Genetic analysis of root and physiological traits of tall fescue in association with drought stress conditions

Pirnajmedin, Fatemeh; Majidi, Mohammad Mahdi; Saeidi, Ghodratollah; Gheysari, Mahdi; Nourbakhsh, Venus; Radan, Zahra

doi:10.1007/s10681-017-1920-6

Cited by 11 publications

(8 citation statements)

References 53 publications

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“…(2013) and Pirnajmedin et al . (2017) in the study of tall fescue and Irani et al . (2015) in sainfoin ( Onobrychis viciifolia Scop) reported high heritability estimates for RWC and chlorophyll content under water deficit stress.…”

Section: Discussionmentioning

confidence: 93%

“…Bayat et al (2009) similarly reported that drought stress leads to reduced chlorophyll content. Chlorophyll content is a major character determining photosynthetic capacity in live plants and a higher chlorophyll content is associated with drought tolerance (Ebrahimiyan et al, 2013;Pirnajmedin et al, 2017). Therefore, screening genotypes for a high value of chlorophyll content may lead to increased drought tolerance (Rong Hua et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Physiological traits that are correlated with yield and drought stress can be used as secondary traits for screening drought-tolerant genotypes in coriander breeding programmes. Physiological traits such as chlorophyll a (Chla), chlorophyll b (Chlb), total chlorophyll (Tchl) content, electrolyte leakage (EL) and relative water content (RWC) are involved in drought stress injury and can be used as drought tolerance indicators (Geravandi et al ., 2011; Pirnajmedin et al ., 2017). Drought stress damages the photosynthetic apparatus and decreases chlorophyll content (Mathobo et al ., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Quantitative genetic analysis of water deficit tolerance in coriander through physiological traits

Gholizadeh

Dehghani

Khodadadi

2019

Plant Genet. Resour.

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Drought stress restricts the production of agricultural crops through morphological, physiological and biochemical changes in plants. This study explored the genetic control of physiological traits related to drought in coriander. In a diallel analysis, all six parents, their 15 F1 hybrids and 15 F2 populations were subjected to different irrigation regimes including well-watered, mild and severe water deficit stress. Drought stress decreased the relative chlorophyll content (RCC), the relative water content (RWC), chlorophyll a (Chla), chlorophyll b (Chlb), total chlorophyll (TChl) content, carotenoids (Car) and essential oil yield (EOY) in F1 and F2 generations. General combining ability (GCA) and specific combining ability effects were highly significant for all traits in F1 and F2 generations. Additive gene action was predominant for Chla, Chlb, TChl and Car under well-watered condition while non-additive gene effects were more important under mild and severe water deficit stresses in F1 and F2 generations for the above traits. Additive gene effects were more important for RCC, RWC and electrolyte leakage (EL) traits in both F1 and F2 generations under mild and severe water deficit stresses. In conclusion, the high narrow-sense heritability and significant genetic correlations between EOY and RCC, RWC and EL suggest that these traits can be used as surrogates to identify superior genotypes for arid and semi-arid regions. Also, the parental lines, P4 and P6 had the best GCA for RCC, RWC, Chla, Chlb, TChl, Car, essential oil content and EOY.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantitative genetic analysis of water deficit tolerance in coriander through physiological traits

Gholizadeh

Dehghani

Khodadadi

2019

Plant Genet. Resour.

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“…Growth and development processes are inhibited when turfgrass is exposed to drought stress. It was reported that the growth and development of axillary buds and roots of tall fescue were inhibited by drought stress [10,87,88]. The lateral spread of the turfgrass was delayed with the duration of summer dry-down [89].…”

Section: Drought Stressmentioning

confidence: 99%

Mechanisms of Environmental Stress Tolerance in Turfgrass

et al. 2020

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Turfgrasses constitute a vital part of the landscape ecological systems for sports fields, golf courses, home lawns and parks. However, turfgrass species are affected by numerous abiotic stresses include salinity, heat, cold, drought, waterlogging and heavy metals and biotic stresses such as diseases and pests. Harsh environmental conditions may result in growth inhibition, damage in cell structure and metabolic dysfunction. Hence, to survive the capricious environment, turfgrass species have evolved various adaptive strategies. For example, they can expel phytotoxic matters; increase activities of stress response related enzymes and regulate expression of the genes. Simultaneously, some phytohormones and signal molecules can be exploited to improve the stress tolerance in turfgrass. Generally, the mechanisms of the adaptive strategies are integrated but not necessarily the same. Recently, metabolomic, proteomic and transcriptomic analyses have revealed plenty of stress response related metabolites, proteins and genes in turfgrass. Therefore, the regulation mechanism of turfgrass’s response to abiotic and biotic stresses was further understood. However, the specific or broad-spectrum related genes that may improve stress tolerance remain to be further identified. Understanding stress response in turfgrass species will contribute to improve stress tolerance of turfgrass.

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“…Khalili et al (2016) pointed out that PCA was able to identify drought tolerant and high yielding genotypes in safflower over multiple environments. Other researches have also used PCA biplot to screen suitable genotypes for drought tolerance (Abtahi et al, 2017;Pirnajmedin et al, 2017). Crossing genotypes with major genetic differences may develop germplasm with desirable characteristics especially for agronomic and phenological traits.…”

Section: Discussionmentioning

confidence: 99%

Evaluating Selection Methods for Carthamus Interspecific Crosses under Different Water Conditions

et al. 2019

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Core Ideas Wild relatives of safflower are suitable source of genes for improvement of cultivated species.Single plant selection is simple and results in genetic gain in safflower interspecific hybridization under both water stress and non‐stress conditions.Indirect selection is more efficient than direct selection for tolerance to water limited conditions in safflower interspecific crosses. Wild relatives of safflower (Carthamus tinctorius L.) are a potential source of favorable genes for its further improvement through interspecific crosses. Therefore, two wild safflower species (C. palaestinus and C. oxyacanthus) were crossed with the cultivated counterpart in 2011. Three interspecific population progenies including C. palaestinus × C. tinctorius (PT), C. tinctorius × C. oxyacanthus (TO), and C. oxyacanthus × C. palaestinus (OP) were developed. Three selection methods including single plant selection (SPS), modified selected bulk (MSB) and modified bulk (MB) were applied at F3 generation in 2013. Selected lines were evaluated in F4 and F5 generations under water stress and non‐stress conditions during 2014 and 2015. The SPS and MSB methods resulted in higher genetic gain compared to MB under both moisture conditions. Even though, SPS and MSB were equally efficient in selecting better genotypes. SPS was much easier, less laborious, faster and cost‐effective method than MSB. A high percentage of agreement was observed between visual selection and selection based on actual yield only for SPS method by evaluating 2920 single plants. Capitulum diameter (CD) was a good criterion for visual selection of superior genotypes in the field condition under both moisture environments. The PT and TO lines that were produced by SPS and MSB methods showed slightly higher values for most measured traits when compared to the lines which were produced by MB selection method. The SPS‐derived lines were slightly earlier on maturity compared to the lines resulted from other selection methods.

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Genetic analysis of root and physiological traits of tall fescue in association with drought stress conditions

Cited by 11 publications

References 53 publications

Quantitative genetic analysis of water deficit tolerance in coriander through physiological traits

Quantitative genetic analysis of water deficit tolerance in coriander through physiological traits

Mechanisms of Environmental Stress Tolerance in Turfgrass

Evaluating Selection Methods for Carthamus Interspecific Crosses under Different Water Conditions

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