关键词: 水稻, 幼苗期, 碱胁迫

Abstract: [Objective] Alkali-resisting rice is scarce now, salt injury happens easily in seeding stage, this research is to offer a reference for selecting alkali-resisting rice in cold zone in seeding stage through selecting alkali-resisting rice resources. [Method] This research conducted the early seedling stage treatment of 121 materials by using a mixed alkali of concentration 40 mmol/L Na₂CO₃+NaHCO₃ in rice. [Result] The relative inhibition rate of rice early seedling was in follow order:root length > root number > bud length. However, the difference of absolute value of relative inhibition of root length is less than bud length and root numbers. Of the 79 high alkali tolerance materials, 28 bud length, 12 root length and 41 root number were better than that of Changbai 9 and the best one was 13G028, the next one was 13G14, the third one was 13G031 that the relative inhibition rate of root length, root number and bud length were less than Changbai 9. [Conclusion] 13G028, 13G031 and 13G145 bred by our team could be regarded as saline tolerance parent materials.

Key words: rice, seedling stage, alkaline stress