干旱地区农业研究2017，Vol.35Issue(2)：96-102,7.DOI:10.7606/j.issn.1000-7601.2017.02.16
小黑麦萌发期抗旱条件模拟和抗旱指标的筛选
Screening on drought simulation conditions and drought-resistant parameters at germination stage of triticale
摘要
Abstract
Using 4 triticale genotypes as materials,an experiment was carried out with different concentrations (0,10％,20％,30％ and 40％) of polyethylene glycol (PEG-6000) to simulate drought stress,and the parameters including seed germination potential,germination rate,germination index and length of primary root and coleoptiles were measured,so as to study drought simulation conditions at germination stage of triticale.The gray correlative degree analysis was adopted to screen drought-resistant parameters.Furthermore,the drought resistance of different triticale genotypes was evaluated,based on the correlation between drought resistant index and various parameters and combined with subordinate function method.The results showed that the suitable PEG-5000 concentration for screening drought resistance of triticale at germination stage was 30％;the germination rate was most closely related to drought resistance of triticale at germination stage;low PEG-6000 concentration (10％ and 20％) was beneficial to seed germination of triticale and could stimulate the growth of primary root and coleoptile,but 40％ PEG-6000 inhibited seed germination completely.The drought resistance of the tested triticale genotypes was ordered as:Zhongsi 1048 ＞ Shida No.1 ＞ P4 ＞ P2.Zhongsi 1048 belonged to the medium drought-resistant type,Shida No.1 belonged to the middle type and the other 2 belonged to the drought-sensitive type.关键词
小黑麦/萌发期/抗旱条件/抗旱指标/筛选Key words
triticale/germination stage/drought condition/drought-resistant parameter/screening分类
农业科技引用本文复制引用
赵方媛,田新会,杜文华..小黑麦萌发期抗旱条件模拟和抗旱指标的筛选[J].干旱地区农业研究,2017,35(2):96-102,7.基金项目
国家自然基金(31360577) （31360577）
教育部博士点基金(20136202110005) （20136202110005）
公益性行业(农业)科研专项(201003019) （农业）
现代农业产业技术体系建设专项资金资助(CARS-40-09B) （CARS-40-09B）
