Genetic insights into underground responses to Fusarium graminearum infection in wheat

Voss-Fels, Kai P.; Qian, Lunwen; Gabur, Iulian; Obermeier, Christian; Hickey, Lee T.; Werner, Christian R.; Kontowski, Stefan; Frisch, Matthias; Friedt, Wolfgang; Gottwald, Sven

doi:10.1038/s41598-018-31544-w

Cited by 21 publications

(14 citation statements)

References 62 publications

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“…Notably, this is not the first report of a link between root biomass and CR tolerance. A recent study in bread wheat found that genotypes with a higher total root biomass were more resistant to fungal infection [4]. This could be due to higher lignin/fiber content at the cellular level presenting a physical barrier for fungal growth and therefore providing enhanced resistance.…”

Section: Discussionmentioning

confidence: 98%

Adaptive Traits to Improve Durum Wheat Yield in Drought and Crown Rot Environments

Alahmad

Kang

Dinglasan

et al. 2020

IJMS

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Durum wheat (Triticum turgidum L. ssp. durum) production can experience significant yield losses due to crown rot (CR) disease. Losses are usually exacerbated when disease infection coincides with terminal drought. Durum wheat is very susceptible to CR, and resistant germplasm is not currently available in elite breeding pools. We hypothesize that deploying physiological traits for drought adaptation, such as optimal root system architecture to reduce water stress, might minimize losses due to CR infection. This study evaluated a subset of lines from a nested association mapping population for stay-green traits, CR incidence and yield in field experiments as well as root traits under controlled conditions. Weekly measurements of normalized difference vegetative index (NDVI) in the field were used to model canopy senescence and to determine stay-green traits for each genotype. Genome-wide association studies using DArTseq molecular markers identified quantitative trait loci (QTLs) on chromosome 6B (qCR-6B) associated with CR tolerance and stay-green. We explored the value of qCR-6B and a major QTL for root angle QTL qSRA-6A using yield datasets from six rainfed environments, including two environments with high CR disease pressure. In the absence of CR, the favorable allele for qSRA-6A provided an average yield advantage of 0.57 t·ha−1, whereas in the presence of CR, the combination of favorable alleles for both qSRA-6A and qCR-6B resulted in a yield advantage of 0.90 t·ha−1. Results of this study highlight the value of combining above- and belowground physiological traits to enhance yield potential. We anticipate that these insights will assist breeders to design improved durum varieties that mitigate production losses due to water deficit and CR.

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Section: Discussionmentioning

confidence: 98%

Adaptive Traits to Improve Durum Wheat Yield in Drought and Crown Rot Environments

Alahmad

Kang

Dinglasan

et al. 2020

IJMS

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“…Root rot of corn is caused by F. meridionale and F. boothii, and both root rot and kernel rot -by Trichoderma sp., Penicillium sp., Pyrenochaeta indica, F. moniliforme, F. graminearum and oxysporum. These examples of synergetic interactions between the agents of plant diseases, causing the diseases of whole complexes, may be found to have achieved higher prevalence than expected, and the understanding of the main mechanisms may have important consequences in the ¿ eld of plant disease epidemiology and ¿ ghting diseases [13].…”

mentioning

confidence: 99%

Strategies of decreasing harmfulness of fusariosis agents in agrophytocenoses

Schwartau¹,

Зозуля²,

Mykhalska³

et al. 2018

Agric.sci.pract.

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Infections of cultivated plants, transmitted by fusariosis agents, are among the most harmful factors for humans in grain production. Thus, there is an obvious need for effective control over harmfulness of fusariosis agents in agrophytocenoses. Summarizing scienti¿ c data on the issues of forming the strategy of decreasing harmfulness of fusariosis agents in agrocenoses. The major factors of decreasing the level of infecting cereal crops with fusarioses are genetic improvement of plants via selection of species and hybrids, resistant to infections, agrotechnical means and chemical control using modern fungicides with a high level of inhibiting the development of the agent during the whole growing season. The main attention should be paid to controlling the presence and prevalence of infections of plants by such species

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“…This could possibly be a result of the variability due to CR infection during early growth stages. However, alternative root growth patterns including higher total root biomass seem to have a reduced susceptibility to CR and therefore increased yield (Voss-Fels et al, 2018a).…”

Section: Seminal Root Angle Qtl Qsra-6a Involved In Durum Performancementioning

confidence: 99%

“…Crown rot continues to be a destructive disease globally and has been particularly damaging in Australia due to dramatic changes in cropping systems, including intensive cropping, the introduction of minimum tillage practices and a rapidly changing climate (Verrell et al, 2017;Voss-Fels et al, 2018a). Zhao et al (2017) estimated a yield reduction as a result of global warming in the major crops such as rice, wheat and maize of 3.2%, 6.0% and 7.4%, respectively, for each degree Celsius temperature increase.…”

Section: The Crown Rot Qtl Qcr-6b Is a Key Genomic Region Modulating mentioning

confidence: 99%

“…The enhanced yield under drought and CR conditions was suggested to be a result of higher root biomass and enhanced staygreen (Borrell et al, 2014a). Furthermore, it has been shown in a recent study that root biomass provides the plants with enhanced tolerance towards CR as well as to a spectrum of soil-borne disease (Voss-Fels et al, 2018a). However, the overall value of this key developmental QTL for above-and below-ground plant growth may equips plant breeders with the knowledge of these important traits in improving yield in future varieties.…”

Section: The Crown Rot Qtl Qcr-6b Is a Key Genomic Region Modulating mentioning

confidence: 99%

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Accelerating the development of durum wheat adapted to drought and crown rot conditions

Alahmad¹

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Global demand for durum wheat (Triticum turgidum L. ssp. durum) will increase with our dramatic continuous growing population. However, production is facing climatic fluctuations and evolving pests and diseases. In Australia, the industry has encountered many challenges surrounding stable and profitable production. These include the lack of reliable rainfall throughout the production regions resulting in severe droughts, and the susceptibility of durum wheat to crown rot (CR; caused predominantly by Fusarium pseudograminearum). Damage to durum wheat crops caused by CR is exacerbated by water stress. Thus far, due to the limited protection attainable by fungicide application and lack of genetic resistance in elite durum breeding germplasm, it has been recognised that breeding varieties incorporating reduced susceptibility to CR would be the most effective control measure when effectively combined with other management practices. For example, improved root system architecture holds some promise for enhancing access to water in arid and semi-arid production areas, particularly in deep soils with high water-holding capacity. This may be advantageous in CR-affected environments if it enables improved access to water that could simultaneously help to avoid drought and so reduce the impact of CR on yield. Hence, this research aimed to identify and combine multiple desirable physiological traits, or adaptive features, to provide some tolerance to CR. Firstly, to identify genetic regions influencing root growth angle (RGA) and CR tolerance, an integrated screening method was developed for phenotyping root variation and CR tolerance, along with other important traits such as leaf rust and plant height in durum wheat. The method was adapted to speed breeding and provided plant breeders with protocols and tools to apply selection in early generations of population development. Therefore, the selection will result in enriching recombinant inbred lines (RILs) with desirable alleles and reduce the number of years required to combine these traits in elite breeding populations. Secondly, a nested association mapping (NAM) population was developed within 18 months using speed breeding technology, including an F4 generation in the field. NAM population were developed by crossing eight elite lines imported from the International Centre for Agricultural Research in the Dry Areas (ICARDA) with two Australian cultivars. This population generated a significant variation for above-and below-ground traits that could be harnessed and explored using genetic mapping and breeding approaches. To identify key genomic regions associated with RGA, a subset of 393 NAM lines were phenotyped using the 'clear pot' method. Combining RGA data with 2,541 polymorphic DArTseq markers information, a major iii independent QTL (qSRA-6A) on 6A chromosome was identified. Furthermore, haplotype analysis for this QTL identified two major haplotype groups in the population, highlighting the opportunity for combining root traits with above-ground traits to better ...

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Genetic insights into underground responses to Fusarium graminearum infection in wheat

Cited by 21 publications

References 62 publications

Adaptive Traits to Improve Durum Wheat Yield in Drought and Crown Rot Environments

Adaptive Traits to Improve Durum Wheat Yield in Drought and Crown Rot Environments

Strategies of decreasing harmfulness of fusariosis agents in agrophytocenoses

Accelerating the development of durum wheat adapted to drought and crown rot conditions

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