Virulence frequency to powdery mildew resistances in winter barley cultivars

Dreiseitl, Antonín

doi:10.17221/39/2008-cjgpb

Cited by 28 publications

(31 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Their resistance was fully effective and probably different from Mlo, although it was not known whether all the genotypes carried one common resistance or whether each contained a different resistance. In 2008 the first virulent isolates on Kangoo were obtained (Dreiseitl 2008). Some of these isolates with new virulences were used in tests of 22 out of the 29 fully resistant spring barley genotypes.…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, after detecting the first isolate with a new virulence to the resistance of Laverda in 2009 (Dreiseitl 2008(Dreiseitl , 2011d 15 fully resistant genotypes of winter barley were tested using this new pathotype. Eleven of the 15 genotypes (including some varieties used in this report) possessed identical, novel resistances that were characterized according to their compatible reaction to pathotypes with new virulences.…”

Section: Discussionmentioning

confidence: 99%

“…Conidia from each singlespore colony were sucked into a replaceable tip of a varipipette AW 1000 and then blown off the tip into a micro-settling tower using a 10 ml syringe. Further details of the method used are described in Dreiseitl (2008). By this way dishes with leaf seg- (Table 2).…”

Section: Collection Of Isolatesmentioning

confidence: 99%

See 2 more Smart Citations

Rare virulences of barley powdery mildew found in aerial populations in the Czech Republic from 2009 to 2014

Dreiseitl¹

2015

Czech J. Genet. Plant Breed.

Self Cite

View full text Add to dashboard Cite

In breeding plants for resistance to disease pathogens major genes are often used. They mostly confer a resistance, which can be overcome by a corresponding pathogen virulence specific to the resistance conferred by that gene. Therefore, monitoring of new virulences in the pathogen population is an integral part of both the study of resistance and practical breeding. The aim of this paper is to present the detection of rare virulences that have been found in aerial populations of Blumeria graminis f.sp. hordei collected in the Czech Republic during the last six years. In total, 822 random isolates originating from cultivated spring and winter barley fields were evaluated on 37 differential varieties and 12 isolates carrying rare virulences were found. At least four virulences to resistances in Laverda, Psaknon, Venezia and SJ048311 were novel. In contrast, four rare isolates avirulent to the resistance Ha were also found. No isolate avirulent to resistances Ra, HH (a8) and Lo was detected. Monitoring of new virulences allows the selection of resistant donors for breeding new varieties and the identification of new resistances.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Rare virulences of barley powdery mildew found in aerial populations in the Czech Republic from 2009 to 2014

Dreiseitl¹

2015

Czech J. Genet. Plant Breed.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In 2008, the powdery mildew pathogen population was studied (Dreiseitl 2008) and the virulence frequency on resistance genes carried by winter barley cultivars was assessed. Furthermore, some spring barley genotypes were used, including cv.…”

Section: Discussionmentioning

confidence: 99%

Frequency of powdery mildew resistances in spring barley cultivars in Czech variety trials

Dreiseitl¹

2012

Plant Prot. Sci.

Self Cite

View full text Add to dashboard Cite

Dreiseitl A. (2012): Frequency of powdery mildew resistances in spring barley cultivars in Czech variety trials. Plant Protect. Sci., 48: 17-20.In 2006-2010, resistance to the powdery mildew pathogen was studied in 277 spring barley cultivars. They were represented by 54 cultivars in Czech official variety trials, of which 42 were foreign, and 223 cultivars in variety trials conducted by domestic breeding companies in that period. Sixty-eight domestic cultivars (28.8%) exhibited heterogeneity in the examined trait, i.e. they were composed of lines with different resistances to powdery mildew. Thirteen known resistances were identified (Ab, Ar, HH, La, Ly, Mlo, Ri, Ro, Ru, Sp, St, Tu2 and We). The most frequent resistance was Mlo detected in 160 homogeneous cultivars (= 76.6%). The newly described resistance Ro was found in 13 cultivars. Frequency of other resistances was low (maximally 2.4%). Unknown resistances were found in 16 cultivars, in five of which they were effective to all used pathotypes of the pathogen. Research on cultivars possessing unknown resistances and registered heterogeneous cultivars continues.

show abstract

“…For instance, the gene mlo confers full varietal resistance, whereas the gene Mla8 is totally ineffective to the pathogen population (Dreiseitl 2004) and is present even in most susceptible varieties (Dreiseitl 2007b). The effectiveness of individual resistance genes or their combinations can evaluated according to the infection or resistance of varieties in the field (Dreiseitl 2003(Dreiseitl , 2007c or determining frequencies of corresponding virulences in the pathogen population (Hovmøller et al 2000;Dreiseitl et al 2006;Dreiseitl 2008). Identifying resistance genes, determining their actual effectiveness in the field and assessing frequencies of corresponding virulences provide comprehensive information which, together with data on distribution of varieties with given resistance genes, can predict the effectiveness of the corresponding resistance.…”

Section: Introductionmentioning

confidence: 99%

Postulation of resistance genes to barley diseases in heterogeneous varieties

Dreiseitl

2011

Biologia

View full text Add to dashboard Cite

Resistance to causal agents of diseases is an important varietal characteristic that influences the management practice of crop plants and thus production costs of commodities. At present, almost all European barley varieties possess at least one major gene for resistance to powdery mildew. After hybridizing selected parental varieties, resistance genes often segregate in subsequent generations and, therefore, some varieties comprise lines that differ in the number or combinations of resistance genes. The objective of this research was to describe the various methods available for postulating resistance genes to pathogens in heterogeneous varieties using resistance to powdery mildew of barley as an example. Four spring barleys ('Orbit', 'Malva', 'Tocada' and CLE 233), and a six-row variety of winter barley, F 12872, were screened. For postulating resistance genes, several testing procedures and many Blumeria graminis f.sp. hordei isolates were used. Minimum amounts of seed were determined and different methods of obtaining homogeneous seed samples from heterogeneous varieties were compared. It was found that 'Orbit' and 'Malva' are composed of three and 'Tocada', CLE 233 and F 12872 of two lines with different resistances to powdery mildew. Problems of postulating resistance genes in heterogeneous varieties and the advantages of testing leaf segments instead of young plants are discussed.

show abstract

Virulence frequency to powdery mildew resistances in winter barley cultivars

Cited by 28 publications

References 19 publications

Rare virulences of barley powdery mildew found in aerial populations in the Czech Republic from 2009 to 2014

Rare virulences of barley powdery mildew found in aerial populations in the Czech Republic from 2009 to 2014

Frequency of powdery mildew resistances in spring barley cultivars in Czech variety trials

Postulation of resistance genes to barley diseases in heterogeneous varieties

Contact Info

Product

Resources

About