Evaluation for Salt Tolerance of 50 Jute Germplasm Resources
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    Abstract:

    The objectives of this study was to comprehensively evaluate the salt tolerance of 50 jute germplasm resources from different countries, providing a theoretical basis for evaluation on salt tolerance of amounts of jute germplasm resources, and to dig the extreme materials on salt tolerance, providing basic materials for salt-tolerance gene discovery and the study of molecular mechanism. In this study,50 jute materials were cultured with hydroponics supplemented with NaCl at different concentrations of 0, 250mmol.L-1, repectively. Then the salt injury index after treatment and death rate on the eighth day (DR) of 50 materials were investigated. The regression equation models reflecting the correlation between stressed duration and salt injury index of jute materials were established, in order to get the time when the symptom of salt damage appeared(SA) and salt injury index up to 50%(SX). And 50 jute germplasm resources were evaluated for salt tolerance and classified by principle components analysis, subordination function method and hierarchical cluster analysis. The result showed that 250mmol.L-1NaCl was demonstrated a suitable concentration for screening salt tolerant materials in this experiment. 50 regression equations established demonstrated fitted well. Based on the comprehensive ability of salt tolerance of materials and cluster analysis, 50 jute germplasm resources could be classified into 4 grades. 3 materials were highly salt tolerant, 6 materials were salt tolerant, 31 materials were middle tolerant, and 10 materials were salt sensitive. And the best salt-tolerant material was TC008-41, and the weakest one in salt resistence was NY/252C.

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History
  • Received:March 10,2017
  • Revised:April 13,2017
  • Adopted:May 16,2017
  • Online: November 01,2017
  • Published:
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