快中子辐射对泰国水稻品种Jao Hom Nin直链淀粉含量和支链淀粉结构的影响

目的]研究快中子辐射对稻米直链淀粉含量和支链淀粉结构的影响。方法]对泰国水稻栽培品种Jao Hom Nin的辐射M4代进行了直链淀粉含量和直链淀粉结构的测定与分析。结果]快中子辐射可以改变稻米的直链淀粉含量,从而获得直链淀粉含量较高的变异个体,也可以获得直链淀粉含量较低,甚至接近糯稻水平的突变后代,但是快中子辐射对稻米支链淀粉的结构基本上没有影响。结论]为利用快中子辐射筛选不同直链淀粉含量的水稻品种,以满足不同人类消费群体的食味嗜好和不同稻米制品深加工提供了参考。

Effect of Fast Neutron Irradiation on Amylose Content and Amylopectin Structure of Thailand Rice Cultivar Jao Hom Nin

Objective]The aim was to research the effect of fast neutron irradiation on amylose content and amylopectin structure。Method]The amylose content and amylopectin structure of the M4 plants of Thailand rice cultivar Jao Hom Nin irradiated with fast neutron at 13 Gy were evaluated and analyzed in this paper. Result]The results showed that amylose content of rice could be changed by fast neutron irradiation,many rice mutants with reduced amylose content and many others with enhanced amylose content even mutants with amylose content near to waxy rice could be isolated,but fast neutron irradiation almost had no effect on amylopectin structure of the samples.Conclusion]The study provided a basis for breeding rice cultivar with different amylose content in order to meat with the taste hobby of different people and the further processing of diverse rice products via the irradiation of fast neutron.