论文部分内容阅读
【目的】通过水稻幼苗期耐盐性的比较,为寒地水稻耐盐资源筛选及育种提供参考。【方法】以123份苗期耐盐碱粳稻品种(系)为试验材料,以蒸馏水为对照,进行苗期150 mmol/L Na Cl处理,测量其芽长、根长和根数等指标,并对比分析各指标相对抑制率。【结果】盐胁迫下水稻幼苗芽长、根长与根数均极显著下降(P<0.01,下同),相对抑制率表现为根长>芽长>根数。参试材料可分为强耐盐类型、中耐盐类型和弱耐盐类型,其中强耐盐类型芽长和根数抑制率极显著低于中耐盐和弱耐盐类型,而根长抑制率与其他类型无显著差异(P>0.05)。强耐盐材料中品系13G143芽长、根长和根数相对抑制率较低,分别为11.89%、25.36%和10.08%,均低于对照长白9号。【结论】150mmol/L Na Cl胁迫下,水稻品系13G143耐盐碱能力较强,可作为水稻幼苗期耐盐亲本材料应用。
【Objective】 Salt tolerance in rice seedling stage was compared to provide reference for salt-tolerant resources screening and breeding in cold region. 【Method】 Two hundred and three salt-tolerant japonica rice varieties (lines) at seedling stage were used as experimental materials. 150 mmol / L NaCl was used as control to treat the disease, and the shoot length, root length and root number were measured. Comparative analysis of the relative inhibition rate of each index. 【Result】 The results showed that under salt stress, the shoot length, root length and root number of rice seedlings all decreased significantly (P <0.01, the same below). The relative inhibition rate was root length> shoot length> root number. The tested materials can be divided into two types: strong salt tolerant type, medium salt tolerant type and weak salt tolerant type. Among the strong salt tolerant types, the bud length and the root inhibitory rate were significantly lower than those of medium salt tolerant and weak salt tolerant, Rate and no significant difference between other types (P> 0.05). Strong salt-tolerant materials line 13G143 bud length, root length and root relative inhibition rate was low, respectively 11.89%, 25.36% and 10.08%, were lower than the control Changbai 9. 【Conclusion】 Under the stress of 150 mmol / L NaCl, 13G143 of rice line has strong salt-tolerance ability and can be used as salt tolerant parent material in rice seedling stage.