快中子辐射百日草当代的生物学效应  

Mutagenic Effect of Zinnia elegans Jacq.Induced by Fast Neutron

作　　者：李多芳[1] 董亚净 耿金鹏[1] 曹天光[1] 田安然 展永[1] 

机构地区：[1]河北工业大学生物物理研究所,天津300401

出　　处：《北方园艺》2015年第12期58-62,共5页Northern Horticulture

基　　金：河北省自然科学基金资助项目(C2013202192);航天育种迁安基地建设资助项目(607023)

摘　　要：以百日草为试材,采用14MeV的单能快中子辐照百日草干种子,研究了不同剂量快中子辐射对当代百日草种子的萌发及幼苗的生长状况的影响。结果表明:各辐射剂量处理组的百日草种子发芽率和幼苗株高与对照相比无显著性变化;在表型性状的观察中,辐射后的百日草叶片和花部性状均发生较明显变异,其中叶子变异性状在植株生长过程中逐渐恢复,而花型花色的变异性状基本稳定;百日草病害调查结果显示中子辐射处理后的幼苗感染黑斑病的比率明显减低。综上所述,中子辐射技术对百日草品种改良是可行的。中子辐照百日草生物性状的研究为培育优良花卉新品种提供了重要的参考和依据。Taking dry seeds of Zinnia elegans Jacq. as test material,they were irradiated by fast neutron with energy 14 MeV,the effect of different doses of fast neutrons radiation on seed germination and seedling growth of Zinnia elegans Jacq. were investigated. The results showed that compared with the control plants,Zinnia elegans Jacq. plants radiated by fast neutron had no significant differences on germination rate and seedling height. In the observation about plant traits, leafs and flowers of irradiated Zinnia elegans Jacq. plants occurred obvious variations, of which the variations on leafs could be repaired gradually in plant growth process, while that on flowers were basically stable. The disease survey results suggested that the infection rate of black spot disease of Zinnia elegans Jacq. plants radiated by fast neutron was obviously lower than control plants. In conclusion, neutron radiation technology was feasible for improvement of Zinnia elegans Jacq. varieties. The studies on the mutagenic effect of neutron radiation on biological traits of Zinnia elegans Jacq. provided an important reference and basis for flower breeding.

关 键 词：快中子 诱变效应 百日草 变异性状 

分 类 号：Q691[生物学—生物物理学]