| 邹敏,陶涛,田时炳,周珊珊,刘富中,王益奎,杨洋,王永清.139份砧用茄子种质资源苗期耐盐性评价[J].干旱地区农业研究,2025,(2):22~31 |
| 139份砧用茄子种质资源苗期耐盐性评价 |
| Evaluation of salt tolerance in the seedling stage of 139 eggplant germplasm resources for rootstock |
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| DOI：10.7606/j.issn.1000-7601.2025.02.03 |
| 中文关键词: 砧用茄子 种质 苗期 耐盐性 |
| 英文关键词:eggplant for rootstock germplasm seedling stage salt tolerance |
| 基金项目:国家大宗蔬菜产业技术体系（CARS-23-A08）；重庆市农业种质资源精准鉴定项目（2023）；重庆市市级财政科技创新类项目（KYLX20240500044） |
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| 中文摘要: |
| 以清水为对照，测定200 mmol·L-1 NaCl处理下139份砧用茄子种质资源幼苗植株鲜质量、根冠比、株高、叶片数、绿叶比等7个指标。对各性状进行变异分析，结果显示：盐胁迫下5个性状（绿叶比、叶片数、株高、植株鲜质量和地上部鲜质量）受到明显抑制，抑制幅度为11.88%~43.64%，但根鲜质量增加1.46%，根冠比增加76.77%。对各性状耐盐系数进行相关性分析、主成分分析、隶属函数分析、聚类分析，结果表明：不同种质变异系数介于12.03%~22.42%；3个主成分的累计贡献率为81.45%，各因子负荷量最大的指标为地上部鲜质量、根鲜质量和绿叶比，相关系数分别为0.555、0.685和0.743，可作为砧用茄子苗期耐盐性评价的主要指标；聚类分析将139份种质分为5类：第Ⅰ类为盐敏感型种质（13份），第Ⅱ类为高盐敏感型种质（5份)，第Ⅲ类为耐盐中间型种质（77份)，第Ⅳ类为高耐盐型种质(5份)，第Ⅴ类为耐盐型种质(39份)。本研究筛选到高耐盐的砧用茄子种质资源5份（Ng1-020、GX100、LJ-13、GX91和GX156），可为茄子耐盐砧木新品种培育提供参考。 |
| 英文摘要: |
| In this study, 139 eggplant germplasm resources for rootstock were treated with 200 mmol·L-1 NaCl (with water as control) at the seedling stage. Seven traits, including plant fresh mass, root\|shoot ratio, shoot length, number of leaves, and the ratio of green leaves, were investigated. Variation analysis of 7 traits showed that 5 traits (the ratio of green leaves, number of leaves, shoot length, plant fresh mass, and shoot fresh mass) were obviously inhibited by 11.88% to 43.64% under salt stress. Furtherly, the root fresh mass increased by 1.46% and the root\|shoot ratio increased by 76.77%. Correlation analysis, principal component analysis, membership function analysis and cluster analysis were applied to the salt tolerance coefficients of 7 traits. The results indicated that the coefficient of variation between different resources ranged from 12.03% to 22.42%. The cumulative rate of the 3 principal components was 81.45%. The shoot fresh mass, root fresh mass and ratio of green leaves showed maximum load, with the correlation coefficients being 0.555, 0.685 and 0.743, respectively. These factors had implications in the evaluation of salt tolerance in eggplant at seedling stage. Cluster analysis divided 139 eggplant germplasm resources into 5 categories: 13 salt\|sensitive germplasm resources in Class I, 5 high salt\|sensitive germplasm resources in Class II, 77 medium salt\|tolerant germplasm resources in Class III, 5 high salt\|tolerant germplasm resources in Class IV and 39 salt\|tolerant germplasm resources in Class V. In this study, five highly salt\|tolerant eggplant germplasm resources were identified: Ng1-020, GX100, LJ-13, GX91, and GX156. These findings provide both theoretical and practical guidance for the development of new salt\|tolerant rootstock varieties in eggplant cultivation. |
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