The genetic characterisation of stripe rust resistance in the German wheat cultivar Alcedo

Jagger, L. J.; Newell, Claire L.; Berry, Simon; MacCormack, R.; Boyd, Lesley A.

doi:10.1007/s00122-010-1481-8

Cited by 44 publications

(33 citation statements)

References 35 publications

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“…Depending on environment and disease pressure, a low level of stripe rust resistance was observed for Palmiet, supporting the detection of this QTL. QTL for stripe rust APR have been reported on chromosome 4B in the cvs Alcedo (Jagger et al 2011), Oligoculm (Suenaga et al 2003), Avocet S (William et al 2006), Guardian (Melichar et al 2008) and cvs Libellula and Strampelli (Lu et al 2009). The stripe rust QTL from Avocet S was also reported to have an effect on leaf rust (William et al 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Predicted means for each RIL, for all LAI and RT data sets, were extracted and used in further analyses to minimise error variation in mean values. To identify significant effects between different QTL combinations, the GLR model compared RILs within QTL groups and between groups using t test comparisons, with all QTL groups being compared to all other groups (Jagger et al 2011).…”

Section: Statistical Analysesmentioning

confidence: 99%

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Identification of adult plant resistance to stripe rust in the wheat cultivar Cappelle-Desprez

et al. 2012

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Following the appearance of stripe rust in South Africa in 1996, efforts have been made to identify new sources of durable resistance. The French cultivar Cappelle-Desprez has long been considered a source of durable, adult plant resistance (APR) to stripe rust. As Cappelle-Desprez contains the seedling resistance genes Yr3a and Yr4a, wheat lines were developed from which Yr3a and Yr4a had been removed, while selecting for Cappelle-Desprez derived APR effective against South African pathotypes of the stripe rust fungus, Puccinia striiformis f. sp. tritici. Line Yr16DH70, adapted to South African wheat growing conditions, was selected and crossed to the stripe rust susceptible cultivar Palmiet to develop a segregating recombinant inbred line mapping population. A major effect QTL, QYr.ufs-2A was identified on the short arm of chromosome 2A derived from Cappelle-Desprez, along with three QTL of smaller effect, QYr.ufs-2D, QYr.ufs-5B and QYr.ufs-6D. QYr.ufs-2D was located within a region on the short arm of chromosome 2D believed to be the location of the stripe rust resistance gene Yr16. An additional minor effect QTL, QYr.ufs-4B, was identified in the cv. Palmiet. An examination of individual RILs carrying single or combinations of each QTL indicated significant resistance effects when QYr.ufs-2A was combined with the three minor QTL from Cappelle-Desprez, and between QYr.ufs-2D and QYr.ufs-5B.

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Section: Discussionmentioning

confidence: 99%

Section: Statistical Analysesmentioning

confidence: 99%

Identification of adult plant resistance to stripe rust in the wheat cultivar Cappelle-Desprez

et al. 2012

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“…This had been identified in numerous studies and is described as group 3 on 1BL (QRYr1B.3) in Table 1 (Bariana et al 2001, 2010; Jagger et al 2011; Lillemo et al 2008; Melichar et al 2008; Rosewarne et al 2008, 2012; William et al 2006; Zwart et al 2010). There is a wide range in the LOD (2.8–23) and PEV (4.5–65) scores indicating the variability that this locus can contribute.…”

Section: Groupmentioning

confidence: 96%

“…Six lines, Alcedo (Jagger et al 2011), Avocet (William et al 2006), Janz (Zwart et al 2010), Libellula, Strampelli (Lu et al 2009) and Palmiet (Agenbag et al 2012) were identified with QTLs on the long arm of chromosome 4B. Alcedo had relatively high LOD and PEV scores, whereas all the others had low to moderate scores.…”

Section: Groupmentioning

confidence: 99%

Quantitative trait loci of stripe rust resistance in wheat

et al. 2013

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Key messageOver 140 QTLs for resistance to stripe rust in wheat have been published and through mapping flanking markers on consensus maps, 49 chromosomal regions are identified.AbstractOver thirty publications during the last 10 years have identified more than 140 QTLs for stripe rust resistance in wheat. It is likely that many of these QTLs are identical genes that have been spread through plant breeding into diverse backgrounds through phenotypic selection under stripe rust epidemics. Allelism testing can be used to differentiate genes in similar locations but in different genetic backgrounds; however, this is problematic for QTL studies where multiple loci segregate from any one parent. This review utilizes consensus maps to illustrate important genomic regions that have had effects against stripe rust in wheat, and although this methodology cannot distinguish alleles from closely linked genes, it does highlight the extent of genetic diversity for this trait and identifies the most valuable loci and the parents possessing them for utilization in breeding programs. With the advent of cheaper, high throughput genotyping technologies, it is envisioned that there will be many more publications in the near future describing ever more QTLs. This review sets the scene for the coming influx of data and will quickly enable researchers to identify new loci in their given populations.

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“…This was attributed to the pyramiding of several resistance genes in these cultivars. Subsequent genetic analysis of these cultivars revealed that they indeed contained combinations of resistance genes/QTL expressed in both seedlings and adult plants (de Vallavieille-Pope et al, 1990; Chen and Wang, 1996; Mallard et al, 2005; Jagger et al, 2011; Agenbag et al, 2012; Powell et al, 2013; Basnet et al, 2014). Similarly, in winter wheat it is believed that the durable resistance to stem rust and powdery mildew have been achieved by the combination of multiple minor resistance genes (Singh et al, 2011; Ellis et al, 2014; Brown, 2015).…”

Section: Comparison Of Strategies For Combining Disease Resistance Genesmentioning

confidence: 99%

Combining Selective Pressures to Enhance the Durability of Disease Resistance Genes

Delmotte¹,

Bourguet²,

Franck

et al. 2016

Front. Plant Sci.

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The efficacy of disease resistance genes in plants decreases over time because of the selection of virulent pathogen genotypes. A key goal of crop protection programs is to increase the durability of the resistance conferred by these genes. The spatial and temporal deployment of plant disease resistance genes is considered to be a major factor determining their durability. In the literature, four principal strategies combining resistance genes over time and space have been considered to delay the evolution of virulent pathogen genotypes. We reviewed this literature with the aim of determining which deployment strategy results in the greatest durability of resistance genes. Although theoretical and empirical studies comparing deployment strategies of more than one resistance gene are very scarce, they suggest that the overall durability of disease resistance genes can be increased by combining their presence in the same plant (pyramiding). Retrospective analyses of field monitoring data also suggest that the pyramiding of disease resistance genes within a plant is the most durable strategy. By extension, we suggest that the combination of disease resistance genes with other practices for pathogen control (pesticides, farming practices) may be a relevant management strategy to slow down the evolution of virulent pathogen genotypes.

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The genetic characterisation of stripe rust resistance in the German wheat cultivar Alcedo

Cited by 44 publications

References 35 publications

Identification of adult plant resistance to stripe rust in the wheat cultivar Cappelle-Desprez

Identification of adult plant resistance to stripe rust in the wheat cultivar Cappelle-Desprez

Quantitative trait loci of stripe rust resistance in wheat

Combining Selective Pressures to Enhance the Durability of Disease Resistance Genes

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