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利用浓度为25%的人工配制海水对25个芦笋品种进行了芽期和苗期的胁迫处理,调查发芽势、发芽指数、活力指数、胚根长、株高、茎数、茎粗、根鲜质量、根干质量以及根体积等10个农艺性状,以各性状耐盐系数作为衡量耐盐性的指标,利用多元统计分析方法对芦笋品种的耐盐性进行了综合评价。结果表明,调查的10个性状指标在品种间差异显著,因子分析将其集约于3个主因子上,即种子活力因子、根部因子和生长因子,主因子累计贡献率达82.2%。基于品种因子得分值进行聚类分析,25个芦笋品种可分为4类,即耐盐品种、较耐盐品种、中度耐盐品种和盐敏感品种。本研究建立的人工海水胁迫处理鉴定芦笋品种耐盐性的综合评价方法,可为芦笋材料耐盐性鉴定和耐盐育种提供理论参考。
The 25 asparagus cultivars were treated with 25% artificial seawater for stress treatment at bud and seedling stage. The germination potential, germination index, vigor index, radicle length, plant height, stem number, stem diameter, Quality, root dry weight and root volume of 10 agronomic traits, salt tolerance coefficient of each trait as an index to measure salt tolerance, the multivariate statistical analysis of salt tolerance of asparagus varieties were comprehensively evaluated. The results showed that there were significant differences in the ten traits among the cultivars. The factor analysis concentrated on three main factors, namely seed vigor factor, root factor and growth factor, with the total contribution rate of 82.2%. Cluster analysis based on the scores of variety factors, 25 asparagus varieties can be divided into four categories, namely salt-tolerant varieties, salt-tolerant varieties, moderate salt-tolerant varieties and salt-sensitive varieties. The synthetic evaluation method for salt tolerance of asparagus cultivated by artificial seawater stress established in this study can provide theoretical reference for salt tolerance identification and salt-tolerant breeding of asparagus material.