Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (12): 2571-2576 .

• RESEARCH NOTES • Previous Articles     Next Articles

Studies on Using Rooting Capacity to Appraise the Drought Resistance of Different Varieties of Oryza sativa at Seedling Stage

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  1. 华中农业大学农学系
  • Received:2005-01-14 Revised:1900-01-01 Online:2005-12-10 Published:2005-12-10

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Abstract: Simple and rapid evaluation on drought-resistance of various varieties of rice can increase the selective efficiency and further quicken breeding program. To select an agronomic index is a key to appraise resistance. In this paper, the significant correlations between the range of reduction in rooting ability indexes, i.e. total root length, root number and root dry weight, and drought resistance at early stage of rice were observed in PEG treatment (25%). Additionally, measuring rooting capacity is characteristic of simplition and rapidity. So, the results suggest that rooting capacity may be used for evaluation on drought resistance of rice at early stage.

Key words: Oryza sativa, Seedling stage, Drought resistance, Rooting capacity

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