The teleomorph stage, Mycosphaerella graminicola, in epidemics of septoria tritici blotch on winter wheat in the UK

The aim of the work was to study an occurrence and intensity of septoria tritici blotch on wheat in different regions of Poland as well as reaction of winter wheat cultivars and breeding lines to infection by Mycosphaerella graminicola (Fuckel) Schroeter (an. Septoria tritici ( Rob. ex Desm .) under field conditions. Observation conducted during 1994-1996 indicated on occurrence of septoria tritici blotch each year and on important infection degree of winter wheat by Mycosphaerella gruminicola in some regions of the country. The highest infection was noted in 1995 and the lowest in 1994. Infection degree for majority of cultivars was quite high. Some cultivars and lines were characterized by very high infection. Among them were the old (Kujawianka Więcławska and Wysokolitewka Sztywnosłoma) and the newest (Tercja) cultivars. On some old cultivars (Leszczyńska Wczesna and Żelazna) even no traces of infection were observed although favourable weather condition existance and the presence of neighbourhood diseased plants. Field observation of cultivars and breeding lines showed different reaction of tested wheat genotypes to Mycosphaerella graminicola infection.

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Pyraclostrobin reduces germ tube growth of QoI-resistant Mycosphaerella graminicola pycnidiospores and the severity of septoria tritici blotch on winter wheat

Plant Pathology ◽

10.1111/j.1365-3059.2010.02348.x ◽

2010 ◽

Vol 59 (6) ◽

pp. 1091-1098 ◽

Cited By ~ 16

Author(s):

S. Kildea ◽

B. Dunne ◽

E. Mullins ◽

L. R. Cooke ◽

P. C. Mercer ◽

...

Keyword(s):

Winter Wheat ◽

Germ Tube ◽

Mycosphaerella Graminicola ◽

Tube Growth ◽

Septoria Tritici Blotch ◽

Septoria Tritici ◽

Germ Tube Growth

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Microsatellite markers provide evidence for sexual reproduction of Mycosphaerella graminicola in Saskatchewan

Genome ◽

10.1139/g04-036 ◽

2004 ◽

Vol 47 (5) ◽

pp. 789-794 ◽

Cited By ~ 20

Author(s):

M Razavi ◽

G R Hughes

Keyword(s):

Genetic Diversity ◽

Genetic Variability ◽

Sexual Reproduction ◽

Primary Source ◽

Mycosphaerella Graminicola ◽

Septoria Tritici Blotch ◽

Septoria Tritici ◽

Allelic Series ◽

Evolutionary Potential ◽

Wheat Field

This study examined the genetic structure of a Saskatchewan population of Mycosphaerella graminicola, cause of the foliar disease Septoria tritici blotch of wheat. Such knowledge is valuable for understanding the evolutionary potential of this pathogen and for developing control strategies based on host resistance. Nine pairs of single-locus microsatellite primers were used to analyze the genomic DNA of 90 isolates of M. graminicola that were collected using a hierarchical sampling procedure from different locations, leaves, and lesions within a wheat field near Saskatoon. Allelic series at eight different loci were detected. The number of alleles per locus ranged from one to five with an average of three alleles per locus. Genetic diversity values ranged from 0.04 to 0.67. Partitioning the total genetic variability into within- and among-location components revealed that 88% of the genetic variability occurred within locations, i.e., within areas of 1 m2, but relatively little variability occurred among locations. Low variability among locations and a high degree of variability within locations would result if the primary source of inoculum was airborne ascospores, which would be dispersed uniformly within the field. This finding was confirmed by gametic disequilibrium analysis and suggests that the sexual reproduction of M. graminicola occurs in Saskatchewan.Key words: Mycosphaerella graminicola, SSR markers, sexual reproduction, genetic diversity.

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

Theoretical and Applied Genetics ◽

10.1007/s00122-018-3264-6 ◽

2018 ◽

Vol 132 (4) ◽

pp. 1121-1135 ◽

Cited By ~ 14

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

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Reaction of winter wheat genotypes to infection by Mycosphaerella graminicola(Fuckel) Schroeter

Acta Agrobotanica ◽

10.5586/aa.2002.022 ◽

2013 ◽

Vol 55 (1) ◽

pp. 233-246

Author(s):

Ewa Mirzwa-Mróz ◽

Czesław Zamorski

Keyword(s):

Winter Wheat ◽

Broad Spectrum ◽

Mycosphaerella Graminicola ◽

Wheat Breeding ◽

Septoria Tritici ◽

Wheat Cultivars ◽

Breeding Lines ◽

Wheat Genotypes ◽

Winter Wheat Cultivars

The response of Polish winter wheat genotypes to M.graminicola (preliminary experiments and cultivar collections) was observed in different regions of Poland. Observations were carried out in 1995-1999. The winter wheat genotypes showed a broad spectrum of reaction to this pathogen. Between 1997 and 1999 the highest degree of infection on winter wheat breeding lines was noted in Kończewice. During this time no genotypes free from infection were observed (preliminary breeding experiments). Cultivars with no symptoms of Septoria tritici blotch (Leszczyńska Wczesna and Żelazna) were found among old genotypes in Słupia Wielka only in earlier experiments (1995-1996). In the years 1997-1999 the winter wheat cultivars were classified into groups on the basis of their response to the pathogen. The degree of infection for the majority cultivars was quite high.

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Precision phenotyping reveals novel loci for quantitative resistance to septoria tritici blotch in European winter wheat

10.1101/502260 ◽

2018 ◽

Cited By ~ 1

Author(s):

Steven Yates ◽

Alexey Mikaberidze ◽

Simon Krattinger ◽

Michael Abrouk ◽

Andreas Hund ◽

...

Keyword(s):

Disease Resistance ◽

Winter Wheat ◽

High Throughput ◽

Quantitative Resistance ◽

Small Chromosome ◽

Snp Markers ◽

Automated Image Analysis ◽

Septoria Tritici Blotch ◽

Septoria Tritici ◽

Limiting Factor

Accurate, high-throughput phenotyping for quantitative traits is the limiting factor for progress in plant breeding. We developed automated image analysis to measure quantitative resistance to septoria tritici blotch (STB), a globally important wheat disease, enabling identification of small chromosome intervals containing plausible candidate genes for STB resistance. 335 winter wheat cultivars were included in a replicated field experiment that experienced natural epidemic development by a highly diverse but fungicide-resistant pathogen population. More than 5.4 million automatically generated phenotypes were associated with 13,648 SNP markers to perform a GWAS. We identified 26 chromosome intervals explaining 1.9-10.6% of the variance associated with four resistance traits. Seventeen of the intervals were less than 5 Mbp in size and encoded only 173 genes, including many genes associated with disease resistance. Five intervals contained four or fewer genes, providing high priority targets for functional validation. Ten chromosome intervals were not previously associated with STB resistance. Our experiment illustrates how high-throughput automated phenotyping can accelerate breeding for quantitative disease resistance. The SNP markers associated with these chromosome intervals can be used to recombine different forms of quantitative STB resistance that are likely to be more durable than pyramids of major resistance genes.

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