Evaluation and Screening of Pea Germplasm Resources for Drought Resistance at Bud Stage
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    Abstract:

    PEG-6000 was used as permeability media, to study dynamic change of germination energy, germination rate, germination index and vigor index of four pea varieties under six different PEG-6000 concentrations. The results showed that 20%-25% of PEG-6000 was the suitable concentration range to screen drought resistance resources at bud stage for pea. Drought resistance of 87 pea accessions from 18 different provinces of China were evaluated with 22% PEG-6000 solution. The principal component analysis results showed that relative values of germination energy, germination rate, radical length, radical fresh biomass, and germination drought resistance index, germination stress index, vigor index were the main impact factors to evaluate drought resistance for pea. Based on the subordinative function analysis of screening results, one germplasm (G0002457) with the highest level of drought resistance and seven general drought resistant germplasms were identified and recommended to be used in the drought tolerance improvement for pea breeding.

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History
  • Received:December 10,2016
  • Revised:January 12,2017
  • Adopted:February 21,2017
  • Online: July 14,2017
  • Published:
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