^(60)Co-γ射线辐射对大麦后代性状和β-葡聚糖含量的影响

The Effects of ^(60)Co-γ Rays Irradiation on Characters and β-glucan Content of the Progeny Barley

【目的】探讨60Co-γ射线辐射对大麦后代性状及β-葡聚糖含量的影响。【方法】采用不同剂量的60Co-γ射线辐射处理3个不同基因型大麦种子,测定其后代株高、成穗数、穗长、穗粒数及β-葡聚糖含量等性状。【结果】60Co-γ射线辐射对株高具有抑制作用,且因品种不同而存在差异;成穗数和穗长在低剂量时,既有抑制也有促进作用的应激效应,而当辐射剂量大于200Gy时,均表现为显著的抑制作用;穗粒数无显著变化;β-葡聚糖含量表现为低剂量促进高剂量抑制的变化规律,其中,甘啤7号和甘啤4号在辐射剂量为200Gy时β-葡聚糖含量最大,XANAOU在100Gy时最大。【结论】60Co-γ射线辐射剂量为200Gy左右时,能有效改良大麦部分性状尤其是β-葡聚糖含量。

【Objective】To explore the effect of60Co- γ rays irradiation on characters and β- glucan content of the different progeny barley. 【Method】60Co- γ rays irradiation of different doses were used to treat3 different genotypes of barley and measure the ear number,plant height,spike length,spike grain number and β- glucan content on descendants of radiation processing of barley.【Result】60Co- γ rays irradiation had inhibitory effect on plant height,but because of the variety the inhibition degree would be different; The spike number and length in the low doses exhibited both inhibition and promoting stress effect,and when the radiation dose was greater than 200 Gy,significant inhibitory effect was shown; No significant change was found in spike grain number; Low doses of beta glucan content showed that the low dose promoted the high dose inhibition,among which,Ganpi No. 7 and No. 4 when the radiation dose content was 200 Gy,β- glucan content reached the highest and XANAOU was at the peak when the radiation dose content was 100 Gy.【Conclusion】The60Co- γ rays radiation could effectively improve most barley properties especially when the β- glucan content was within about 200 Gy.