In order to breed saline-alkaline tolerant rice variety ,40 j aponica rice cultivars of different saline-al-kaline tolerance ,which were mainly planted in the northeastern three provinces ,were taken as test materials to conduct screening test with three saline-alkaline treatments at the germination stage which the concentration of NaHCO3 were 25 、50 、75 mmol・L-1 .The results indicated that under the same saline-alkaline treatment ,the a-bility of saline-alkaline tolerance was different among different rice cultivars ;under the different saline-alkaline treatments ,with the increasing of concentration of NaHCO 3 ,the germination percentage ,bud length ,root num-ber ,root length and dry weight of different rice varieties showed downward trend .Through the screening test , five stronger saline-alkaline resistant rice varieties (lines) were selected ,which were Changbai No .10 ,Tong88-7 ,Nongda No .3 ,Fuyuan No .4 and Tong 318 .% 为选育耐盐碱水稻品种，以东北三省耐盐碱性不同的40份粳稻为试验材料，在3个盐碱胁迫处理(25、50、75 mmol・L-1 NaHCO3)下进行芽期耐盐碱性筛选试验。结果表明：在同一盐碱胁迫处理下，不同水稻品种间表现耐盐碱程度不同；在不同盐碱胁迫处理下，随着盐碱处理浓度的增加，不同水稻品种的发芽率、芽长、根数、根长、干重呈下降趋势。通过试验筛选出长白10号、通88-7、农大3号、富源4号和通育318共5个耐盐碱性较强的水稻品种(系)。
展开▼
