Occurrence of barley pathogenic<i>Pyrenophora</i>species and their mating types in Hungary

Ficsor, A.; Bakonyi, J.; Csósz, M.; Tomcsányi, A.; Varga, János; Töth, Beáta

doi:10.1556/crc.2014.0014

Cited by 7 publications

(9 citation statements)

References 20 publications

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“…Sexual outcrossing may generate new pathogen genotypes with increased genetic diversity and rapid adaptability to host genotypes with different levels of disease resistance [79]. It was demonstrated that the Hungarian Ptt population is genetically diverse, and both mating types are common in both commercial and experimental fields [51,52]. Perhaps sexual reproduction and the diverse collections of breeding lines/cultivars with variable resistance against Ptt have contributed to a diverse pathogen micro-population at the sampling sites.…”

Section: Discussionmentioning

confidence: 99%

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Virulence Spectra of Hungarian Pyrenophora teres f. teres Isolates Collected from Experimental Fields Show Continuous Variation without Specific Isolate × Barley Differential Interactions

Bakonyi,

Seress,

Nagy

et al. 2024

JoF

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Pyrenophora teres f. teres (Ptt), the causal agent of net form net blotch (NFNB) disease, is an important and widespread pathogen of barley. This study aimed to quantify and characterize the virulence of Ptt isolates collected from experimental fields of barley in Hungary. Infection responses across 20 barley differentials were obtained from seedling assays of 34 Ptt isolates collected from three Hungarian breeding stations between 2008 and 2018. Twenty-eight Ptt pathotypes were identified. Correspondence analysis followed by hierarchical clustering on the principal components and host-by-pathogen GGE biplots suggested a continuous range of virulence and an absence of specific isolate × barley differential interactions. The isolates were classified into four isolate groups (IG) using agglomerative hierarchical clustering. One IG could be distinguished from other IGs based on avirulence/virulence on one to five barley differentials. Several barley differentials expressed strong resistance against multiple Ptt isolates and may be useful in the development of NFNB-resistant barley cultivars in Hungary. Our results emphasize that the previously developed international barley differential set needs to be improved and adapted to the Hungarian Ptt population. This is the first report on the pathogenic variations of Ptt in Hungary.

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Section: Discussionmentioning

confidence: 99%

“…The fungus has also been identified in wheat in Hungary [ 50 ]. A survey from 2006 to 2010 confirmed the abundance and high genotypic diversity of Ptt in both commercial and experimental fields of barley and wheat throughout Hungary [ 51 , 52 ].…”

Section: Introductionmentioning

confidence: 99%

Virulence Spectra of Hungarian Pyrenophora teres f. teres Isolates Collected from Experimental Fields Show Continuous Variation without Specific Isolate × Barley Differential Interactions

Bakonyi,

Seress,

Nagy

et al. 2024

JoF

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“…The number of 39 reliable ISSR bands, 18 of which (46.15%) were polymorphic, was observed using eight primers (Bayraktar & Akan, 2012). Ficsor et al (2014) used RAPD analysis to assess genetic diversity of the 68 Ptt isolates, and 171 (91%) polymorphic and 17 (9%) monomorphic DNA fragments were observed. The mean number of amplicons per locus was 1.9.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity of Iranian populations of Pyrenophora graminea, the causal agent of leaf stripe disease on barley

Dokhanchi

Arzanlou

Abed-Ashtiani

2022

Journal of Phytopathology

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Leaf stripe disease caused by Pyrenophora graminea is an economically significant disease of cultivated barley worldwide, including Iran. Considering economic impact of this disease on barley industry in Iran, in this study genetic diversity of P. graminea populations mainly collected from barley (229 isolates) in different regions of East Azerbaijan Province was examined using ISSR and RAPD molecular markers. The average polymorphic information content (PIC) values for ISSR and RAPD were 0.28 in both markers, and a significant correlation was observed between ISSR and RAPD data (r = .78, p < .05). No clear clustering was found within P. graminea populations in relation to their geographical origins. Applying the unweighted pair group method with arithmetic mean (UPGMA) procedure and principal coordinates analysis (PCoA) revealed no obvious clustering of isolates based on geographic region. Totally, gene diversity of 0.2 was noticed among P. graminea isolates. High level of genetic differentiation (PhiPT = 0.257; p ≤ .001), with 74% of the genetic variation occurring within populations and 26% occurring among populations, indicated the existence of population differentiation. In addition, a moderate amount of gene flow (Nm = 1.1985) was found between populations. Information obtained from this study may be beneficial to design and improve management strategies such as breeding resistant barley varieties to leaf stripe disease.

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“…Mating‐types ratio of almost 1:1 was also observed in P. teres f. maculata and P. teres f. teres populations from Australian barley fields (Mclean, Keiper, et al., 2010), indicating the feasibility of sexual recombination. Ficsor et al., (2014) showed that in Hungarian populations of P. teres f. teres , idiomorphs of both mating types seemed to have similar frequencies which should develop the potency of sexual reproduction. In western Canada, no significant deviation from the expected 1:1 MAT1‐1 : MAT1‐2 ratio for either form of P. teres was observed in each of the regions tested (Akhavan et al., 2015).…”

Section: Discussionmentioning

confidence: 99%

Sexual recombination and genetic diversity in Iranian populations of Pyrenophora teres

Dokhanchi

Arzanlou

Abed-Ashtiani

2021

Journal of Phytopathology

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Pyrenophora teres is an economically important pathogen of barley worldwide causing net blotch diseases. In this study, the frequency and mating-type alleles's distribution as well as genetic diversity of P. teres were assessed on micro-spatial scale and also on macro-geographical scale to find out whether a sexual cycle is possible within its Iranian populations. A multiplex PCR assay was developed for simultaneous identification and recognition of P. teres f. teres and P. teres f. maculata and to screen their mating-type alleles. 118 isolates of P. teres were procured from barley fields of East Azerbaijan province during 2017-2018. Among 89 isolates of P. teres f. teres examined, 39 isolates were found as MAT1-1 and 50 isolates were found to be MAT1-2.Among 29 isolates of P. teres f. maculata examined, 17 isolates were found as MAT1-1 and 12 isolates were found to be MAT1-2 with the dominancy belonging to MAT1-1.Nearly same mating-type alleles distribution within and between various populations of P. teres f. teres (1:1 ratio; χ 2 = 1.36) and P. teres f. maculata (1:1 ratio; χ 2 = 0.862) was observed. Genetic diversity assessment of 118 P. teres isolates was carried out through inter-simple sequence repeat (ISSR) analysis and results revealed that there was 70.83% and 63.89% polymorphism among the isolates of P. teres f. teres and P. teres f. maculata, respectively. No relation was observed between the isolates and their mating as well as geographical type. Among collected isolates (89 P. teres f. teres and 29 P. teres f. maculata isolates), the gene diversity was generally similar (h = 0.280 and h = 0.238 for P. teres f. teres and P. teres f. maculata, respectively). Based on our findings and referring to the prior data on the structure of P. teres population, we conclude that in the majority of tested areas, this fungal species might have the potential to undergo regular sexual recombination cycles.

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Occurrence of barley pathogenicPyrenophoraspecies and their mating types in Hungary

Cited by 7 publications

References 20 publications

Virulence Spectra of Hungarian Pyrenophora teres f. teres Isolates Collected from Experimental Fields Show Continuous Variation without Specific Isolate × Barley Differential Interactions

Virulence Spectra of Hungarian Pyrenophora teres f. teres Isolates Collected from Experimental Fields Show Continuous Variation without Specific Isolate × Barley Differential Interactions

Genetic diversity of Iranian populations of Pyrenophora graminea, the causal agent of leaf stripe disease on barley

Sexual recombination and genetic diversity in Iranian populations of Pyrenophora teres

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