| 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 |
| Key Words: eggplant for rootstock germplasm seedling stage salt tolerance |
| Author Name | Affiliation | | ZOU Min | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | TAO Tao | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | TIAN Shibing | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | ZHOU Shanshan | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | LIU Fuzhong | Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | WANG Yikui | Institute of Vegetable, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | YANG Yang | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China | | WANG Yongqing | Chongqing Academy of Agricultural Sciences, Chongqing 401329, China |
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| Abstract: |
| 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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