Barley—<i>Pyrenophora graminea</i> interaction: QTL analysis and gene mapping

Pecchioni, Nicola; Valè, Giampiero; Toubia-Rahme, H.; Faccioli, Primetta; Terzi, Valeria; Delogu, Giovanni; Fischbeck, G.

doi:10.1046/j.1439-0523.1999.118001029.x

Cited by 25 publications

(19 citation statements)

References 31 publications

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“…For instance, bbr2H coincided with one of the three QTL against leaf rust, bbr4Ha coincided with one of the two QTL against powdery mildew, and bbr5Hb coincided with one of the three QTL against leaf rust and one of the five QTL against net blotch. In addition, one QTL, bbr7Hc, identified in this study also had corresponding chromosomal location with one of the QTL against leaf stripe detected in a different barley population (38). The location correspondence of QTL detected for resistance to various diseases suggest that some of the genes underlying QTL are commonly involved in the defense response again pathogens.…”

Section: Discussionsupporting

confidence: 58%

Comparative analyses of genomic locations and race specificities of loci for quantitative resistance to Pyricularia grisea in rice and barley

Chen

Wang

Xing

et al. 2003

Proc. Natl. Acad. Sci. U.S.A.

125

118

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Comparative genomic analyses have revealed extensive colinearity in gene orders in distantly related taxa in mammals and grasses, which opened new horizons for evolutionary study. The objective of our study was to assess syntenic relationships of quantitative trait loci (QTL) for disease resistance in cereals by using a model system in which rice and barley were used as the hosts and the blast fungus Pyricularia grisea Sacc. as the pathogen. In total, 12 QTL against three isolates were identified in rice; two had effects on all three isolates, and the other 10 had effects on only one or two of the three isolates. Twelve QTL for blast resistance were identified in barley; one had effect on all three isolates, and the other 11 had effects on only one or two of the three isolates. The observed isolate specificity led to a hypothesis about the durability of quantitative resistance commonly observed in many plant host-pathogen systems. Four pairs of the QTL showed corresponding map positions between rice and barley, two of the four QTL pairs had complete conserved isolate specificity, and another two QTL pairs had partial conserved isolate specificity. Such corresponding locations and conserved specificity suggested a common origin and conserved functionality of the genes underlying the QTL for quantitative resistance and may have utility in gene discovery, understanding the function of the genomes, and identifying the evolutionary forces that structured the organization of the grass genomes.

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Section: Discussionsupporting

confidence: 58%

Comparative analyses of genomic locations and race specificities of loci for quantitative resistance to Pyricularia grisea in rice and barley

Chen

Wang

Xing

et al. 2003

Proc. Natl. Acad. Sci. U.S.A.

125

118

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“…Thomsen et al (1997) mapped this qualitative resistance gene in cv 'Alf' on the long arm of chromosome 2 (2H) and proposed Rdg1 as its designation. However, Rdg1 is not the only resistance gene present in barley germplasm, and several new sources of complete resistance have been found in European and non-European germplasm (Skou et al 1994;Pecchioni et al 1999). Recently, a new qualitative resistance gene to P. graminea, named Rdg2 and carried by a highly resistant six-rowed winter barley variety, has been mapped on the short arm of chromosome 1 (7H) (Tacconi et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Isolate-specific QTLs of resistance to leaf stripe (Pyrenophora graminea) in the 'Steptoe' × 'Morex' spring barley cross

2003

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Leaf stripe caused by the fungus Pyrenophora graminea represents a serious threat to grain yield in organically grown barley and in conventional Nordic and Mediterranean districts, for which resistant cultivars are necessary. A medium-density, molecular marker map derived from a 'Steptoe' (partially resistant) x 'Morex' (susceptible) spring barley cross and its derived doubled-haploid mapping population inoculated with the fungus made it possible to identify QTLs of resistance to leaf stripe. In order to investigate isolate-specificity of partial resistance, the 'Steptoe' x 'Morex' segregating population was inoculated with two highly virulent P. graminea isolates, Dg2 and Dg5. The present study demonstrates that partial resistance to leaf stripe of cv 'Steptoe' is governed in part by shared loci and in part by isolate-specific ones. One QTL is common to the resistance for the two isolates, on the long arm of chromosome 2 (2H), two QTLs are linked on chromosome 3 (3H), and the remaining two are isolate-specific, respectively for isolate Dg2 on chromosome 2 (2H) and for isolate Dg5 on chromosome 7 (5H). The QTL in common is that with the major effect on the resistance for each isolate, explaining 18.3% and 30.9% R(2) respectively for Dg2 and Dg5. The isolate-specific QTLs mapped in the 'Steptoe' x 'Morex' barley reference map support the assumption of Parlevliet and Zadoks (1977) that partial resistance may be due to minor gene-for-minor-gene interactions. Map comparisons of the QTLs with the known qualitative resistance genes to leaf stripe, Rdg1 (2H) and Rdg2 (7H), as well as with other QTLs of partial resistance in barley, show that the QTL for resistance to both isolates mapped on the long arm of chromosome 2 (2H) does not coincide with the qualitative Rdg1 gene but is linked to it at about 30 cM. One isolate-specific QTL of resistance to P. graminea, mapped on the short arm of chromosome 2 (2H), is coincident with a QTL for resistance to Pyrenophora teres previously mapped in the 'Steptoe' x 'Morex' cross.

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“…Другая копия Chs выделена из кДНК библио теки, полученной из листьев ячменя после инокуляции пато-генным грибом Blumeria graminis (Christensen et al, 1998). Копии гена Chs были картированы на хромосомах 1HS, 1HL и 6HS (Pecchioni et al, 1999;Peukert et al, 2013); нук-леотидные последовательности, сходные с Chs, также были идентифицированы в собранных контигах хромосом 2HS, 2HL, 4HS и 6HL (Peukert et al, 2013). В геноме яч-меня присутствует одна копия гена Chi, локализованная на хромосоме 5HL (Druka et al, 2003).…”

Section: структурные гены биосинтеза флавоноидных соединений у ячменяunclassified

“…Было показано, что данный локус сцеплен с геном, определя-ющим формирование вместо остей трехлопастных при-датков (фурок) (Hoods vs. awns, K k), и находится в группе сцепления IV (хромосома 4H) (Buckley, 1930;Robertson, 1933;Myler, Stanford 1942;Immer, Henderson 1943). Было продемонстрировано сцепление Bl с GI (Normal vs. glossy seedlings, GI gl) (Immer, Henderson, 1943) и c геном, опре-деляющим устойчивость к мучнистой росе (Resistance vs. susceptibility to race of mildew, Mlg mlg) (Briggs, 1945 Y09233 (Christensen et al, 1998) 1HS (Pecchioni et al, 1999) 1HL, 1HS, 6HS, 2HS, 2HL, 4HS, 6HL (Peukert et al, 2013) Chi 1 (Druka et al, 2003) AF474923 (Druka et al, 2003) 5HL (Druka et al, 2003) F3h 1 (Meldgaard, 1992;Khlestkina et al, 2011) X58138 (Meldgaard, 1992) 2HL (Khlestkina et al, 2011;Peukert et al, 2013) Первыми установили, что существует более одного фак-тора, определяющего голубую окраску алейронового слоя, J.L. Myler и E.H. Stanford (1942).…”

Section: регуляция биосинтеза флавоноидных пигментовunclassified