^(60)Co-γ辐照对广宁红花油茶种子发芽及幼苗生长的影响  

Effects of ^(60)Co-γ ray irradiation on the seed germination and seedling growth of Camellia semiserrata

作　　者：易立飒[1] 李文锋[1] 崔之益[1] 奚如春[1] 

机构地区：[1]华南农业大学林学院/广东省森林植物种质创新与利用重点实验室,广东广州510642

出　　处：《华南农业大学学报》2014年第5期93-97,共5页Journal of South China Agricultural University

基　　金：广东省林业科技创新专项(2012KJCX011-02);广东省自然科学基金团队项目(9351064201000002)

摘　　要：【目的】给广宁红花油茶Camellia semiserrata辐射诱变育种提供理论和技术参考,以便进一步改良广宁红花油茶种质资源.【方法】用不同剂量的60Co-γ射线辐照广宁红花油茶干种子,对种子萌发和幼苗生长受到的影响进行研究.【结果和结论】辐照处理后种子发芽率和幼苗成活率降低,10~90 Gy的辐照剂量与幼苗死亡率呈极显著正相关,广宁红花油茶的辐射半致死剂量为47 Gy.辐照后幼苗苗高、地径生长也受到不同程度的抑制作用,并有部分幼苗产生了少量分枝,但幼苗还没有出现明显的畸形形态.Objective This study aimed to provide theoretical foundation and technical procedures of radi-ation mutation breeding for Camellia semiserrata and to improve the germplasm resource of this species .[Method]Different doses of 60 Co-γray irradiation were applied to the dry seed of this species , and the effects on seed germination and seedling growth were investigated .[Result and conclusion]Seed germina-tion rate and seedling survival rate were reduced after irradiation treatment .Extremely significant positive correlation existed between irradiation and seedling mortality in the range of 10-90 Gy dose .The half le-thal dose of radiation of the test samples was 47 Gy.The inhibition effect on seedling height and its ground diameter growth was found after different irradiations , and some seedlings produced a few bran-ches.However, no obvious deformity in the seedling morphology is found .

关 键 词：广宁红花油茶 60Co-γ辐照 诱变育种 

分 类 号：S722.35[农业科学—林木遗传育种]