代的性状表现及遗传与变异情况。结果表明：ＳＰ１代与对照差异不明显；ＳＰ２代群体的单株间９个主要农艺、经济性状出现了强烈的广谱分离，变异频率高达４．６６％；ＳＰ３代单株与ＳＰ４代５个主要性状平均值的相关分析，具有极显著的相关性；ＳＰ４代开始出现稳定株系；ＳＰ５代、ＳＰ６代先后进入品系比较试验、品种区域试验，或示范种植推广。水稻干种子在空间条件下所产生的变异，能稳定地遗传于后代，可以作为一种新的诱变育种方法加以开发利用。
Rice seeds were carried into space by the recoverable satellite. After recovery the seeds were sowed on the earth so as to observe the character performance and genetic variation of their later generations.The preliminary results showed that the main characters of the SP 1 generation didn't show significant difference from the control.Among the individual plants of the SP 2 generation strong broad-spectrum segregation appeared in the 9 main agronomic characters. Mutation frequency is 4.66%. The individual plants of the SP 3 generation were obviously correlated with the SP 4 generation in the average character values of the 5 main characters.Stable plant strains were obtained in the SP 4 generation.The SP 5 and SP 6 generations were put into control and polt tests.As a conclusion,it may be considered that certain variations of rice seeds induced by the space conditions are heritable to the offsprings,therefore,it can be used as a new method for mutagenic seed breeding.
出处
《航天医学与医学工程》
CAS
CSCD
1998年第1期21-25,共5页
Space Medicine & Medical Engineering
关键词
空间环境
诱变育种
水稻
种子
变异性
space environment muatien breeding paddy seeds mutation breeding heredity variation
