scholarly journals MGIDI and WAASB indices: The useful approaches for selection of salt-tolerant barley genotype at the early growth and maturity stages

2021 ◽  
Author(s):  
Alireza Pour-Aboughadareh ◽  
Sara Sanjani ◽  
Hamidreza Nikkhah Chaman-Abad ◽  
Mohammad Reza Mehrvar ◽  
Ameneh Asadi ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Growth Stage ◽  
Weighted Average ◽  
Early Growth ◽  
Stress Conditions ◽  
Physiological Traits ◽  
Saline Stress ◽  
Salt Tolerant ◽  
Early Growth Stage ◽  
Barley Genotypes

Abstract Salinity stress is one of the major limiting abiotic stresses that decrease crop production worldwide. To recommend genotypes for cultivation under saline stress conditions, comprehensive understanding of genetic basis and plant responses to this stress is need. In the present study, a total of 20 barley genotypes were investigated to isolate potential salt-tolerant genotypes at the early growth stage using hydroponic system, and adult plant under field conditions. Different growth and physiological traits including root fresh and dry weights (RFW and RDW), shoot fresh and dry weights (SFW and SDW), relative water content (RWC), membrane stability index (MSI), relative chlorophyll content (SPAD index), root and shoot Na+ (RN and SN), root and shoot K+ (RK and SK), root and shoot K+:Na+ ratios (RKN and SKN), root-to-shoot Na+ translocation (RTSN), root-to-shoot K+ translocation (RTSK), stomatal conductance (GS), transpiration rate (TE), and photosynthesis rate (PN) were measured. Barley seedling were treated with two salinity levels (0 mM NaCl (as control conditions) and 200 mM NaCl (as stress conditions)) for 30 days. Moreover, the yield performance and stability of investigated barley genotypes were evaluated across five environments during the 2018–2020 cropping seasons. Salinity stress significantly decreased growth and physiological traits in all seedling plants; however, some salt-tolerant genotypes showed the lowest reduction in measured traits. Multivariate analysis grouped measured traits and tested genotypes into different clusters. The multi-trait genotype–ideotype distance index (MGIDI) selected genotypes G12, G14, G6, G7, and G16 as the salt-tolerant barley genotypes. Considering the results of the AMMI analysis showed that grain yields of tested barley genotypes were influenced by environment (E), genotype (G) and GE interaction effects. Based on the weighted average of absolute scores of the genotype index (WAASB) and other stability statistics, G7, G8, G14, and G16 were selected as superior genotypes. Considering the outputs of MGIDI and WAASB indices revealed that three genotypes G7, G14 and G16 can be recommended as new genetic resources for improving and stabilizing grain yield in barley programs for the moderate climate and saline regions of Iran. In conclusion, our results suggest that the using MGIDI index in the early growth stage can accelerate screening nurseries in barley breeding programs.

scholarly journals Identification of salt-tolerant barley genotypes using multiple-traits index and yield performance at the early growth and maturity stages

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Alireza Pour-Aboughadareh ◽  
Sara Sanjani ◽  
Hamidreza Nikkhah-Chamanabad ◽  
Mohammad Reza Mehrvar ◽  
Ameneh Asadi ◽  
...  
Keyword(s):  
Growth Stage ◽  
Weighted Average ◽  
Early Growth ◽  
Stress Conditions ◽  
Physiological Traits ◽  
Saline Stress ◽  
Salt Tolerant ◽  
Yield Performance ◽  
Early Growth Stage ◽  
Barley Genotypes

Abstract Background Salinity is one of the major limiting abiotic stresses that decrease crop production worldwide. To recommend genotypes for cultivation under saline stress conditions, a comprehensive understanding of the genetic basis and plant responses to this stress is needed. In the present study, a total of 20 barley genotypes were investigated to identify potential salt-tolerant genotypes, both at the early growth stage using a hydroponic system, and in adult plants under field conditions. For these purposes, the multi-trait genotype-ideotype distance index (MGIDI) was used to identify salt-tolerant barley genotypes at the seedling stage, and the weighted average of absolute scores (WAASB) index was used to identify the high-yielding and stable genotypes in adult plant stage. At the early growth stage, barley seedlings were treated with two salinity levels: 0 mM NaCl (as control conditions) and 200 mM NaCl (as stress conditions) for 30 days, and during this period different growth and physiological traits were measured. Besides, the yield performance and stability of the investigated barley genotypes were evaluated across five environments during the 2018–2020 cropping seasons. Results Salinity stress significantly decreased growth and physiological traits in all seedling plants; however, some salt-tolerant genotypes showed minimal reduction in the measured traits. Multivariate analysis grouped the measured traits and genotypes into different clusters. In the early growth stage, the G12, G14, G6, G7, and G16 were selected as the most salt-tolerant genotypes using MGIDI index. In the multi-environment trials experiment, AMMI analysis showed that grain yields of the tested barley genotypes were influenced by the environment (E), genotype (G), and GE interaction. Based on the weighted average of absolute scores of the genotype index (WAASB) and other stability statistics, G7, G8, G14, and G16 were selected as superior genotypes. Conclusion Together the MGIDI and WAASB indices revealed that three genotypes—G7, G14 and G16—can be recommended as new genetic resources for improving and stabilizing grain yield in barley programs for the moderate climate and saline regions of Iran. Our results suggest that using the MGIDI index in the early growth stage can accelerate screening nurseries in barley breeding programs. Besides, the WAASB index can be used as a useful stability measurement for identify high-yielding and stable genotypes in multi-environment trials.

Studies of Pearl Millet under Salinity Stress at Early Growth Stage

2000 ◽  
Vol 3 (10) ◽  
pp. 1577-1579 ◽  
Author(s):  
Jehan Bakht ◽  
M. Banarus khan ◽  
Mohammad Shafi
Keyword(s):  
Pearl Millet ◽  
Salinity Stress ◽  
Growth Stage ◽  
Early Growth ◽  
Early Growth Stage

scholarly journals Phenotyping and Validation of Root Morphological Traits in Barley (Hordeum vulgare L.)

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1583
Author(s):  
Jidong Wang ◽  
Yinglong Chen ◽  
Yongen Zhang ◽  
Yongchun Zhang ◽  
Yuchun Ai ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Root Length ◽  
Morphological Traits ◽  
Growth Stage ◽  
Root Traits ◽  
Early Growth ◽  
Hordeum Vulgare L ◽  
Breeding Lines ◽  
Early Growth Stage ◽  
Barley Genotypes

Barley (Hordeum vulgare L.) is an important cereal crop, but its sustainable production is significantly hampered due to the presence of various edaphic stresses. Understanding the variability in root morphological traits among diverse barley genotypes is critical for selecting those with suitable root traits for breeding new cultivars better adapted to stress environments. Root morphological traits in an early growth stage (30 days after transplanting) in a panel of 189 barley genotypes (mostly advanced breeding lines) were assessed using a semi-hydroponic phenotyping platform followed by a validation experiment of eight genotypes with contrasting root systems in two soils. The phenotyping experiment showed large variation (coefficient of variation values ≥ 0.25) in 16 of 26 measured root and shoot traits. A strong correlation among most of the selected traits was identified. Principal component analysis indicated four principal components (eigenvalues >1) captured 79.5% of the total variation. Root traits, including total root length, root length at various depths, root diameter and root length ratio (top 20 cm vs. lower section), could be considered in the barley breeding programs. Consistent ranking of the selected eight genotypes based on root biomass and root length in both the semi-hydroponic system and the columns with two different soils confirmed root trait performance in different growth environments as well as the reliability of the phenotyping method. This study identified phenotypic variability in root morphological traits in barley genotypes in the early growth stage. The genotypic variability in root traits represents a basis for mapping quantitative trait loci (QTLs) and molecular markers, particularly focused on breeding lines with optimal root properties for the efficient acquisition of soil resources and adaptation to drought and other abiotic stresses.

scholarly journals Effects of salinity stress on seedling biomass, physiochemical properties and grain yield in different breeding wheat genotypes

2021 ◽  
Author(s):  
Alireza Pour-Aboghadareh ◽  
Mohammad Reza Mehrvar ◽  
Sara Sanjani ◽  
Ashkboos Amini ◽  
Hamidreza Nikkhah Chaman-Abad ◽  
...  
Keyword(s):  
Grain Yield ◽  
Salinity Stress ◽  
Growth Stage ◽  
Stability Index ◽  
Early Growth ◽  
Strongly Correlated ◽  
Early Growth Stage ◽  
Wheat Genotypes ◽  
Relative Water ◽  
Cropping Seasons

Abstract The salinity tolerance of 17 breeding wheat genotypes along with three local varieties was evaluated under control and salinity stress (160 mM NaCl) conditions. At the seedling stage, shoot and root dry weights, relative water content (RWC), membrane stability index (MSI), relative chlorophyll content (SPAD index), root and shoot Na+ (RN and SN), root and shoot K+ (RK and SK), root and shoot K+/Na+ ratios (RKN and SKN), root-to-shoot Na+ translocation (RTSN), root-to-shoot K+ translocation (RTSK), stomatal conductance (GS), transpiration rate (TE), and photosynthesis rate (PN) were measured. Moreover, the investigated genotypes were assessed in terms of grain yield across four saline regions during the 2018–2019 cropping seasons. Salinity stress caused a significant reduction in the RDW, SDW, PN, GS, TE, SK, RKN, SKN, RTSN, and RTSK, but resulted in increased RN, RK, and SN. The results of AMMI analysis of variance also indicated significant differences among test locations, genotypes, and their interaction effects. The PCA-based biplot revealed that grain yield strongly correlated with RKN and RK. Furthermore, the correlation among PN, GS, and TE traits was strong and positive and had a positive correlation with RWC, MSI, RDW, and SPAD index. Considering our results, RK and RKN were identified as useful physiological tools to screen salt tolerance at the early-growth stage. According to the ranking patterns obtained by the average sum of ranks method (ASR) and grain yield, we observed that genotype number G5 had considerable physiological potential at the early-growth stage and also responded well to soil salinity at the farm; thus this genotype can be promoted for commercial production.

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