Development of wheat genotypes possessing a combination of leaf rust resistance genes Lr19 and Lr24

Šliková, Svetlana; Gregová, E.; Bartoš, Pavel; Hanzalová, A.; Hudcovicová, Martina; Kraic, Ján

doi:10.17221/4055-pse

Cited by 7 publications

(4 citation statements)

References 24 publications

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“…Overall, the rust severity decreased as the number of seedling resistance genes increased, indicating the importance of gene pyramiding in reducing the damage caused by leaf rust including yield loss (Šliková et al 2004). Gene pyramiding, a process of combining more than one resistance gene in a single genotype, has been a proven strategy for developing long-lasting resistance to plant disease (Singh et al 2000).…”

Section: Discussionmentioning

confidence: 99%

“…Gene pyramiding, a process of combining more than one resistance gene in a single genotype, has been a proven strategy for developing long-lasting resistance to plant disease (Singh et al 2000). This strategy has been exploited for resistance to bacterial blast and bacterial blight in rice (Hittalmani et al 2000; Huang et al 1997), powdery mildew and leaf rust in wheat (Liu et al 2000; Šliková et al 2004) and stripe rust in barley (Castro et al 2003). In our study, accessions of the WC contained one to five genes and, in total, 43 gene combinations were observed including 19 two-gene, 19 three-gene, 6 four-gene and 2 five-gene combinations.…”

Section: Discussionmentioning

confidence: 99%

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Molecular and phenotypic characterization of seedling and adult plant leaf rust resistance in a world wheat collection

et al. 2013

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Genetic resistance is the most effective approach to managing wheat leaf rust. The aim of this study was to characterize seedling and adult plant leaf rust resistance of a world wheat collection. Using controlled inoculation with ten races of Puccinia triticina, 14 seedling resistance genes were determined or postulated to be present in the collection. Lr1, Lr3, Lr10 and Lr20 were the most prevalent genes around the world while Lr9, Lr14b, Lr3ka and/or Lr30 and Lr26 were rare. To confirm some gene postulations, the collection was screened with gene-specific molecular markers for Lr1, Lr10, Lr21 and Lr34. Although possessing the Lr1 and/or Lr10 gene-specific marker, 51 accessions showed unexpected high infection types to P. triticina race BBBD. The collection was tested in the field, where rust resistance ranged from nearly immune or highly resistant with severity of 1 % and resistant host response to highly susceptible with severity of 84 % and susceptible host response. The majority of the accessions possessing the adult plant resistance (APR) gene Lr34 had a maximum rust severity of 0–35 %, similar to or better than accession RL6058, a Thatcher-Lr34 near-isogenic line. Many accessions displayed an immune response or a high level of resistance under field conditions, likely as a result of synergy between APR genes or between APR and seedling resistance genes. However, accessions with three or more seedling resistance genes had an overall lower field severity than those with two or fewer. Immune or highly resistant accessions are potential sources for improvement of leaf rust resistance. In addition, some lines were postulated to have known but unidentified genes/alleles or novel genes, also constituting potentially important sources of novel resistance.Electronic supplementary materialThe online version of this article (doi:10.1007/s11032-013-9899-8) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Molecular and phenotypic characterization of seedling and adult plant leaf rust resistance in a world wheat collection

et al. 2013

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“…Gene Lr24 is derived from rye. It was used in Slovakia for a combination with Lr19 to assure more durable resistance in the lines developed as sources of leaf rust resistance (ŠLIKOVÁ et al 2004). Gene Lr28 was derived from Triticum speltoides.…”

Section: Discussionmentioning

confidence: 99%

Physiologic Specialization of Wheat Leaf Rust (Puccinia triticina Eriks.) in theCzech Republic in 2001-2004

Hanzalová¹,

Bartoš²

2006

CZECH J GENET PLANT

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Abstract:In 2001-2004 virulence of the wheat leaf rust population in the Czech Republic was studied on Thatcher near-isogenic lines with Lr1, Lr2a, Lr2b, Lr2c, Lr3a, Lr9, Lr10, Lr11, Lr15, Lr17, Lr19, Lr21, Lr23, Lr24, Lr26 and Lr28. Samples of leaf rust (180 in total) were obtained from different parts of the Czech Republic.Resistance genes Lr9 and Lr19 were effective to all tested isolates like in the previous years. Unlike the previous years virulence on Lr24 and Lr28 was observed. Relatively effective were also Lr1, Lr2a, Lr24, Lr28 and Lr2b. Other Lr genes were defeated by the majority of the tested samples. Our results transformed to the numbers of physiologic races indicate that race 61SaBa prevailed like in the previous years, followed by races 61, 2, 12Sa-Ba, 2SaBa, 14, 77SaBa, 12, 57, 6, 53, 53SaBa, 77, and 14SaBa. Twenty-one winter wheat cultivars registered in 2001-2004 were tested with 8 leaf rust isolates. Out of them 15 showed resistance at least to one rust isolate. High resistance recorded in field trials for cvs Batis and Ilias, which were susceptible to all tested rust isolates at the seedling stage, demonstrates the importance of field (partial) resistance.

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“…A RAPD marker, OPJ-09 also was shown to be in complete linkage to the Lr24 resistance gene [23]. The markers have been used in wheat breeding experiments employing MAS [24]. There are other reports of plymorphic RAPD and SCAR markers for Lr24 by Dedryver et al, [25].…”

Section: Discussionmentioning

confidence: 99%

Identification and Validation of a Microsatellite Marker for the Seedling Resistance Gene Lr24 in Bread Wheat

Jk¹,

Singh²,

Rao³

et al. 2015

J Plant Pathol Microbiol

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The background of PBW343, the high yielding and widely cultivated bread wheat cultivar of the Indian subcontinent was utilized. We were able to identify specific microsatellite markers for Agropyron elongatum derived seedling resistance gene Lr24. The two markers, Xgwm114 and Xbarc71 were mapped at a distance of 2.4 cM from Lr24 locus. They can be unquestionably utilized as landmarks for identification of these genes. An F 2 population segregating for Lr24 and Lr48 in the background of PBW343 was utilized for this study. Though phenotypic reaction of the plants of the progeny populations to leaf rust infection was recorded in the seedling stage, it was difficult to perform the same in the adult plant stage as more than one gene effective against the same pathogen act mutually thus making it difficult to interpret and differentiate the resistance reaction of each of the two different genes. This is a major aspect of concern for many plant breeders in various gene pyramiding experiments since differentiating virulences of pathogens for each and every gene utilized cannot be available within all geographic locations. Molecular markers play a significant role in all such cases.

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Development of wheat genotypes possessing a combination of leaf rust resistance genes Lr19 and Lr24

Cited by 7 publications

References 24 publications

Molecular and phenotypic characterization of seedling and adult plant leaf rust resistance in a world wheat collection

Molecular and phenotypic characterization of seedling and adult plant leaf rust resistance in a world wheat collection

Physiologic Specialization of Wheat Leaf Rust (Puccinia triticina Eriks.) in theCzech Republic in 2001-2004

Identification and Validation of a Microsatellite Marker for the Seedling Resistance Gene Lr24 in Bread Wheat

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