| 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 |
| 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 |
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| DOI：10.7606/j.issn.1000-7601.2017.02.16 |
| 中文关键词: 小黑麦 萌发期 抗旱条件 抗旱指标 筛选 |
| 英文关键词:triticale germination stage drought condition drought-resistant parameter screening |
| 基金项目:国家自然基金（31360577）；教育部博士点基金（20136202110005）；公益性行业（农业）科研专项（201003019）；现代农业产业技术体系建设专项资金资助（CARS-40-09B） |
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| 中文摘要: |
| 以4个小黑麦种质为材料，用不同浓度（0，10%，20%，30%，40%）PEG-6000对萌发期种子进行干旱胁迫处理，通过测定种子发芽率、发芽势、发芽指数、胚根与胚芽鞘长度，以研究小黑麦萌发期抗旱模拟条件。利用灰色关联分析法筛选出了适宜于小黑麦萌发期抗旱性评价的指标，同时以各指标与抗旱指数之间的相关性，结合隶属函数法对4个小黑麦种质的抗旱性进行了综合评价。结果表明，30% PEG-6000溶液为小黑麦种子萌发期抗旱性鉴定的适宜模拟条件；发芽率与萌发期抗旱性关系最密切；低浓度（10%，20%）PEG-6000有利于小黑麦种子萌发，并对幼苗根与胚芽的生长有一定促进作用，40% PEG-6000完全抑制小黑麦种子发芽；参试小黑麦种质抗旱性强弱为：中饲1048>石大1号>P4>P2，中饲1048小黑麦属于中抗旱型，石大1号属于中间型，其余2份小黑麦种质属于干旱敏感型。 |
| 英文摘要: |
| 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-6000 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. |
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