Canopy Temperature and Chlorophyll Content are Effective Measures of Drought Stress Tolerance in Durum Wheat

  • Fereshteh JOKAR Yasouj University, Faculty of Agriculture, Department of Agronomy and Plant Breeding, Yasouj (IR)
  • Rahmatollah KARIMIZADEH Education and Extension Organization (AREEO), Dryland Agriculture Research Institute (DARI), Gachsaran (IR)
  • Asad MASOUMIASL Yasouj University, Faculty of Agriculture, Department of Agronomy and Plant Breeding, Yasouj (IR)
  • Reza AMIRI FAHLIANI Yasouj University, Faculty of Agriculture, Department of Agronomy and Plant Breeding, Yasouj (IR)
Keywords: genotype; rain-fed; screening; supplementary irrigation; yield


Durum wheat (Triticum durum L.) is used for the preparation of multiple food products, including pasta and bread. Its production is restricted due to diverse environmental stresses i.e. drought and heat stress. Here, comparative analysis of durum wheat varieties was done by studying canopy temperature depression (CTD) and chlorophyll content (CHL), yield and yield contributing traits to evaluate their performance under stress and low stress conditions. Twelve durum wheat genotypes were studied under stressful and low-stress conditions in Gachsaran region of Iran. CTD and CHL were measured at two stages, from the emergence of fifty percent of inflorescence (ZGS 54) to watery ripe stage (ZGS 71). According to stress tolerance index (STI), mean productivity (MP) and geometric mean productivity (GMP) indices, genotype G10 exhibited the most, while genotype G6, the least relative tolerance, respectively. Based on MP and GMP, genotype G10 was found to be drought tolerant, while genotype G2 displayed the lowest amount of MP and GMP. Therefore these genotypes are recommended to be used as genitors in artificial hybridization for improvement of drought tolerance in other cultivars. All indices had high correlation with grain yield under stress and non-stress condition, indicating more suitability of these indices for selection of resistant genotype. Results of the present study showed that among drought tolerance indices, harmonic mean (HM), GMP, CTD and modified STI index (K2STI) can be used as the most suitable indicators for screening drought tolerant cultivars.


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How to Cite
JOKAR, F., KARIMIZADEH, R., MASOUMIASL, A., & AMIRI FAHLIANI, R. (2018). Canopy Temperature and Chlorophyll Content are Effective Measures of Drought Stress Tolerance in Durum Wheat. Notulae Scientia Biologicae, 10(4), 575-583.
Research articles
DOI: 10.15835/nsb10410288