干旱地区农业研究2018，Vol.36Issue(1)：140-147,8.DOI:10.7606/j.issn.1000-7601.2018.01.22
不同基因型玉米杂交种大喇叭口期的耐盐性
Salt tolerance of different genotypes maize at the big flare stage
摘要
Abstract
In order to evaluate salt tolerance of different maize genotypes,25 varieties/lines were planted in saline-alkali land subjected to salt stress in northern Ningxia,Yinchuan,with the soil salt contents being 2.337,3.044 g·kg-1and 6.935 g·kg-1).Based on phenotypes and physiological indexes measured at big flare stage,salt tolerance of the 25 maize genotypes were evaluated through principal component analysis and the subordinate function method.The results showed that plant height,stem diameter,relative chlorophyll content(SPAD values)were significantly decreased with the increase of salt stress.At mild stress(the soil salt content was 2.337 g·kg-1),there was a significant positive correlation between plant height,stem diameter and SPAD.Under severe stress(the soil salt content was 6.935 g·kg-1),there was a significant positive correlation between stem diameter,SPAD values and canopy temperature,and canopy temperature had a significantly negative correlation with superoxide dismutase(SOD).Membrane permeability and SOD were extremely significant positive correlated,and other agronomic traits and physiological indexes were not sig-nificantly correlated.According to comprehensive evaluation,the salt tolerance of maize varieties was divided into highly salt tolerant,salt tolerant,salt susceptible and highly salt susceptible.关键词
玉米/大喇叭口期/种质资源/耐盐性/综合评价Key words
maize/bell stage/germplasm resources/salt tolerance/comprehensive evaluation分类
农业科技引用本文复制引用
张会丽,袁闯,许兴,朱林,朱志明,高雪..不同基因型玉米杂交种大喇叭口期的耐盐性[J].干旱地区农业研究,2018,36(1):140-147,8.基金项目
宁夏回族自治区牧草育种专项(2014NYYZ040101) （2014NYYZ040101）
宁夏自然科学基金项目(NZ1617) （NZ1617）
宁夏高等学校科学研究项目(NGY2015030) （NGY2015030）
