摘要:选用16份玉米自交系，采用NaCl胁迫处理，测定萌发期和幼苗期的相关生长与生理指标，对盐害指数进行聚类分析和耐盐性综合评价。结果表明，盐胁迫下，不同玉米自交系萌发期的发芽势、发芽率、胚根长、胚芽长、胚芽鲜重、胚根鲜重均呈下降趋势，幼苗期的MDA含量和相对电导率上升，相对含水量下降。87-1、8723和78599-1属于高耐盐性自交系；LX9801、TS141、A413、137、81162等属于中等耐盐自交系； 廊黄、昌7-2、478和成687属于耐盐性自交系；9046和65232属于敏感性自交系；543和136属于高敏感自交系。

关键词:玉米自交系  萌发期  幼苗期  耐盐性  综合评价

AbstractIn this study, 16 maize inbred lines were employed to determine growth parameters at germination and seedling stage under stress. The results indicated that germination potential, germination rate, root length, shoot length, root fresh weight, shoot fresh weight decreased at germination stage, and the relative conductivity, malondialdehyde(MDA) increased, but relative water content decreased at seedling stage in different maize inbred lines under 180 mmol·L^-1 NaCl stress. Finally, we screened high salt-tolerant inbred line 87-1,8723 and 78599-1, medium salt-tolerant lines LX9801, TS141, A413,137 and 81162, salt-tolerant inbred lines Langhuang, Chang7-2,478 and Cheng687, salt-sensitive inbred line 9046 and 65232, and high salt-sensitive inbred line 543 and 136.

Key wordsmaize inbred line  germination stage  seedlings stage  salt tolerance  comprehensive evaluation

文章编号： 0258_7106 (2016) 01_0018_15 中图分类号： P618.41 文献标志码：A

改回日期：2015_07_11

基金项目

**通讯作者耿新霞， 女， 1979年生， 助理研究员， 成矿规律研究方向。 Email： gen gxinxia@cags.ac.cn