Volume 12, Issue 53 (vol. 12, no. 53 2023)
2023, 12(53): 355-370 |
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Pazireh S, Maghsiudi Moud A A, Tohidi Nejad E, Mohayeji M. Effect of terminal drought stress on photosynthetic pigments and nutritional value of bread wheat cultivars (Triticum aestivum L.) in Kerman. Plant Process and Function 2023; 12 (53) : 22
URL: http://jispp.iut.ac.ir/article-1-1590-en.html
URL: http://jispp.iut.ac.ir/article-1-1590-en.html
1- Department of agronomy and plant Breeding, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
2- Department of agronomy and plant Breeding, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran ,maghsoudi.aa@uk.ac.ir
2- Department of agronomy and plant Breeding, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran ,
Abstract: (732 Views)
In most of the wheat cultivated areas in the world, drought stress during the reproductive stages leads to a significant reduction in grain yield. Therefore, considering the arid and semi-arid climate of this country and the increased population ahead, it is necessary to identify cultivars tolerant to drought and related traits. On this basis, the present study was conducted as a randomized complete block design with three replications in the research farm of the Faculty of Agriculture, Shahid Bahonar University of Kerman in 2016-2017 cropping year. Experimental treatments included 28 bread wheat cultivars which were cultivated in two different environments (normal conditions and drought stress). GGE bipolates are one of the most accurate and efficient multivariate models. The GT type of this biplot deals with the relationships between traits in genotypes. Based on the results, the vectors in biplot showed that there was a strong and positive correlation between physiological traits such as chlorophyll pigments concentration, carotenoids, chlorophyll index, and relative water content with yield in both normal irrigation and terminal drought conditions. Under stress conditions, the concentration of elements had a negative correlation with yield, but this was with normal irrigation, whereas only microelements had a negative correlation. According to the biplot diagram, Roshan, Pishgam, Zagros, Omid, and Baran genotypes were introduced as the best genotypes for some or all of the traits under drought stress. On the other hand, evaluation of tolerance of genotypes with tolerance indices also showed that MP, GMP and STI indices had a positive and significant correlation with grain yield and therefore Alvand and Omid were identified as tolerant and sensitive genotypes, respectively. According to the present results, G×T biplot and tolerance indices (MP, GMP, and STI) can be a good way to evaluate the superiority of traits and identify tolerant genotypes, and by this way, superior genotypes with high production capacity and desirable traits can be used in drought tolerance breeding programs. Also, photosynthetic pigments and element concentrations can be a good criterion for improving grain yield, especially under stress conditions.
Article number: 22
Type of Study: Research |
Subject:
Droughts Stress
Received: 2022/03/30 | Accepted: 2022/06/14 | Published: 2023/05/28
Received: 2022/03/30 | Accepted: 2022/06/14 | Published: 2023/05/28
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