scholarly journals Detection of virulence to septoria tritici blotch (STB) resistance conferred by the winter wheat cultivar Cougar in the Irish Zymoseptoria tritici population and potential implications for STB control

2021 ◽  
Author(s):  
Steven Kildea ◽  
Liam Sheppard ◽  
Mladen Cucak ◽  
Fiona Hutton
Keyword(s):  
Winter Wheat ◽  
Wheat Cultivar ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Winter Wheat Cultivar ◽  
Zymoseptoria Tritici

scholarly journals Control of Septoria tritici blotch by winter wheat cultivar mixtures: Meta-analysis of 19 years of cultivar trials

2020 ◽  
Vol 249 ◽  
pp. 107696 ◽  
Author(s):  
Rose Kristoffersen ◽  
Lise Nistrup Jørgensen ◽  
Lars Bonde Eriksen ◽  
Ghita Cordsen Nielsen ◽  
Lars Pødenphant Kiær
Keyword(s):  
Winter Wheat ◽  
Wheat Cultivar ◽  
Meta Analysis ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Winter Wheat Cultivar ◽  
Cultivar Mixtures

scholarly journals Temporal Dynamics and Spatial Variation of Azoxystrobin and Propiconazole Resistance in Zymoseptoria tritici: A Hierarchical Survey of Commercial Winter Wheat Fields in the Willamette Valley, Oregon

2017 ◽  
Vol 107 (3) ◽  
pp. 345-352 ◽  
Author(s):  
Christina H. Hagerty ◽  
Nicole P. Anderson ◽  
Christopher C. Mundt
Keyword(s):  
Winter Wheat ◽  
Spatial Variation ◽  
Fungicide Resistance ◽  
Temporal Dynamics ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Willamette Valley ◽  
Zymoseptoria Tritici ◽  
Quinone Outside Inhibitor ◽  
Inhibitor Resistance

Fungicide resistance can cause disease control failure in agricultural systems, and is particularly concerning with Zymoseptoria tritici, the causal agent of Septoria tritici blotch of wheat. In North America, the first quinone outside inhibitor resistance in Z. tritici was discovered in the Willamette Valley of Oregon in 2012, which prompted this hierarchical survey of commercial winter wheat fields to monitor azoxystrobin- and propiconazole-resistant Z. tritici. Surveys were conducted in June 2014, January 2015, May 2015, and January 2016. The survey was organized in a hierarchical scheme: regions within the Willamette Valley, fields within the region, transects within the field, and samples within the transect. Overall, frequency of azoxystrobin-resistant isolates increased from 63 to 93% from June 2014 to January 2016. Resistance to azoxystrobin increased over time even within fields receiving no strobilurin applications. Propiconazole sensitivity varied over the course of the study but, overall, did not significantly change. Sensitivity to both fungicides showed no regional aggregation within the Willamette Valley. Greater than 80% of spatial variation in fungicide sensitivity was at the smallest hierarchical scale (within the transect) of the survey for both fungicides, and the resistance phenotypes were randomly distributed within sampled fields. Results suggest a need for a better understanding of the dynamics of fungicide resistance at the landscape level.

‘GA JT141‐14E45’: A new soft red winter wheat cultivar adapted to Georgia and the U.S. Southeast region

2021 ◽  
Author(s):  
Mohamed Mergoum ◽  
Jerry W. Johnson ◽  
James W. Buck ◽  
Steve Sutton ◽  
Benjamin Lopez ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Wheat Cultivar ◽  
Winter Wheat Cultivar ◽  
Southeast Region ◽  
Soft Red Winter Wheat ◽  
Red Winter Wheat ◽  
The U.S

Effects of an intercultivaral chromosome substitution on winterhardiness and vernalization in wheat.

Genetics ◽  
1988 ◽  
Vol 119 (2) ◽  
pp. 453-456
Author(s):  
R S Zemetra ◽  
R Morris
Keyword(s):  
Winter Wheat ◽  
Growth Habit ◽  
Wheat Cultivar ◽  
Triticum Aestivum L ◽  
Segregation Ratio ◽  
Substitution Line ◽  
Winter Survival ◽  
Winter Wheat Cultivar ◽  
Vernalization Gene ◽  
Chromosome 3B

Abstract During a study on the genetic control of winterhardiness in winter wheat (Triticum aestivum L. group aestivum), a gene that affected vernalization was found on chromosome 3B in the winter wheat cultivar ;Wichita.' When chromosome 3B from Wichita was substituted into the winter wheat cultivar ;Cheyenne,' the resultant substitution line exhibited a spring growth habit. This is unusual since a cross between the cultivars Wichita and Cheyenne results in progeny that exhibit the winter growth habit. The F(2) plants from a cross of the 3B substitution line to Cheyenne, the recipient parent, segregated 3:1 for heading/no heading response in the absence of vernalization (chi(2) = 2.44). Earliness of heading appeared to be due to an additive effect of the 3B gene as shown by the segregation ratio 1:2:1 (early heading-later heading-no heading) (chi(2) = 2.74). This vernalization gene differs from previously described vernalization genes because, while dominant in a Cheyenne background, its expression is suppressed in Wichita. The gene may have an effect on winter hardiness in Wichita. In a field test for winter survival the 3B substitution line had only 5% survival, while Wichita and Cheyenne had 50 and 80% survival, respectively. No other substitution line significantly reduced winter survival. The difference between Wichita and Cheyenne in winterhardiness may be due to the vernalization gene carried on the 3B chromosome.

Accuracy of within- and among-family genomic prediction for Fusarium head blight and Septoria tritici blotch in winter wheat

2018 ◽  
Vol 132 (4) ◽  
pp. 1121-1135 ◽  
Author(s):  
Cathérine Pauline Herter ◽  
Erhard Ebmeyer ◽  
Sonja Kollers ◽  
Viktor Korzun ◽  
Tobias Würschum ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Fusarium Head Blight ◽  
Genomic Prediction ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Head Blight

scholarly journals A comparison of winter wheat cultivar rankings in groups of Polish locations

2016 ◽  
Vol 44 (4) ◽  
pp. 628-638 ◽  
Author(s):  
A. Derejko ◽  
M. Studnicki ◽  
W. Mądry ◽  
E. Gacek
Keyword(s):  
Winter Wheat ◽  
Wheat Cultivar ◽  
Winter Wheat Cultivar

scholarly journals Characterisation of an antimicrobial and phytotoxic ribonuclease secreted by the fungal wheat pathogen Zymoseptoria tritici

2017 ◽  
Author(s):  
Graeme J. Kettles ◽  
Carlos Bayon ◽  
Caroline A. Sparks ◽  
Gail Canning ◽  
Kostya Kanyuka ◽  
...  
Keyword(s):  
Expression Pattern ◽  
Effector Proteins ◽  
Yeast Cells ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
List Type ◽  
Expression Systems ◽  
Zymoseptoria Tritici ◽  
Loop Region

Abstract-The fungus Zymoseptoria tritici is the causal agent of Septoria Tritici Blotch (STB) disease of wheat leaves. Z. tritici secretes many functionally uncharacterised effector proteins during infection. Here we characterised a secreted ribonuclease (Zt6) with an unusual biphasic expression pattern.-Transient expression systems were used to characterise Zt6, and mutants thereof, in both host and non-host plants. Cell-free protein expression systems monitored impact of Zt6 protein on functional ribosomes, and in vitro assays of cells treated with recombinant Zt6 determined toxicity against bacteria, yeasts and filamentous fungi.-We demonstrated that Zt6 is a functional ribonuclease and that phytotoxicity is dependent on both the presence of a 22-amino acid N-terminal “loop” region and its catalytic activity. Zt6 selectively cleaves both plant and animal rRNA species, and is toxic to wheat, tobacco, bacterial and yeast cells but not to Z. tritici itself.-Zt6 is the first Z. tritici effector demonstrated to have a likely dual functionality. The expression pattern of Zt6 and potent toxicity towards microorganisms suggests that whilst it may contribute to the execution of wheat cell death, it is also likely to have an important secondary function in antimicrobial competition and niche protection.

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