摘要
为实现甘薯耐旱性品种的快速筛选,本试验采用室内PEG模拟连续干旱法对22个甘薯品种(系)进行了研究。结果表明:济薯21、12057、11001和零9281等品种(系)的根系持水力、根系活力和幼苗成活率较高,具有较强的苗期耐旱性;通过统计分析发现,根系持水力、薯苗质量和含水量、根系活力等可作为重要的苗期耐旱性筛选指标;干旱胁迫下根系的持水能力和采苗后薯苗状况是影响甘薯苗期耐旱性的重要因素。在生产上,选用耐旱性品种和采用壮苗是抵御干旱胁迫的重要措施。
In order to screen drought resistance varieties of sweetpotato rapidly ,22 sweetpotato varieties ( lines) were studied by indoor simulated continuous drought method with PEG .The results showed that the roots water retention ,root activity and seedling survival rate of Jishu 21 ,12057 ,11001 and 09281 were higher , which implied strong drought resistance in seedling stage .Through statistical analysis , the roots water reten-tion,seedling quality ,water content of seedling and root activity could be used for important screening indexes of drought resistance in seedling .The water retention capacity of roots under drought stress and seedling status after cutting were the important factors influencing the sweetpotato seedling drought resistance .In production , selecting drought tolerance varieties and strong seedlings are important measures to resist drought stress .
出处
《山东农业科学》
2015年第3期22-26 36,36,共6页
Shandong Agricultural Sciences
基金
国家甘薯产业技术体系"北方区栽培岗位"项目(CARS-11-B-11)资助
关键词
甘薯
干旱胁迫
苗期
Sweetpotato
Drought resistance
Seedling
