干旱地区农业研究2016，Vol.34Issue(6)：228-234,279,8.DOI:10.7606/j.issn.1000-7601.2016.06.35
三个小麦新品种萌发期和幼苗期抗旱性的综合评价
Comprehensive evaluation of drought resistance of three new wheat cultivars at germination and seedling stage
摘要
Abstract
In order to identify the drought resistance of three new wheat cultivars Xinong 538,Xinong 556 and Xinong 558,three wheat cultivars Jinmai 47,Xiaoyan 22 and Xinong 979 with different drought resistance and large area of promotion were taken as control.The experiment was conducted under four PEG-6000 treatments (5％,10％,15％ and 20％) for six wheat cultivars.12 indices (germination rate,germination potential,coleoptile length,SOD,CAT,etc.) was investigated during germination and seedling stage.The comprehensive evaluation for wheat drought resistance was conducted by correlation analysis,principal component analysis and subordinate function analysis.The results indicated that there existed different degree of correlation among these indices and these indices had different effects on the drought resistance of the varieties.By principal component analysis,12 indices was transformed to three (under 15％ and 20％ PEG-6000) or four (under 5 ％ and 10％ PEG-6000) independent and synthesized indices,and the accumulative contribution rate were 92.61％ ％,92.96 ％,88.74 ％ and 93.12 ％ for stress treatments of 5 ％,10％,15 ％ and 20％,respectively.According to the synthetic evaluation value (D),six wheat cultivars were divided into three groups,in which "Xinong 538" and "Jinmai 47" belonged to the high drought resistance group,"Xinong 558" and "Xiaoyan 22" belonged to the medium drought resistance group,and "Xinong 556" and "Xinong 979" belonged to the low drought resistance group.关键词
小麦/萌发期/幼苗期/PEG胁迫/抗旱性Key words
wheat/germination stage/seedling stage/PEG stress/drought resistance分类
农业科技引用本文复制引用
张龙龙,杨明明,董剑,赵万春,高翔,陈冬阳..三个小麦新品种萌发期和幼苗期抗旱性的综合评价[J].干旱地区农业研究,2016,34(6):228-234,279,8.基金项目
“十二五”农村领域国家科技计划课题(2011AA100501) （2011AA100501）
国家现代农业产业技术体系研究项目(CARS-3-2-47) （CARS-3-2-47）
