香稻品种盐粳939^(60)Co诱变M_(2)代品质性状变异分析

Variation Analysis of Quality Traits of Fragrant Rice Yanjing 939 M_(2)Generation by^(60)Co

为研究辐射香稻品种后代品质性状的变异情况,以^(60)Co-γ射线辐射处理香稻品种盐粳939种子获得的M_(2)代群体为研究材料,对其香味性状、外观品质性状、淀粉RVA谱特征值进行分析。结果表明,在盐粳939的M_(2)代群体中香型株系达到64.5%,香型株系外观品质性状、淀粉RVA谱特征值的Shannon-Wiener多样性指数在0.773~2.045,突变频率2.80%~28.04%。与对照品种相比垩白粒率、垩白度有变好趋势,峰值粘度、崩解值、有下降的倾向。M_(2)代群体中香型株系在外观品质性状、淀粉RVA谱特征值上形成不同于原品种的类群。本研究结果为辐射诱变香稻品种的品质诱变效应提供参考依据。

To study the variation of quality traits of offspring of irradiated fragrant rice varieties,the M_(2) generation population obtained by^(60)Co-γray irradiation treatment of the fragrant rice variety Yanjing 939 was used as the research material,and the fragrant traits,appearance quality traits and starch RVA profile properties were analyzed.The results showed that the Shannon-Wiener diversity index of the fragrant lines of the M_(2) generation of Yanjing 939 reached 64.5%,the Shannon-Wiener diversity index of the appearance quality traits and the RVA profile properties of the fragrant lines ranged from 0.773 to 2.045,and the mutation frequency was between 2.80%and 28.04%.The chalky rice rate,rice chalkiness had a good trend,peak viscosity,breakdown value had a tendency to decline.The fragrant lines in the M_(2) generation group formed a group different from the original cultivar in the appearance quality traits and starch RVA profile properties.The results of this study provide a reference for the quality mutagenic effects of radiation-induced mutant rice varieties.