ACTA AGRICULTURAE BOREALI-SINICA ›› 2015, Vol. 30 ›› Issue (6): 140-145. doi: 10.7668/hbnxb.2015.06.021

Special Issue: Rice Drought and water saving

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Comprehensive Evaluation of Drought Resistance During Rice Panicle Differentiation Stage

YANG Gui-li, YANG Mei-na, HUANG Cui-hong, QU Zhi-heng, CHEN Zhi-qiang, WANG Jia-feng   

  1. National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
  • Received:2015-09-28 Published:2015-12-28

Abstract: This research was conducted to study the effects of drought on rice growth during rice panicle differentiation stage and to screen for drought-tolerant germplasm.Drought tolerance of 56 candidate rice lines during rice panicle differentiation stage was investigated by measuring 8 physiological indicators related with photosynthesis,photosynthesis transpiration rate,and anti-ROS on the greenhouse screening platform.The agronomic yield traits were also measured under the normal and stressed conditions.The results showed that the value of stomata resistance and canopy temperature under drought stress were significantly higher than CK,suggesting that drought stress mainly affect the changing of photosynthetic rate and transpiration characteristics during this period.In addition,3 highly drought resistant rice strains were screened out from the tested materials through principal component analysis and subordinate functions values analysis.Finally,the comparison of main agronomic characteristics under drought and irrigation showed that seed set was significantly correlated with comprehensive drought resistance capability D value and could be used as the yield trait index during rice panicle differentiation stage.

Key words: Oryza sativa L., Panicle differentiation stage, Drought stress, Comprehensive drought capability, Agronomic character

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Cite this article

YANG Gui-li, YANG Mei-na, HUANG Cui-hong, QU Zhi-heng, CHEN Zhi-qiang, WANG Jia-feng. Comprehensive Evaluation of Drought Resistance During Rice Panicle Differentiation Stage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(6): 140-145. doi: 10.7668/hbnxb.2015.06.021.

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