Evaluation of Stress Tolerance in Durum Wheat Genotypes Based on Tolerance Indices

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ASGHARI ALI; Tadili Sahar; KARIMIZADEH RAHMATOLLAH; Sofalion Omid; MOHAMMADDOUST CHAMANABAD HAMIDREZA

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Journal: JOURNAL OF CROP BREEDING Year:2020 | Volume:12 | Issue:34 Page(s): 185-198

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Title

Evaluation of Stress Tolerance in Durum Wheat Genotypes Based on Tolerance Indices

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Keywords

BiplotQ3

Factor AnalysisQ2

Cluster AnalysisQ1

Drought Tolerance IndicesQ1

Abstract

In order to evaluate the drought stress tolerance of durum wheat genotypes, an experiment was conducted at Gachsaran Dryland Research Center, Iran during 2017-18. A total of 18 durum wheat genotypes were studied in a randomized complete block design with four replications under rainfed and supplementary irrigation conditions. The results of combined analysis of variance showed that supplementary irrigation significantly increased grain yield. In supplementary irrigation condition, the genotypes 16, 17 and 18 and in rain fed condition the genotypes 4, 16 and 17 had the highest grain yield per hectare. The stress tolerance indices were calculated based on yield of genotypes in rain fed and supplementary irrigation conditions. With considering of significant positive correlation between grain yield in the rain fed condition (YS) with relative drought index (RDI), mean productivity index (MP), stress tolerance index (STI), yield index (YI), geometric mean productivity index (GMP), new drought resistance index (DI), improved stress tolerance index (MSTI), non-Stress Environmental Stress Index (SNPI) and harmonic Mean Index (HARM), these indices are suitable for identification of stress tolerant lines. Stress susceptibility index (SSI), yield stability index (YSI), abiotic stress tolerance index (ATI) and stress sensitivity percentage index (SSPI) did not play a significant role in the differentiation of genotypes. On the other hand, there was a significant positive correlation between grain yield in supplemental irrigation with TOL, MP, YI, MSTI, SSPI, ATI, SSI and STI. Grouping of genotypes using Cluster Analysis method showed that the genotypes were classified into four distinct groups and genotypes 4, 16 and 17 were in the fourth group with the highest tolerance indices compared to the other. Genotypes 7, 8 and 10, which had the lowest yield and also the lowest amount for the most indices, were identified as the most susceptible to drought stress. The results of Factor Analysis confirmed the above results.

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APA: Copy

ASGHARI, ALI, Tadili, Sahar, KARIMIZADEH, RAHMATOLLAH, Sofalion, Omid, & MOHAMMADDOUST CHAMANABAD, HAMIDREZA. (2020). Evaluation of Stress Tolerance in Durum Wheat Genotypes Based on Tolerance Indices. JOURNAL OF CROP BREEDING, 12(34 ), 185-198. SID. https://sid.ir/paper/391112/en

Vancouver: Copy

ASGHARI ALI, Tadili Sahar, KARIMIZADEH RAHMATOLLAH, Sofalion Omid, MOHAMMADDOUST CHAMANABAD HAMIDREZA. Evaluation of Stress Tolerance in Durum Wheat Genotypes Based on Tolerance Indices. JOURNAL OF CROP BREEDING[Internet]. 2020;12(34 ):185-198. Available from: https://sid.ir/paper/391112/en

IEEE: Copy

ALI ASGHARI, Sahar Tadili, RAHMATOLLAH KARIMIZADEH, Omid Sofalion, and HAMIDREZA MOHAMMADDOUST CHAMANABAD, “Evaluation of Stress Tolerance in Durum Wheat Genotypes Based on Tolerance Indices,” JOURNAL OF CROP BREEDING, vol. 12, no. 34 , pp. 185–198, 2020, [Online]. Available: https://sid.ir/paper/391112/en

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