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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (3): 23-28.doi: 10.11924/j.issn.1000-6850.2014-1916

Special Issue: 水稻

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Screening and Evaluation of Rice Drought Resistance at Seedling Stage

闫平,, and   

  • Received:2014-07-11 Revised:2014-07-11 Accepted:2014-08-26 Online:2015-03-19 Published:2015-03-19

Abstract: The effect of drought stress on morphological characters and repeated drought survival rate at seedling stage were studied by repeated drought stress method at seedling stage, in order to compare drought resistance of dominate cultivated japonica rice varieties at seedling stage in Heilongjiang Province. Drought resistance varieties were screened through cluster analysis. The results indicated that: morphological parameters such as plant height, leaf dry weight, leaf fresh weight, root number, root length and root dry weight were less than 100% after repeated drought treatment. Seedling survival rate dropped remarkably, different varieties with different extent. Principal component analysis and correlation analysis proved that plant height, leaf dry weight, leaf fresh weight, root length and root dry weight could be taken as drought resistance identification morphological parameter at seedling stage.‘Dongnong 426’,‘Songjing 6’,‘Wuyou 1’,‘Song 05-274’and‘Song 05-276’were screened as varieties with good drought resistance at seedling stage by overall consideration of repeated drought survival rate and cluster analysis.