Journal of Crop Science and Biotechnology

, Volume 22, Issue 1, pp 21–29 | Cite as

Uni- and Multi-Variate Assessment of Drought Response Yield Indices in 10 Wheat Cultivars

  • Bardees MickkyEmail author
  • Heshmat Aldesuquy
  • Mustafa Elnajar
Research Article


Wheat (Triticum aestivum L.) is a major cereal with its productivity being highly affected by drought. In the current study, 10 wheat cultivars were evaluated for their grain yield under well-watered (Yp) and drought (Ys) conditions. Various drought response indices (mean productivity (MP), geometric productivity (GMP), tolerance index (TOL), stress susceptibility index (SSI), stress tolerance index (STI), harmonic mean of yield (HARM), yield stability index (YSI), relative drought index (RDI), two drought resistance indices (DRI1 and DRI2), yield reduction ratio (YRR) and yield index (YI)) were determined to identify high-yielding and drought tolerant cultivars. Spearman’s correlation coefficient among the estimated indices, hierarchical clustering of the concerned cultivars as well as principle component analysis (PCA) of both the indices and cultivars were employed. Wheat cultivars Sids 13 and Gemmeiza 11 were superior while Sakha 94 and Shandaweel 1 were inferior depending upon their Yp, Ys and drought response indices. Also, a non-significant positive correlation was recorded between Yp and Ys of the studied cultivars with GMP, STI and HARM being significantly correlated with both Yp and Ys. Based on PCA, Yp and Ys explained 61.6 and 38.1% of the total variation; respectively. Furthermore, cluster analysis sequestered the concerned cultivars into drought susceptible cultivars (Shandaweel 1, Giza 168 and Gemmeiza 11), drought moderate ones (Misr 2, Sakha 93 and Sakha 94) and drought tolerant ones (Misr 1, Sids 13, Gemmeiza 9 and Sids 12) based on the mean values of YSI, RDI, TOL, SSI and YRR within each group.

Key words

Wheat drought yield response indices correlation principle component analysis cluster analysis 


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Copyright information

© Korean Society of Crop Science and Springer 2019

Authors and Affiliations

  • Bardees Mickky
    • 1
    Email author
  • Heshmat Aldesuquy
    • 1
  • Mustafa Elnajar
    • 1
  1. 1.Botany Department, Faculty of ScienceMansoura UniversityMansouraEgypt

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