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探索了谷子萌发、生长对混合盐碱胁迫的反应,初步筛选耐盐碱材料,旨在为谷子耐盐碱机制研究和耐盐碱新品种培育提供基础材料和依据。结果表明:浓度≥60mmol/L盐碱胁迫下,谷子种子发芽率较对照显著降低;芽长、根长、发芽指数、活力指数大体均随着盐碱浓度的增大而减小,浓度≥60mmol/L盐碱胁迫下与对照差异达到极显著水平,且品种间各指标差异较大;谷子芽期耐盐碱性鉴定的适宜浓度为60~100mmol/L。从20份谷子材料中初步筛选出苗期耐盐碱材料3个,中耐材料6个,敏感材料8个,高度敏感材料3个。耐盐碱的9324-8-3、坝谷214和晋谷23号3份材料中9324-8-3耐盐碱程度最高,盐碱害指数为22.38%。
This paper explored the response of millet germination and growth to mixed saline-alkali stress and preliminary screening of salt-tolerant materials to provide the basic materials and basis for the research on salt tolerance mechanism of millet and the cultivation of new salt-tolerant varieties. The results showed that the seed germination rate of millet seeds was significantly lower than that of the control under the concentration of 60 mmol / L salinity-alkali stress. The bud length, root length, germination index and vigor index decreased with the increase of salinity-alkalinity concentration, / L under saline-alkali stress, the difference between the two cultivars was significant, and the differences among the three cultivars were significant. The appropriate concentration of salt-tolerant in millet bud stage was 60-100 mmol / L. Three of the salt-tolerant materials at seedling stage, six medium-resistant materials, eight sensitive materials and three highly-sensitive materials were initially screened from 20 millet materials. The salinity-alkali resistance of 9324-8-3, Damu 214 and Jingu 23 were the highest, and the salt-alkali damage index was 22.38%.