STUDY OF PHYSIOLOGICAL AND MORPHOLOGICAL TRAITS RELATED TO DROUGHT TOLERANCE IN BREAD WHEAT

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ABD ALSHAHI R.A.; TALEEI ALI REZA; OMIDI MANSOUR; YAZDI SAMADI B.

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Journal: Iranian Journal of Field Crop Science Year:2010 | Volume:41 | Issue:2 Page(s): 247-258

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Title

STUDY OF PHYSIOLOGICAL AND MORPHOLOGICAL TRAITS RELATED TO DROUGHT TOLERANCE IN BREAD WHEAT

Author(s)

ABD ALSHAHI R.A. | TALEEI ALI REZA | OMIDI MANSOUR | YAZDI SAMADI B. | Issue Writer Certificate

Keywords

WHEATQ3

DROUGHT STRESSQ2

OSMOTIC ADJUSTMENTQ2

ROOT SYSTEMQ2

WATER USE EFFICIENCYQ2

Abstract

Breeding for improvement of yield in drought prone environments has had small progress because of low heritability, changing rainfall, and genotype/ environment interaction. Hence, instead of direct selection, drought tolerance mechanisms (secondary traits) should be evaluated. OSMOTIC ADJUSTMENT, appropriate ROOT SYSTEM and WATER USE EFFICIENCY are some of the most important mechanisms for drought tolerance. Evaluation of these mechanisms in field is either difficult and/or expensive. Therefore, for their evaluation, glasshouse or growth chamber experiments are needed. In this research for an evaluation of drought tolerance mechanism in 3 genotypes named Kukry, Excalibur, and RAC875 in 2 type of soil (Roseworthy and UC mix) and 2 moisture conditions (normal and drought) a factorial experiment of a CRD design with 3 replications was carried out. OSMOTIC ADJUSTMENT for evaluated genotypes were higher for drought conditions (817.0) as compared with normal (478.1), but there were no significant differences observed among genotypes. Hence, the evaluated genotypes exhibited no mechanism for OSMOTIC ADJUSTMENT. In drought condition, root length was reduced while root thickness increased. Kukry bore a poor ROOT SYSTEM in both drought and normal conditions while in contrast Excalibur benefitted from a good ROOT SYSTEM in both conditions. Although RAC875 and Kukry had the same ROOT SYSTEM at normal condition but RAC875 carried a better ROOT SYSTEM at drought condition. Excalibur and Kukry exhibited better ROOT SYSTEMs so they could uptake more water. RAC875 had excellent WATER USE EFFICIENCY but there were no significant differences observed between Kukry and Excalibur. Tolerant genotypes showed better early vigor in comparison with the sensitive variety, Kukry.

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APA: Copy

ABD ALSHAHI, R.A., TALEEI, ALI REZA, OMIDI, MANSOUR, & YAZDI SAMADI, B.. (2010). STUDY OF PHYSIOLOGICAL AND MORPHOLOGICAL TRAITS RELATED TO DROUGHT TOLERANCE IN BREAD WHEAT. IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 41(2), 247-258. SID. https://sid.ir/paper/153514/en

Vancouver: Copy

ABD ALSHAHI R.A., TALEEI ALI REZA, OMIDI MANSOUR, YAZDI SAMADI B.. STUDY OF PHYSIOLOGICAL AND MORPHOLOGICAL TRAITS RELATED TO DROUGHT TOLERANCE IN BREAD WHEAT. IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2010;41(2):247-258. Available from: https://sid.ir/paper/153514/en

IEEE: Copy

R.A. ABD ALSHAHI, ALI REZA TALEEI, MANSOUR OMIDI, and B. YAZDI SAMADI, “STUDY OF PHYSIOLOGICAL AND MORPHOLOGICAL TRAITS RELATED TO DROUGHT TOLERANCE IN BREAD WHEAT,” IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 41, no. 2, pp. 247–258, 2010, [Online]. Available: https://sid.ir/paper/153514/en

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