三种化学诱变剂对不同水稻品种的生物学效应研究

采用EMS、NaN3和MUN等3种不同化学诱变剂,分别对明恢63、R259和湘晚籼13号等3个不同晚稻水稻品种进行了不同浓度的浸种诱变处理,分析测定了不同水稻品种的发芽率、发芽势、出苗率、成苗率、株高以及根系性状。研究结果表明:不同化学诱变剂对不同水稻品种的M1各性状均存在普遍的抑制作用,明恢63在株高性状上对化学诱变剂处理具有较强的抗胁迫能力,在全部或大部分生长期内的株高均高于对照处理和低浓度处理。通过对各处理的成苗率的调查,找出最佳处理浓度。结果表明,1.0%EMS、1.0X10-3mol/LNaN3和0.05%MNU分别为该3种不同诱变剂处理水稻种子的最适剂量浓度。

Studies on Biological Effects of the Different Rice Cultivars by Three Chemical Mutagens

The wet seeds of late rice cultivars Minghui 63,R259 ,Xiang Zao Xian 13 were treated by three different Chemical mutagens EMS,NaN3 and MUN with different concentrations to induce mutations.Germination potential and germination rate,seedling emergence and seedling establishment rate,plant height and root characters of the induced M1 generation were measured and analyzed.The results showed that the inhibitory effects generally existed in the M1 generation,Minghui 63 presented stronger ability of stress resistance to Chemical mutagens treatment on plant height character,high concentration treatment of Minghui 63 was higher than CK and low concentration treatment during all or most growth period.By surveying seedling establishment rate to find the optimum treatment concentrations.The results demonstrated that 1.0%EMS,1.0X10-3mol/LNaN3 and 0.05%MNU were the best suitable concentrations of EMS,NaN3 and MUN to induce the different rice cultivars.