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【目的】通过对水稻幼苗期耐碱性筛选,为水稻苗期耐盐碱筛选和耐盐碱育种工作提供理论参考。【方法】以浓度为40 mmol/L Na2CO3+Na HCO3对121份水稻材料进行幼苗期耐碱能力的筛选。【结果】结果表明,水稻幼苗期相对抑制率根长>根数>芽长的趋势,但根长相对抑制率的绝对数值差异小于芽长与根数;强耐碱类型的79份材料中芽长有28份,根长有12份,根数有41份材料优于长白9号;其中13G028幼苗期耐碱能力最强,13G145次之,其次为13G031,其根长、根数、芽长相对抑制率均小于长白9号。【结论】自育品系13G028、13G031和13G145可作为耐碱亲本材料应用。
【Objective】 The objective of this study was to provide a theoretical reference for the selection of saline-alkali resistance and salt-tolerant breeding in rice seedling stage. 【Method】 121 rice lines were screened for their alkali tolerance at a concentration of 40 mmol / L Na2CO3 + Na HCO3. 【Result】 The results showed that there was a trend of relative root restraint root length> root number> bud length at seedling stage of rice, but the absolute value of root length relative inhibition rate was less than that of shoot length and root number; There were 28 long and 12 long roots and 41 were better than Changbai 9. Among them, 13G028 had the strongest alkali resistance at 13G145, followed by 13G031, followed by its root length, root number and shoot length The relative inhibition rate is less than Changbai 9. 【Conclusion】 The self-breeding lines 13G028, 13G031 and 13G145 can be used as alkali-tolerant parent materials.