EFFECTS OF MORPHOLOGICAL TRAITS AND THEIR RELATIONS TO STRESS SUSCEPTIBILITY INDEX IN SEVERAL WHEAT GENOTYPES

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NABIPOUR A.R.; YAZDI SAMADI B.; ZALI A.A.; POUSTINI K.

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Journal: Desert Year:2002 | Volume:7 | Issue:1 Page(s): 31-47

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Title

EFFECTS OF MORPHOLOGICAL TRAITS AND THEIR RELATIONS TO STRESS SUSCEPTIBILITY INDEX IN SEVERAL WHEAT GENOTYPES

Author(s)

NABIPOUR A.R. | YAZDI SAMADI B. | ZALI A.A. | POUSTINI K. | Issue Writer Certificate

Keywords

WHEATQ3

DROUGHTQ2

STRESS SUSCEPTIBILITY INDEXQ4

LANDRACESQ4

Abstract

Drought is a major environmental factor reducing grain production of rainfed WHEAT (Triticum aestivum L.) in semiarid regions. In an experiment aimed at evaluating effects of DROUGHT on some morphological traits of WHEAT and assessing relationships between these traits and STRESS SUSCEPTIBILITY INDEX, eight WHEAT genotypes, including four LANDRACES from Iran and four commercial cultivars, were grown under wel-watered and rainfed environments, at the University of Tehrans' Research Farm in Karaj. Stress susceptibility of each genotype was estimated using a calculated index based on grain yield. Significant differences were found between all genotypes for all studied traits. Landrace genotypes and improved cultivars .that were evaluated, exhibited a wide range of stress susceptibility. Stress susceptibility and yield potential were not associated, to indicating that they might be independent components both contributing in adaptation to stress environments. STRESS SUSCEPTIBILITY INDEX was negatively correlated with grain yield and biomass under stress conditions, indicating that selection for these characters under stress conditions might result in decreased susceptibility to DROUGHT. Analysis of variance showed that days to heading, harvest index, 1000 grain weight, number of grains per spike, grain yield, biomass, number of tillers, length of peduncle, plant height, length of spike, number of leaves per plant, and area of flag leaf decreased under DROUGHT conditions; however, stomatal frequency of flag leaf increased under such conditions. Among yield components, number of heads per plant was affected the least and number of grains per head was affected the most under stress conditions. Results showed that DROUGHT tolerant genotypes might be found in Iranian WHEAT collections.

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APA: Copy

NABIPOUR, A.R., YAZDI SAMADI, B., ZALI, A.A., & POUSTINI, K.. (2002). EFFECTS OF MORPHOLOGICAL TRAITS AND THEIR RELATIONS TO STRESS SUSCEPTIBILITY INDEX IN SEVERAL WHEAT GENOTYPES. DESERT (BIABAN), 7(1), 31-47. SID. https://sid.ir/paper/5330/en

Vancouver: Copy

NABIPOUR A.R., YAZDI SAMADI B., ZALI A.A., POUSTINI K.. EFFECTS OF MORPHOLOGICAL TRAITS AND THEIR RELATIONS TO STRESS SUSCEPTIBILITY INDEX IN SEVERAL WHEAT GENOTYPES. DESERT (BIABAN)[Internet]. 2002;7(1):31-47. Available from: https://sid.ir/paper/5330/en

IEEE: Copy

A.R. NABIPOUR, B. YAZDI SAMADI, A.A. ZALI, and K. POUSTINI, “EFFECTS OF MORPHOLOGICAL TRAITS AND THEIR RELATIONS TO STRESS SUSCEPTIBILITY INDEX IN SEVERAL WHEAT GENOTYPES,” DESERT (BIABAN), vol. 7, no. 1, pp. 31–47, 2002, [Online]. Available: https://sid.ir/paper/5330/en

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