The Genomes of Mycosphaerella graminicola and M. fijiensis

2014 ◽  
pp. 123-140 ◽  
Author(s):  
Stephen B. Goodwin ◽  
Gert H. J. Kema
Keyword(s):  
Mycosphaerella Graminicola

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

Genome ◽  
2004 ◽  
Vol 47 (5) ◽  
pp. 789-794 ◽  
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.

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

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 <i>M.graminicola</i> (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 <i>Septoria tritici</i> 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.

Rapid Detection of Mycosphaerella graminicola in Wheat Using Reverse Transcription-PCR Assay

2005 ◽  
Vol 153 (11-12) ◽  
pp. 674-679 ◽  
Author(s):  
J.-R. Guo ◽  
F. Schnieder ◽  
M. Beyer ◽  
J.-A. Verreet
Keyword(s):  
Reverse Transcription ◽  
Rapid Detection ◽  
Mycosphaerella Graminicola ◽  
Pcr Assay ◽  
Reverse Transcription Pcr

Pathogenic variation in Australian isolates of Mycosphaerella graminicola

1995 ◽  
Vol 46 (5) ◽  
pp. 921 ◽  
Author(s):  
B Ballantyne ◽  
F Thomson
Keyword(s):  
New South ◽  
Severe Infection ◽  
Mycosphaerella Graminicola ◽  
Limited Disease ◽  
Sources Of Resistance ◽  
Breeding Programs ◽  
Host Pathogen Interaction ◽  
South Wales ◽  
Pathogenic Variation ◽  
Linear Modelling

Seven isolates of Mycosphaerella graminicola gave a range of infection patterns when inoculated onto 20 wheat testers in glasshouse tests. Linear modelling and the biplot technique indicated host-pathogen interaction, hence evidence for physiologic specialization. Two isolates from Western Australia (WA) gave only limited disease on the cultivar Egret which is field resistant in WA. The cvv. Heron and Robin which are related to each other and to Egret also showed limited disease with the WA isolates and with certain NSW cultures. Five New South Wales (NSW) isolates produced moderate to severe infection on this cultivar which is field susceptible in NSW. Among the bread wheats used as sources of resistance in southern NSW only one, M1696, remained healthy with all isolates; nine other lines developed little disease with most isolates but more infection with other isolates, especially two isolates isolated from the field in severe epidemics. There was agreement between replicates within and between experiments. The relevance of these findings to breeding programs is discussed.

Analysis of expressed sequence tags from the wheat leaf blotch pathogen Mycosphaerella graminicola (anamorph Septoria tritici)

2005 ◽  
Vol 42 (5) ◽  
pp. 376-389 ◽  
Author(s):  
John Keon ◽  
John Antoniw ◽  
Jason Rudd ◽  
Wendy Skinner ◽  
John Hargreaves ◽  
...  
Keyword(s):  
Expressed Sequence Tags ◽  
Mycosphaerella Graminicola ◽  
Septoria Tritici ◽  
Leaf Blotch ◽  
Wheat Leaf ◽  
Expressed Sequence
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