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- Title
An Evaluation of Drought Tolerant Genotypes in Bread Wheat (Triticum aestivum L.) Genotypes Using Morpho-Physiological Traits and Yield Based Selection Indices.
- Authors
Golabadi, Maryam; Golkar, Pooran; Zadfar, Pegah
- Abstract
This study aimed to evaluate the drought tolerance of fifteen bread wheat genotypes using various morphophysiological traits, including flag leaf length (FL), flag leaf width (FW), relative water content (RWC), excised leaf water retention (ELWR), rate of water loss (RWL), leaf water content (LWC), grain yield, and biological yield. Eight drought tolerance indices were used to assess the level of sensitivity of bread wheat genotypes to drought stress, including yield stability index (YSI), yield index (YI), stress tolerance index (STI), geometric mean productivity (GMP), stress susceptibility index (SSI), mean productivity (MP), stress tolerance (TOL), and harmonic mean (HM). The STI, MP, and GMP indices were significantly and positively correlated with yield under rain-fed and irrigated conditions (0.66 to 0.90); and hence, they were identified as the best selection indices for distinguishing drought tolerance. Based on biplot analysis, Sepahan and Rowshan were superior varieties under rain-fed and irrigated conditions, making them recommendable for cultivation for their stable yield. In addition, these two genotypes had the least yield reduction (141 to 147g/m2) between two environments.
- Subjects
WHEAT; GENOTYPES; DROUGHT tolerance; DROUGHTS; GRAIN yields
- Publication
Jordan Journal of Agricultural Sciences, 2018, Vol 14, Issue 2, p159
- ISSN
1815-8625
- Publication type
Article