Inheritance and combining ability of persistence and drought recovery in smooth bromegrass (Bromus inermis L.)

Saeidnia, Fatemeh; Majidi, Mohammad Mahdi; Mirlohi, Aghafakhr; Bahrami, S

doi:10.1007/s10681-019-2500-8

Cited by 10 publications

(14 citation statements)

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“…It emphasizes the need for plant species or genotypes that can tolerate prolonged drought stress conditions (Abdollahi et al., 2019). Drought tolerance is a complex trait with low heritability; therefore, genetic improvement depends on the availability of genetic variation as well as developing appropriate selection criteria (Majidi et al., 2014; Saeidnia et al., 2019). Affordable and reliable drought indices that provide a measure of stress tolerance based on yield reduction under stress in comparison with nonstress conditions have been used for screening drought‐tolerant genotypes (Blum, 2011; Hura et al., 2007; Mitra, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

et al. 2021

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This study was performed for a better understanding of genotypic responses of a germplasm of tall fescue to different prolonged drought stresses and exogenously applied salicylic acid (SA) in terms of drought tolerance, postdrought recovery, persistence and root‐related traits. Twenty‐one diverse tall fescue genotypes were evaluated under three irrigation treatments (IT) (normal, mild and intense drought stress) and the presence of two SA concentrations (0 and 1 mM) during 2015–2017. In the fourth year (2018), irrigation was withheld in all treatments for two months in summer (severe drought) and then plants were rewatered to investigate the effect of previous treatments on the mentioned traits. Results indicated that recovery after severe drought and persistence in tall fescue depends on previous environmental conditions with clear differences in genotypic responses. Foliar application of SA improved forage production, drought tolerance, postdrought recovery and most of the root traits, while it had a negative effect on persistence and root length. Associations amongst traits under different treatments and selection of superior genotypes will be discussed.

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Section: Introductionmentioning

confidence: 99%

“…Saeidnia et al. (2019) reported that the postdrought recovery was positively correlated with establishment rate and some morphological traits (such as recovery yield and number of the stems), which can be predicted through developing an index.…”

Section: Introductionmentioning

confidence: 99%

Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

et al. 2021

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“…A moderate to high value of narrow sense heritability was reported for recovery yield (0.59) in orchardgrass and smooth bromegrass (0.69) (Pirnajmedin et al, 2018;Saeidnia et al, 2019). Saeidnia et al (2019Saeidnia et al ( , 2020 also reported the relatively high values of heritability for yield components and recovery related traits in smooth bromegrass.…”

Section: Discussionmentioning

confidence: 97%

Half‐sib mating for inheritance analysis of post‐drought recovery and productivity related traits in tall fescue

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Climate change has exacerbated the need for grass varieties that are able to not only tolerate prolonged drought stress, but also to recover well post-drought. The genetic basis of post-drought recovery related traits and their association with drought tolerance has not yet been thoroughly investigated in tall fescue (Festuca arundinacea Schreb. syn. Lolium arundinaceum). Polycross-derived half-sib families (HF) were assessed for agro-morphological traits in the field under three irrigation levels (normal, mild drought, and intense drought stresses) during 2017 and 2018. In the 3rd year (2019), irrigation was withheld for all treatments for 2 mo; after 6 wk re-watering, the families were assessed for post-drought recovery. Considerable genetic variation was observed among HF for measured traits. The results show that increased intensity of water stress had adverse effects on post-drought recovery potential and production.Moderately high values of narrow-sense heritability for yield components and recovery related traits suggest the influence of additive gene action in the expression of these traits. Significant correlation of yield productivity and recovery forage yield with morphological traits and stress tolerance index indicate that forage production and recovery potential can be predicted via developing an index. The results also indicated that the recovery rate measured in the 3rd year was positively correlated with number of stems per plant and crown diameter of previous years. Based on the general combining ability (GCA) and application of multivariate analysis, families were identified that may be useful for high-yield production and post-drought recovery potential as well as turf application.

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“…For example, some researchers stated that GCV and genetic gain through selection is higher under normal irrigation than deficit irrigation (Blum 2011;Majidi et al 2016). While others reported higher GCV and genetic advance through selection under deficit irrigation (Abtahi et al 2018;Saeidnia et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Yield Stability of Contrasting Orchardgrass (Dactylis Glomerata L.) Genotypes Over the Years and Water Regimes 

Saeidnia

Majidi

Mirlohi

et al. 2021

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Stability of combining ability and the nature and extent of genetic and genotype×environment interaction is poorly understood in orchardgrass especially under climate change conditions. In the present study, first-generation half-sib families of orchardgrass derived from the polycross of 25 parental genotypes were evaluated in the field during five years under two irrigation regimes of normal and water deficit. Considerable genotypic variation was observed among half-sib families for all of the evaluated traits, demonstrating high potential for improving these traits through half-sib mating. The effects of water deficit on dry forage yield increased from the first to fifth year and consequently declined the persistence of half-sib families. Results showed that both genetic and non-genetic gene actions played a role in the control of dry forage yield; indicating that selection based on an index would be more useful to attain genetic progress. Moreover, the estimates of narrow-sense heritability for most of the traits were higher under deficit irrigation, which is advantageous for successful selection. The stability of general combining ability, plant productivity, and drought tolerance clearly identified G4, G5, G6, and G14 as the superior and stable parental genotypes able to transmit both stability and forage productivity to their progenies.

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Inheritance and combining ability of persistence and drought recovery in smooth bromegrass (Bromus inermis L.)

Cited by 10 publications

References 45 publications

Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

Half‐sib mating for inheritance analysis of post‐drought recovery and productivity related traits in tall fescue

Yield Stability of Contrasting Orchardgrass (Dactylis Glomerata L.) Genotypes Over the Years and Water Regimes

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Inheritance and combining ability of persistence and drought recovery in smooth bromegrass (Bromus inermis L.)

Cited by 10 publications

References 45 publications

Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

Half‐sib mating for inheritance analysis of post‐drought recovery and productivity related traits in tall fescue

Yield Stability of Contrasting Orchardgrass (Dactylis Glomerata L.) Genotypes Over the Years and Water Regimes&nbsp;

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Yield Stability of Contrasting Orchardgrass (Dactylis Glomerata L.) Genotypes Over the Years and Water Regimes