QTL mapping for germination of seeds obtained from previous wheat generation under drought

Czyczyło-Mysza, Ilona; Marcińska, Izabela; Skrzypek, Edyta; Cyganek, Katarzyna; Juzoń, Katarzyna; Karbarz, Małgorzata

doi:10.2478/s11535-013-0273-y

Cited by 13 publications

(12 citation statements)

References 40 publications

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“…It is not surprising that seed weight had a weak relationship with seed germination rate. Rapid germination is under physiological control unrelated to seed weight [6,13].…”

Section: Discussionmentioning

confidence: 99%

“…Recurrent selection in self-pollinated species, however, may be constrained by the number of hand emasculations and pollinations that need to be made in order to have enough plant materials for selection to be effective. There is evidence that indicates that seed germination is a quantitative trait [13]. When large numbers of genes are segregating for a trait, the frequency of obtaining a specific genotype in a population is low.…”

Section: Introductionmentioning

confidence: 99%

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Seed Germination and Early Seedling Growth of Barley at Negative Water Potentials

Springer

Mornhinweg

2019

Agronomy

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The impacts of climate change may increase the duration and frequency of droughts, which would have deleterious effects on crop establishment. The objectives of this study were to determine the effects of moisture stress on seed germination and seedling growth of six winter barley (Hordeum vulgare) lines and discuss how the data are used to select plant materials for rapid germination. Twenty-five seeds of each line were germinated in water of potentials of −2.0, −1.6, −1.2, −0.8, −0.4, and 0 MPa for 4- and 7-days. The experimental design was a factorial arrangement of treatments (barley lines and water potential treatments) in a randomized block replicated four times and repeated twice. The 4- and 7-day percentage seed germination varied with line (p < 0.01), water potential treatment (p < 0.01), and line × treatment interactions (p < 0.01). The seed germination rate varied with water potential treatment (p < 0.01), and line × treatment interactions (p < 0.01). The data indicated that enough variation was present to effectively select and breed cultivars for improved germination at a negative water potential. Studying seed germination under moisture stress is the first step for developing an effected selection pressure for identifying plant materials with rapid seed germination.

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“…It is not surprising that seed weight had a weak relationship with seed germination rate. Rapid germination is under physiological control unrelated to seed weight [6,13].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seed Germination and Early Seedling Growth of Barley at Negative Water Potentials

Springer

Mornhinweg

2019

Agronomy

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“…Such analysis helps to define the QTL of the most sensitive trait and/or stage to drought stress, and whether there are shared drought tolerance QTLs among the developmental stages with traits and with final yield (Table 1). Despite this, drought stress has an impact on seed germination, vigor and seedling development [158], few studies identified the genetic basis of drought tolerance at early vegetative developmental stages using QTL-mapping population in wheat [159] and barley [160]. Also, there has been a little success in identifying the genetic basis of drought stress during the highly sensitive reproductive phase for determining the final grain [161].…”

Section: Genetic Landscape Of Drought Tolerance In Wheat and Barleymentioning

confidence: 99%

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

Sallam

Alqudah

Dawood

et al. 2019

IJMS

428

312

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Climate change is a major threat to most of the agricultural crops grown in tropical and sub-tropical areas globally. Drought stress is one of the consequences of climate change that has a negative impact on crop growth and yield. In the past, many simulation models were proposed to predict climate change and drought occurrences, and it is extremely important to improve essential crops to meet the challenges of drought stress which limits crop productivity and production. Wheat and barley are among the most common and widely used crops due to their economic and social values. Many parts of the world depend on these two crops for food and feed, and both crops are vulnerable to drought stress. Improving drought stress tolerance is a very challenging task for wheat and barley researchers and more research is needed to better understand this stress. The progress made in understanding drought tolerance is due to advances in three main research areas: physiology, breeding, and genetic research. The physiology research focused on the physiological and biochemical metabolic pathways that plants use when exposed to drought stress. New wheat and barley genotypes having a high degree of drought tolerance are produced through breeding by making crosses from promising drought-tolerant genotypes and selecting among their progeny. Also, identifying genes contributing to drought tolerance is very important. Previous studies showed that drought tolerance is a polygenic trait and genetic constitution will help to dissect the gene network(s) controlling drought tolerance. This review explores the recent advances in these three research areas to improve drought tolerance in wheat and barley.

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“…29 SeriM82 × HartogDH184RGA, TRN114Czyczyło-Mysza et al . 75 Chinese spring × SQ1DH90RDW, TRL1817Ehdaie et al . 76 Iran #49 × Yecora RojoRIL168DRW, LRL, RPR, RSR,SRW, TRL126Guo et al .…”

Section: Introductionunclassified

Discovering consensus genomic regions in wheat for root-related traits by QTL meta-analysis

Soriano

Álvaro

2019

Sci Rep

108

123

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Root system architecture is crucial for wheat adaptation to drought stress, but phenotyping for root traits in breeding programmes is difficult and time-consuming owing to the belowground characteristics of the system. Identifying quantitative trait loci (QTLs) and linked molecular markers and using marker-assisted selection is an efficient way to increase selection efficiency and boost genetic gains in breeding programmes. Hundreds of QTLs have been identified for different root traits in the last few years. In the current study, consensus QTL regions were identified through QTL meta-analysis. First, a consensus map comprising 7352 markers was constructed. For the meta-analysis, 754 QTLs were retrieved from the literature and 634 of them were projected onto the consensus map. Meta-analysis grouped 557 QTLs in 94 consensus QTL regions, or meta-QTLs (MQTLs), and 18 QTLs remained as singletons. The recently published genome sequence of wheat was used to search for gene models within the MQTL peaks. As a result, gene models for 68 of the 94 Root_MQTLs were found, 35 of them related to root architecture and/or drought stress response. This work will facilitate QTL cloning and pyramiding to develop new cultivars with specific root architecture for coping with environmental constraints.

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QTL mapping for germination of seeds obtained from previous wheat generation under drought

Cited by 13 publications

References 40 publications

Seed Germination and Early Seedling Growth of Barley at Negative Water Potentials

Seed Germination and Early Seedling Growth of Barley at Negative Water Potentials

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

Discovering consensus genomic regions in wheat for root-related traits by QTL meta-analysis

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