Volume 15, Issue 46 (7-2023)
J Crop Breed 2023, 15(46): 93-103 |
Back to browse issues page
Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Qhavidel S, Mostafavi K, Pour-Aboughadareh A. (2023). Investigation of Terminal Season Drought Stress effects on Grain Yield and Some Agronomic and Physiological Traits in Promising Barley (Hordeum Vulgare L.) Genotypes. J Crop Breed. 15(46), 93-103. doi:10.61186/jcb.15.46.93
URL: http://jcb.sanru.ac.ir/article-1-1388-en.html
URL: http://jcb.sanru.ac.ir/article-1-1388-en.html
1- Department of Agriculture and Plant Breeding, Karaj Branch, Islamic Azad University, Karaj, Iran
2- Department of Agronomy and Plant Breeding, Karaj Branch, Islamic Azad University, Karaj, Iran
3- Seed and Breeding Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
2- Department of Agronomy and Plant Breeding, Karaj Branch, Islamic Azad University, Karaj, Iran
3- Seed and Breeding Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
Abstract: (1698 Views)
Extended Abstract
Introduction: Drought stress is known as one of the main factors limiting agricultural production. Investigation of the effect of drought stress on grain yield and other agronomic and physiological traits can be useful in identifying drought-tolerant cultivars. The aim objective of the present study was to study the effect of terminal drought stress on some of the agronomic and physiological characteristics in a set of promising barley lines.
Material and methods: This study was carried out at the Cereal Research Station located in Seed and Plant Improvement Institute, Karaj, Iran during 2020-2021 cropping seasons. The plant material consisted of 17 promising genotypes of barley along with a commercial cultivar (cv. Jolgeh). All genotypes were investigated in two separate experiments based on a randomized complete block design with three replications under two control and drought stress conditions.
Results: The results of combined analysis of variance showed a significant difference between control and drought stress conditions in terms of all measured traits except spike length and the number of seeds per spike. Furthermore, a significant difference was observed among the tested genotypes in terms of all measured traits except initial chlorophyll fluorescence, maximum quantum yield of PSII, and maximum primary yield of photochemistry of PSII. However, the interaction effect between drought stress conditions and genotype was only significant for the number of days to physiological maturity, grain filling period, main spike length, and chlorophyll content.
The results of principal component analysis (PCA) revealed that the first five components accounted for 84.80% of the total phenotypic variation, under drought stress condition. Considering the angle among trait-vectors indicated that some of traits such as number of days to anthesis and to physiological maturity, awn length, plant height, leaf area index, chlorophyll content, and number of seeds per spike positively correlated with grain yield in the drought stress condition. In general, our results showed that genotypes G2, G3, G6, G7, G12, and G18 were identified as the best genotypes compared with other tested genotypes.
Conclusion: According to results, genotype G7 due to its highest grain yield and ideal agronomic and physiological features can be candidates for further complementary investigations in multi-environmental trials with the aims of realization of a new commercial cultivar.
Introduction: Drought stress is known as one of the main factors limiting agricultural production. Investigation of the effect of drought stress on grain yield and other agronomic and physiological traits can be useful in identifying drought-tolerant cultivars. The aim objective of the present study was to study the effect of terminal drought stress on some of the agronomic and physiological characteristics in a set of promising barley lines.
Material and methods: This study was carried out at the Cereal Research Station located in Seed and Plant Improvement Institute, Karaj, Iran during 2020-2021 cropping seasons. The plant material consisted of 17 promising genotypes of barley along with a commercial cultivar (cv. Jolgeh). All genotypes were investigated in two separate experiments based on a randomized complete block design with three replications under two control and drought stress conditions.
Results: The results of combined analysis of variance showed a significant difference between control and drought stress conditions in terms of all measured traits except spike length and the number of seeds per spike. Furthermore, a significant difference was observed among the tested genotypes in terms of all measured traits except initial chlorophyll fluorescence, maximum quantum yield of PSII, and maximum primary yield of photochemistry of PSII. However, the interaction effect between drought stress conditions and genotype was only significant for the number of days to physiological maturity, grain filling period, main spike length, and chlorophyll content.
The results of principal component analysis (PCA) revealed that the first five components accounted for 84.80% of the total phenotypic variation, under drought stress condition. Considering the angle among trait-vectors indicated that some of traits such as number of days to anthesis and to physiological maturity, awn length, plant height, leaf area index, chlorophyll content, and number of seeds per spike positively correlated with grain yield in the drought stress condition. In general, our results showed that genotypes G2, G3, G6, G7, G12, and G18 were identified as the best genotypes compared with other tested genotypes.
Conclusion: According to results, genotype G7 due to its highest grain yield and ideal agronomic and physiological features can be candidates for further complementary investigations in multi-environmental trials with the aims of realization of a new commercial cultivar.
Keywords: Barley, Grain yield, Photosynthesis capacity, Principal component analysis, Water deficit stress
Type of Study: Research |
Subject:
اصلاح نباتات، بیومتری
Received: 2022/06/10 | Accepted: 2022/12/24
Received: 2022/06/10 | Accepted: 2022/12/24
Send email to the article author
| Rights and permissions | |
 |
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
