Screening for Drought-Resistant Wheat Varieties in Northern Central Area of Hebei Province
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1College of Agronomy, Hebei Agricultural University/Key Laboratory of Research and Utilization of Crop Germplasm Resources in North China, Ministry of Education, Baoding 071000; 2Baoding Academy of Agricultural Sciences, Baoding 071000

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National key Research & Development Project

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    Abstract:

    Drought is one of the major limiting factors that affect the wheat yield production in north China. Identification of drought-resistant accessions from newly released wheat varieties is of great importance, in order to ensure stability of wheat production in this area. The present study attempted to screen droughtresistant varieties from 13 wheat varieties in central and north area of Hebei province under field conditions with different water regimes. If compared to normal watering regime, several agronomical traits including plant height, thousand kernel weight, kernels per spike, spikes per mu, grain yield, chlorophyll content and leaf water loss rate in vitro of wheat decreased significantly with variation under limited water regimes. A slight difference on the resistance level of the varieties was observed using three indexes consisting of drought resistance index ( DI), weighed drought resistance index( WDI) and drought-resistance comprehensive evaluation value( D) respectively, while two varieties were qualified showing drought-resistant. Three water-saving varieties have been identified by evaluating with water-saving index. Among the agronomic and physiological traits tested, the chlorophyll content, spikelet per spike, plant height, water loss rate of cutting leaves, flag leaf length and kernels per spike were found to be associated with drought resistance, and the chlorophyll content and spikelet per spike might serve as indicators simplifying the drought evaluation process.

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History
  • Received:March 24,2020
  • Revised:July 19,2020
  • Adopted:August 28,2020
  • Online: January 07,2021
  • Published:
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