| Study on drought-resistance identification methods and evaluation index of dry-land rice — Evaluation of drought-resistance of dry-land rice in seedling stage |
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| DOI：10.7606/j.issn.1000-7601.2005.04.27 |
| Key Words: dry-land rice varieties repeated drought drought resistance comprehensive drought-resistance classification seedling |
| Author Name | Affiliation | | WANG Yu-hong | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China | | YAO Yu-qing | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China | | ZHANG Can-jun | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China | | LU Jun-jie | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China | | ZHANG Jie | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China | | WANG Cong-hui | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China | | LI Jun-hong | Luoyang Dry-land Farming Experiment Station,Chinese Academy of Agricultural Sciences,Luoyang,Henan 471022,China |
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| Abstract: |
| indices, including seedling livability under repeated drought, plant height, lamina withering degree, lamina caducity resistance degree and root properties, were chosen to evaluate the drought-resistance of dry-land rice in seedling stage. Using the method of comprehensive drought-resistance classification, the tested varieties were ranked as: N422s/R8272>Zhenhan6>Handao110>IPAR>Handao277>Handao8>Zhenhan7>Liaoyou3072>Zhengzhouzaojing. The results showed that the method of comprehensive drought-resistance classification was coincident well to actual situation. By analyzing the relationship between drought-resistance and various indices, it was indicated that the seedling livability, lamina withering degree, root length, root dry weight, root/shoot ratio and rootstalk size could be adopted as the drought-resistance evaluation indices of dry-land rice in seedling stage, while the biomass weight and neonatal roots after drought stress could be used as reference indices. |
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