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Acta Agron Sin ›› 2017, Vol. 43 ›› Issue (09): 1381-1394.doi: 10.3724/SP.J.1006.2017.01381


Identification and Indices Screening of Drought Resistance at Adult Plant Stage in Job’s Tears Germplasm Resources

WANG Can1,2,**,ZHOU Ling-Bo1,2,**,ZHANG Guo-Bing1,2,ZHANG Li-Yi1,XU Yan1,GAO Xu1,JIANG Ne1,SHAO Ming-Bo1,2,*   

  1. 1 Institute of Upland Food Crops, Guizhou Academy of Agricultural Sciences, Guiyang 55006, China; 2 Guizhou Liangfeng Agricultural Science and Technology Co., LTD, Guiyang 550006, China
  • Received:2017-01-14 Revised:2017-04-20 Online:2017-09-12 Published:2017-04-27
  • Contact: 邵明波, E-mail: 563189433@qq.com E-mail:wangc.1989@163.com
  • Supported by:

    This study was supported by the Guizhou Agricultural Research Plan Project (QKHJNZ[2013]4025) and the Special Funds for Guizhou Agricultural Animal and Plant Breeding (QNYZZ[2012]023).


Drought is one of the major problems for Job’s tears production. The plant height, culm diameter, branch number, culm node number, tiller number, grain number per plant, grain weight per plant, 1000-grain weight, and yield of 50 accessions of Job’s tears germplasm were measured in normal irrigation and drought stress treatments. Drought resistance comprehensive evaluation value (D value), comprehensive drought resistance coefficient (CDC value), and weight drought resistance coefficient (WDC value) were used in correlation analysis, frequency analysis, principal component analysis, grey relational analysis, subordinate function analysis, clustering analysis, and stepwise regression analysis to identify and screen drought resistance indices at adult plant stage of tested Job’s tears germplasm. There were differences in response to drought stress and correlations between all indices. Six common factors could represent 90.80% of the original information of Job’s tears drought resistance data. The ranks of drought resistance of tested Job’s tears germplasm based on D value, CDC value, and WDC value were similar. The yield drought resistance coefficient (Y value) of tested Job’s tears germplasm had significant and positive correlation with D value, CDC value, and WDC value. Liangfengyi 14-2, yy03-8, and yy18-1 were identified as drought resistant Job’s tears germplasm at adult plant stage. Tiller number, grain weight per plant, and 1000-grain weight could be used as the intuitive identification indices for drought resistance in Job’s tears germplasm resources at adult plant stage.

Key words: Job’s tears, Adult plant stage, Drought resistance, Drought resistance indices, Comprehensive evaluation

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