Root and shoot characteristics as selection criteria for drought tolerance in bread wheat (&lt;i&gt;Triticum aestivum&lt;/i&gt; L.) at seedling stage under tropical environment

Kimurto, P.K.; Kinyua, M. G.; Birech, Rhoda; Korir, PC; Njoka, E. M.

doi:10.4314/dai.v17i1.15692

Cited by 4 publications

(4 citation statements)

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“…Additionally, a study carried out by Tuberosa et al (2002 b ) on a maize mapping population provided evidence of a noticeable overlap of QTLs for seminal root traits in hydroponics with QTLs for grain yield under well‐watered and water‐stressed field conditions. In wheat, the root response to drought has been studied by Kimurto et al (2005) and by Ito et al (2006). In both cases, differential responses to water deficit were observed for root depth, volume of soil explored, soil root density and relative rate of elongation of lateral roots.…”

Section: Discussionmentioning

confidence: 99%

“…Among the morphophysiological traits that have been shown to influence the adaptive response of durum wheat to drought (Robertson et al , 1979; Jaradat & Duwayri, 1981; Jarrah & Geng, 1998; Araus et al , 2002, 2003 a , b ; Reynolds et al , 2007), a number of these have been suggested as potentially useful for breeding purposes (Slafer et al , 2005; Ferrio et al , 2007; Marti et al , 2007; Tambussi et al , 2007). In this respect, Kimurto et al (2005) reported that water stress at seedling stage in wheat induced deeper roots and a larger root surface area at the expense of shoot growth. Additionally, Ito et al (2006) speculated that a moderate soil drying could accelerate the elongation of some lateral roots.…”

Section: Introductionmentioning

confidence: 99%

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Genetic dissection of seminal root architecture in elite durum wheat germplasm

Sanguineti

Maccaferri

et al. 2007

Annals of Applied Biology

124

114

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Although root architecture has been shown to play an important role in crop performance, particularly under drought conditions, no information is available on the genetic control of root traits in durum wheat, a crop largely grown in rainfed areas with low rainfall. In our study, a panel of 57 elite durum wheat accessions were evaluated under controlled conditions for root and shoot traits at the seedling stage. Significant genetic variability was detected for all the root and shoot traits that were investigated. Correlation analysis suggested that root and shoot features were only partially controlled by common sets of genes. The high linkage disequilibrium (up to 5 cM) present in the germplasm collection herein considered allowed us to use simple sequence repeat-based association mapping to identify chromosome regions with significant effects on the investigated traits. In total, 15 chromosome regions showed significant effects on one or more root architectural features. A number of these regions also influenced shoot traits and, in some cases, plant height measured in field conditions. Major effects were detected on chromosome arms 2AL (at Xgwm294), 7AL (at Xcfa2257 and Xgwm332) and 7BL (at Xgwm577 and Xcfa2040). The accessions with the most remarkable differences in root features will provide a valuable opportunity to assemble durum wheat mapping populations well suited for ascertaining the effects of root architecture on water use efficiency and grain yield.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic dissection of seminal root architecture in elite durum wheat germplasm

Sanguineti

Maccaferri

et al. 2007

Annals of Applied Biology

124

114

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“…Heterogeneity in soil structure and composition hinders the acquisition of accurate values for root features in field-grown plants. As an alternative to root phenotyping in field experiments, a number of studies have measured roots in plants grown under controlled conditions (Arihara and Crosbie, 1982 ; Price et al, 1997a , 2002b , c ; Landi et al, 1998 , 2001a ; Tuberosa et al, 2002b ; de Dorlodot et al, 2005 , 2007 ; Kimurto et al, 2005 ; Zhu et al, 2006 , 2011 ; Hochholdinger and Tuberosa, 2009 ; Zaman-Allah et al, 2011a ; Ren et al, 2012 ). This allows more rapid and accurate analysis of root features.…”

Section: Which Traits Should Be Targeted?mentioning

confidence: 99%

Phenotyping for drought tolerance of crops in the genomics era

2012

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Improving crops yield under water-limited conditions is the most daunting challenge faced by breeders. To this end, accurate, relevant phenotyping plays an increasingly pivotal role for the selection of drought-resilient genotypes and, more in general, for a meaningful dissection of the quantitative genetic landscape that underscores the adaptive response of crops to drought. A major and universally recognized obstacle to a more effective translation of the results produced by drought-related studies into improved cultivars is the difficulty in properly phenotyping in a high-throughput fashion in order to identify the quantitative trait loci that govern yield and related traits across different water regimes. This review provides basic principles and a broad set of references useful for the management of phenotyping practices for the study and genetic dissection of drought tolerance and, ultimately, for the release of drought-tolerant cultivars.

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“…Nevertheless, drought stress at the wheat seedling stage affects architecture of seminal roots (Sanguineti et al) [48], whose early growth may play a role in plant response to future drought stress events. A low water supply to wheat seedlings has been shown to result in a lower root depth and surface area [49] [Kimurto et al], and it has been discussed in terms of the possible modification of tillering [50] [ Hyles et al] and, therefore, yield. In wheat seedlings grown in hydroponic conditions, QTLs for root dry weight were linked to QTLs for nitrogen uptake; the positive correlation and genetic linkage for the traits between the hydroponic screen and field trials demonstrated that shoot and root early vigor correlates with a better nitrogen uptake capacity [51] and that this also held if this character is phenotyped in simplified soil-less systems.…”

Section: Discussionmentioning

confidence: 99%

Phenotyping Seedling Root Biometry of Two Contrasting Bread Wheat Cultivars under Nutrient Deficiency and Drought Stress

Rossi,

Bochicchio,

Labella

et al. 2024

Agronomy

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Roots play a key role in withstanding wheat abiotic stress. In this work, we phenotyped seedling root morphology of two semi-dwarf bread wheat cultivars, the Chinese cv Lankaodali and the Italian cv Rebelde, under the hypothesis that these two genotypes have contrasting root traits and could be used as donors in breeding programs. Root development was compared in a semi-hydroponic screening, where full-strength (FS) vs. half-strength (HS) complete Hoagland’s solution represented high and moderate nutrient availability, and a screening comparing HS solution with tap water corresponding to a condition of nutrient starvation. Genotypes were further compared in soil under full watering (100% of field capacity) vs. drought stress (50% of field capacity). Lankaodali outperformed Rebelde by producing 50% more leaf mass and 70% more root mass in FS solution, 125% more leaf mass and 106% more root mass in HS solution, and 65% more leaf mass and 36% more root mass under nutrient starvation. This cv also showed a positive correlation between leaf mass and root length and mass (between r = 0.82–0.9 and r = 0.83–0.87, respectively, p < 0.05). In the soil screening experiment, Lankaodali produced more biomass than Rebelde regardless of water availability, 48% more leaf mass, 32% more root mass, and 31% more absolute rhizosheath mass (average across water availability treatments). Lankaodali proved to be more responsive than Rebelde to both water and nutrient availability. High values of broad-sense heritability—ranging between 0.80 for root mass and 0.90 for length in a hydroponic screen and 0.85 for rhizosheath size in soil—indicate that these traits could be useful for breeding.

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Root and shoot characteristics as selection criteria for drought tolerance in bread wheat (<i>Triticum aestivum</i> L.) at seedling stage under tropical environment

Cited by 4 publications

References 0 publications

Genetic dissection of seminal root architecture in elite durum wheat germplasm

Genetic dissection of seminal root architecture in elite durum wheat germplasm

Phenotyping for drought tolerance of crops in the genomics era

Phenotyping Seedling Root Biometry of Two Contrasting Bread Wheat Cultivars under Nutrient Deficiency and Drought Stress

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