摘要
以收集及引进的50个小麦品种为材料,通过小麦幼苗干旱胁迫试验筛选耐旱小麦种质,结合旱胁迫相关指标测定,揭示耐旱生理指标与耐旱性能相关性。结果表明,小麦幼苗经干旱处理复水后品种间成活率差异显著,其中川麦42、西农2000和洲元936的成活率均高于65%,其他品种低于42%。进一步分析3个耐旱品种和随机选择的3个干旱敏感型品种在干旱胁迫下4种生理指标的差异表明,耐旱性小麦品种幼苗叶片中K^+、可溶性糖及Pro含量均显著高于旱敏感型品种,而MDA含量降低,表明小麦苗期幼苗叶片中K^+、可溶性糖、Pro及MDA含量与小麦耐旱性能具有相关性。
To reveal the relationship between the drought-related physiological indices and the drought-tolerant performance,50 wheat landrace and elite accessions in total from inland and abroad are used for screening the drought-tolerant wheat germplasm during the seedling stage followed by a statistical analysis for the drought tolerant potential and the four physiological indices including the leaf potassium（K~＋）,the soluble sugar,the malondialdehyde（MDA）,and the proline（Pro） content. The screening result shows that the seedling survival differs dramatically after desiccation. Among them,Chuanmai 42,Xinong 2000,and Zhouyuan 936 show a high survival rate of over 65%,with the rest lower than 42%. The 4 physiological indices are determined for the above three high drought-tolerance wheat accessions and three low drought-tolerance ones（Kefeng10,Chinese Spring and Yumai 9676） selected at random. Correlation analysis shows a positive relationship between the drought resistance and the leaf K~＋,the soluble sugar,and the Pro levels while negative in terms of the MDA content,which implies a high correlation between the four selected physiological indices and the drought-tolerant performance.
出处
《科技导报》
CAS
CSCD
北大核心
2016年第22期95-101,共7页
Science & Technology Review
基金
国家自然科学基金项目(31401376)
安徽省农业科学院科技创新团队项目(13C0202)
安徽省种子工程项目(14D0202)
关键词
小麦
耐旱性
生理指标
成活率
相关性分析
wheat
drought resistance
physiological indices
survival rate
correlation analysis
