^(60)Co-γ射线辐照澳洲坚果种子后的苗期辐射效应  

The Radiation Effects of ^(60)Co-γ Rays Irradiation on Macadamia Seeds at Seedings Stage

作　　者：孔广红[1] 倪书邦[1] 贺熙勇[1] 柳觐[1] 

机构地区：[1]云南省热带作物科学研究所,云南景洪666100

出　　处：《核农学报》2018年第3期417-423,共7页Journal of Nuclear Agricultural Sciences

基　　金：云南省热带作物科技创新体系建设项目(RF2016-6;RF2017-7);云南省科研院所技术开发研究专项(2012CF014)

摘　　要：为探明^(60)Co-γ射线辐照对不同澳洲坚果品种种子的辐射效应,以经^(60)Co-γ射线辐照的4个澳洲坚果品种的种子萌发生长而成的苗木为试验材料,研究不同辐照剂量(0、40、100、200 Gy)对澳洲坚果不同品种辐照处理群体的辐射效应。结果表明,随着辐照剂量的增加,云澳57、云澳51、云澳58 3个品种的地径年均增长量均受到抑制,云澳41群体的地径年均增长量呈上升趋势;与对照群体(CK)相比,辐照处理增大了辐照群体地径的变异系数,增大了辐照群体内地径的最大值和最小值及其极差,使株间变异更加丰富;通过比较澳洲坚果不同品种辐照群体与CK开花株数百分率和结实株数百分率,从云澳58和云澳41的辐照群体中筛选出4株性状优良的突变单株。本研究结果为今后利用^(60)Co-γ射线辐照诱变技术培育高产优质的澳洲坚果新品种提供了理论依据。To study the radiation effects of ^（60）Co-γ rays irradiation on Macadamia seeds. The seeds of four Macadamia cultivars were irradiated by different doses（ 0、40、100、200 Gy） of ^（60）Co-γ rays,and then the effects of irradiation on mutation populations were investigated. Results showed that the average extending of diameter per annum of three cultivars（ Yunao 57,Yunao 51,Yunao 58） was inhibited with irradiation dose increase. However,there was a little promotion on the average extending of diameter per annum of Yunao 41. Compared with CK populations,the coefficient of variation in mutation populations are larger as well as the maximum value,minimum value and the range,enriched the diversity among plants. Based on the percentage about the number of flowering and the number of fruiting between mutation populations and CK populations,4 mutants with good traits were selected. It provides evidence that the mutation breeding could be used for new variety selection of Macadamia with high-yield and high-quality.

关 键 词：澳洲坚果 60Co-γ射线 辐照群体 辐射效应 

分 类 号：S664.9[农业科学—果树学]