Effectiveness of Adult-Plant Resistance in Reducing Grain Yield Loss to Powdery Mildew in Winter Wheat

Plant Disease ◽  
1993 ◽  
Vol 77 (6) ◽  
pp. 618 ◽  
Author(s):  
C. A. Griffey
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Grain Yield ◽  
Plant Resistance ◽  
Yield Loss ◽  
Adult Plant Resistance ◽  
Adult Plant

Mapping QTL involved in adult plant resistance to powdery mildew in the winter wheat line RE714 in two susceptible genetic backgrounds

2002 ◽  
Vol 121 (2) ◽  
pp. 133-140 ◽  
Author(s):  
D. MINGEOT ◽  
N. CHANTRET ◽  
P. V. BARET ◽  
A. DEKEYSER ◽  
N. BOUKHATEM ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Adult Plant ◽  
Wheat Line ◽  
Mapping Qtl

scholarly journals Genome-Wide Association Analysis and Genomic Prediction for Adult-Plant Resistance to Septoria Tritici Blotch and Powdery Mildew in Winter Wheat

2021 ◽  
Vol 12 ◽  
Author(s):  
Admas Alemu ◽  
Gintaras Brazauskas ◽  
David S. Gaikpa ◽  
Tina Henriksson ◽  
Bulat Islamov ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Plant Resistance ◽  
Genomic Prediction ◽  
Adult Plant Resistance ◽  
Genome Wide Association ◽  
Septoria Tritici Blotch ◽  
Septoria Tritici ◽  
Adult Plant ◽  
Genome Wide

Septoria tritici blotch (STB) caused by the fungal pathogen Zymoseptoria tritici and powdery mildew (PM) caused by Blumeria graminis f.sp tritici (Bgt) are among the forefront foliar diseases of wheat that lead to a significant loss of grain yield and quality. Resistance breeding aimed at developing varieties with inherent resistance to STB and PM diseases has been the most sustainable and environment-friendly approach. In this study, 175 winter wheat landraces and historical cultivars originated from the Nordic region were evaluated for adult-plant resistance (APR) to STB and PM in Denmark, Estonia, Lithuania, and Sweden. Genome-wide association study (GWAS) and genomic prediction (GP) were performed based on the adult-plant response to STB and PM in field conditions using 7,401 single-nucleotide polymorphism (SNP) markers generated by 20K SNP chip. Genotype-by-environment interaction was significant for both disease scores. GWAS detected stable and environment-specific quantitative trait locis (QTLs) on chromosomes 1A, 1B, 1D, 2B, 3B, 4A, 5A, 6A, and 6B for STB and 2A, 2D, 3A, 4B, 5A, 6B, 7A, and 7B for PM adult-plant disease resistance. GP accuracy was improved when assisted with QTL from GWAS as a fixed effect. The GWAS-assisted GP accuracy ranged within 0.53–0.75 and 0.36–0.83 for STB and PM, respectively, across the tested environments. This study highlights that landraces and historical cultivars are a valuable source of APR to STB and PM. Such germplasm could be used to identify and introgress novel resistance genes to modern breeding lines.

Confirmation of Three Quantitative Trait Loci Conferring Adult Plant Resistance to Powdery Mildew in Two Winter Wheat Populations

Euphytica ◽  
2006 ◽  
Vol 155 (1-2) ◽  
pp. 1-13 ◽  
Author(s):  
D. M. Tucker ◽  
C. A. Griffey ◽  
S. Liu ◽  
G. Brown-Guedira ◽  
D. S. Marshall ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Winter Wheat ◽  
Plant Resistance ◽  
Quantitative Trait ◽  
Adult Plant Resistance ◽  
Adult Plant ◽  
Trait Loci

Molecular characterization of adult plant resistance loci against powdery mildew in winter wheat cultivar Liangxing 99 using BSR-Seq technology

Plant Disease ◽  
2021 ◽  
Author(s):  
Xiaohan Shi ◽  
Peipei Wu ◽  
Jinghuang Hu ◽  
Dan Qiu ◽  
Yunfeng Qu ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Wheat Cultivar ◽  
Field Tests ◽  
Blumeria Graminis ◽  
Adult Plant ◽  
Winter Wheat Cultivar ◽  
Plant Stage

Winter wheat cultivar Liangxing 99, which carries gene Pm52, is resistant to powdery mildew at both seedling and adult plant stages. An F2:6 recombinant inbred line (RIL) population from cross Liangxing 99 × Zhongzuo 9504 was phenotyped with Blumeria graminis f. sp. tritici isolate Bgt27 at the adult plant stage in four field tests and the seedling stage in a greenhouse test. The analysis of bulk segregant RNA sequences identified an SNP-enriched locus, Qaprpm.caas.2B, on chromosome 2BL in the same genomic interval of Pm52 associated with the all-stage resistance (ASR) and Qaprpm.caas.7A on chromosome 7AL associated with the adult-plant resistance (APR) against the disease. Qaprpm.caas.2B was detected in a 1.3 cM genetic interval between markers Xicscl726 and XicsK128 in which Pm52 was placed with a range of LOD values from 28.1 to 34.6, and the phenotype variations explained in terms of maximum disease severity (MDS) ranged from 45% to 52%. The LOD peak of Qaprpm.caas.7A was localized in a 4.6 cM interval between markers XicsK7A8 and XicsK7A26 and explained the phenotypic variation of MDS ranging from 13% to 16%. The results of this study confirmed Pm52 for ASR and identified Qaprpm.caas.7A for APR to powdery mildew in Liangxing 99. Keywords: Triticum aestivum; Blumeria graminis f. sp. tritici; Pm52; QTL; BSR-Seq

scholarly journals Quantitative Trait Loci Mapping for Adult-Plant Resistance to Powdery Mildew in Bread Wheat

2006 ◽  
Vol 96 (7) ◽  
pp. 784-789 ◽  
Author(s):  
S. S. Liang ◽  
K. Suenaga ◽  
Z. H. He ◽  
Z. L. Wang ◽  
H. Y. Liu ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Plant Resistance ◽  
Quantitative Trait ◽  
Powdery Mildew Resistance ◽  
Adult Plant Resistance ◽  
Adult Plant ◽  
Phenotypic Variance ◽  
Mildew Resistance ◽  
Trait Loci

Powdery mildew, caused by Blumeria graminis f. sp. tritici, is a major disease to wheat (Triticum aestivum) worldwide. Use of adult-plant resistance (APR) is an effective method to develop wheat cultivars with durable resistance to powdery mildew. In the present study, 432 molecular markers were used to map quantitative trait loci (QTL) for APR to powdery mildew in a doubled haploid (DH) population with 107 lines derived from the cross Fukuho-komugi × Oligoculm. Field trials were conducted in Beijing and Anyang, China during 2003-2004 and 2004-2005 cropping seasons, respectively. The DH lines were planted in a randomized complete block design with three replicates. Artificial inoculation was carried out in Beijing with highly virulent isolate E20 of B. graminis f. sp. tritici and the powdery mildew severity on penultimate leaf was evaluated four times, and the maximum disease severity (MDS) on penultimate leaf was investigated in Anyang under natural inoculation in May 2004 and 2005. The heritability of resistance to powdery mildew for MDS in 2 years and two locations ranged from 0.82 to 0.93, while the heritability for area under the disease progress curve was between 0.84 and 0.91. With the method of composite interval mapping, four QTL for APR to powdery mildew were detected on chromosomes 1AS, 2BL, 4BL, and 7DS, explaining 5.7 to 26.6% of the phenotypic variance. Three QTL on chromosomes 1AS, 2BL, and 7DS were derived from the female, Fukuho-komugi, while the one on chromosome 4BL was from the male, Oligoculm. The QTL on chromosome 1AS showed high genetic effect on powdery mildew resistance, accounting for 19.5 to 26.6% of phenotypic variance across two environments. The QTL on 7DS associated with the locus Lr34/Yr18, flanked by microsatellite Xgwm295.1 and Ltn (leaf tip necrosis). These results will benefit for improving powdery mildew resistance in wheat breeding programs.

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