›› 2012, Vol. 24 ›› Issue (5): 0-770.

• 论文 •    

Evaluation of drought resistance on the rice germplasms introducted from Myanmar at the seedling stage

DU Jia-hui;DONG Chao;TANG Cui-feng;XYU Fu-rong;ZHANG Fei-fei;YANG Ya-yun;ZHANG En-lai;A Xing-xiang;DAI Lu-yuan;*   

  1. 1College of Biotechnology and Agriculture, Yunnan Agricultural University, Kunming 650201, China;2Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences,Yunnan Provincial Key Lab of Agricultural Biotechnology, Key Lab of Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming 650223, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-09-24 Published:2012-09-24

Abstract: To evaluate the drought-resistance of 160 varieties introduced from Myanmar at seedling stage, Hanyou No.3, Hanyou No.8 were used as drought-resistant varieties but Zhenshan 97B as drought-sensitive variety in this study, respectively. Five drought-resistance indexes including survival percentage under repeated drought conditions, plant height, length of the fist leaf under central leaf, relative electrolyte leakage and malondialdehyde content under repeated drought conditions at seedling stage have been measured. Comprehensive appraisal index (comprehensive D values) was the five index of fuzzy subordinate-function(FSV) average. The drought resistance of resources introduced from Myanmar was classified into 4 levels of resistance, moderate resistance, moderate sensitivity, sensitivity accroding to D values of the control. And 18 materials with drought-tolerance were screened, which indicated the 18 materials can be used as breeding resources to improve the drought resistance of cultivated rice.

Key words: Myanmar, rice, seedling stage, repeated drought, fuzzy subordinate-function