scholarly journals Genome‐wide mapping of resistance to stripe rust caused by Puccinia striiformis f. sp. tritici in hexaploid winter wheat

Crop Science ◽  
2020 ◽  
Vol 60 (1) ◽  
pp. 115-131
Author(s):  
Kebede T. Muleta ◽  
Xianming Chen ◽  
Michael Pumphrey
Keyword(s):  
Winter Wheat ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Genome Wide

scholarly journals Genome-wide association analysis of stripe rust resistance loci in wheat accessions from southwestern China

2020 ◽  
Vol 61 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Bin Cheng ◽  
Xu Gao ◽  
Ning Cao ◽  
Yanqing Ding ◽  
Yu Gao ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Puccinia Striiformis ◽  
Genome Wide Association ◽  
Southwestern China ◽  
Stripe Rust Resistance ◽  
Wheat Stripe Rust ◽  
Genome Wide ◽  
A Genome

AbstractWheat stripe rust can cause considerable yield losses, and genetic resistance is the most effective approach for controlling the disease. To identify the genomic regions responsible for Puccinia striiformis f. sp. tritici (Pst) resistance in a set of winter wheat strains mainly from southwestern China, and to identify DNA markers in these regions, we carried out a genome-wide association study (GWAS) of 120 China winter wheat accessions using single nucleotide polymorphism (SNP) markers from 90K wheat SNP arrays. In total, 16 SNP loci were significantly associated with wheat stripe rust in field and greenhouse trials. Of these, three distinctive SNPs on chromosomes 1B, 4A, and 6A were identified at a site in Mianyang in 2014, where the most prevalent wheat stripe rust races since 2009 have been V26 (G22-9, G22-14). This suggests that the three SNP loci were linked to the new quantitative trait loci (QTL)/genes resistant to the V26 races. Germplasm with immunity to Pst is a good source of stripe rust resistance for breeding, and after further validation, SNPs closely linked to resistance QTLs/genes could be converted into user-friendly markers and facilitate marker-assisted selection to improve wheat stripe rust resistance.

scholarly journals Genome-Wide Association Mapping of Loci for Resistance to Stripe Rust in North American Elite Spring Wheat Germplasm

2018 ◽  
Vol 108 (2) ◽  
pp. 234-245 ◽  
Author(s):  
Jayfred Gaham Godoy ◽  
Sheri Rynearson ◽  
Xianming Chen ◽  
Michael Pumphrey
Keyword(s):  
Stripe Rust ◽  
Spring Wheat ◽  
Puccinia Striiformis ◽  
Single Nucleotide Polymorphism Array ◽  
Infection Type ◽  
Genome Wide Association ◽  
Adult Plant ◽  
Wheat Germplasm ◽  
Genome Wide ◽  
A Genome

Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a major yield-limiting foliar disease of wheat (Triticum aestivum) worldwide. In this study, the genetic variability of elite spring wheat germplasm from North America was investigated to characterize the genetic basis of effective all-stage and adult plant resistance (APR) to stripe rust. A genome-wide association study was conducted using 237 elite spring wheat lines genotyped with an Illumina Infinium 90K single-nucleotide polymorphism array. All-stage resistance was evaluated at seedling stage in controlled conditions and field evaluations were conducted under natural disease pressure in eight environments across Washington State. High heritability estimates and correlations between infection type and severity were observed. Ten loci for race-specific all-stage resistance were confirmed from previous mapping studies. Three potentially new loci associated with race-specific all-stage resistance were identified on chromosomes 1D, 2A, and 5A. For APR, 11 highly significant quantitative trait loci (QTL) (false discovery rate < 0.01) were identified, of which 3 QTL on chromosomes 3A, 5D, and 7A are reported for the first time. The QTL identified in this study can be used to enrich the current gene pool and improve the diversity of resistance to stripe rust disease.

High-temperature adult-plant resistance to stripe rust in facultative winter wheat

2016 ◽  
Vol 67 (10) ◽  
pp. 1064 ◽  
Author(s):  
Beyhan Akin ◽  
Xian Ming Chen ◽  
Alex Morgunov ◽  
Nusret Zencirci ◽  
Anmin Wan ◽  
...  
Keyword(s):  
Molecular Markers ◽  
High Temperature ◽  
Winter Wheat ◽  
Stripe Rust ◽  
Field Experiments ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Stripe Rust Resistance ◽  
Adult Plant ◽  
Improvement Program

Stripe (yellow) rust, caused by Puccinia striiformis Westend. f. sp. tritici Erikss., is one of the most damaging diseases in wheat and is especially damaging for winter and facultative wheat. The objective of this study was to understand stripe rust resistance in 100 wheat and facultative wheat entries from the International Winter Wheat Improvement Program by conducting experiments in a greenhouse and in four field environments in Washington State, USA, and by genotyping molecular markers linked to Yr genes. Percentages of entries resistant to the rust races at the seedling stage were: PST-17, 44%; PST-37, 32%; PST-43, 45%; PST-45, 49%; PST-116, 18%; PST-100, 17%; and PST-127, 8%. Molecular markers were positive for genes Yr9, Yr17, and Yr18 and negative for Yr5, Yr10, and Yr15. Yr18 was present in 44 entries (44%). By using the highly virulent races PST-127 and PST-100 under controlled conditions, 16 entries were shown to have high-temperature adult-plant (HTAP) resistance and resistant–moderately resistant field reactions at all four field sites. Resistant entries, especially those with HTAP resistance, were also identified in the field experiments.

scholarly journals Genome-wide association study reveals new loci for yield-related traits in Sichuan wheat germplasm under stripe rust stress

2019 ◽  
Author(s):  
Xueling Ye ◽  
Jian Li ◽  
Yukun Cheng ◽  
Fangjie Yao ◽  
Li Long ◽  
...  
Keyword(s):  
Association Study ◽  
Candidate Genes ◽  
Stripe Rust ◽  
Genome Wide Association Study ◽  
Puccinia Striiformis ◽  
Kernel Weight ◽  
Genome Wide Association ◽  
Genome Wide ◽  
Meristem Development ◽  
The World

Abstract Background As one of the most important food crops in the world, increasing wheat (Triticum aestivum L.) yield is an urgent task for global food security under the continuous threat of stripe rust (caused by Puccinia striiformis f. sp. tritici) in many regions of the world. Molecular marker-assisted breeding is one of the most efficient ways to increase yield. Here, we identified loci associated to multi-environmental yield-related traits under stripe rust stress in 244 wheat accessions from Sichuan Province through genome-wide association study (GWAS) using 44059 polymorphic markers from the 55K single nucleotide polymorphism (SNP) chip. Results A total of 13 stable quantitative trait loci (QTLs) were found to be highly associating to yield-related traits, including 6 for spike length (SL), 3 for thousand-kernel weight (TKW), 2 for kernel weight per spike (KWPS), and 2 for both TKW and KWPS, in at least two test environments under stripe rust stress conditions. Of them, ten QTLs were overlapped or very close to the reported QTLs, three QTLs, QSL.sicau-1AL, QTKW.sicau-4AL, and QKWPS.sicau-4AL.1, were potentially novel through the physical location comparison with previous QTLs. Further, twenty-one candidate genes within three potentially novel QTLs were identified, they were mainly involved in the regulation of phytohormone, cell division and proliferation, meristem development, plant or organ development, and carbohydrate transport. Conclusions QTLs and candidate genes detected in our study for yield-related traits under stripe rust stress will facilitate elucidating genetic basis of yield-related trait and could be used in marker-assisted selection in wheat yield breeding.

scholarly journals Genome-wide association study reveals new loci for yield-related traits in Sichuan wheat germplasm under stripe rust stress

2019 ◽  
Author(s):  
Xueling Ye ◽  
Jian Li ◽  
Yukun Cheng ◽  
Fangjie Yao ◽  
Li Long ◽  
...  
Keyword(s):  
Association Study ◽  
Candidate Genes ◽  
Stripe Rust ◽  
Genome Wide Association Study ◽  
Puccinia Striiformis ◽  
Kernel Weight ◽  
Genome Wide Association ◽  
Genome Wide ◽  
Meristem Development ◽  
The World

Abstract Background As one of the most important food crops in the world, increasing wheat (Triticum aestivum L.) yield is an urgent task for global food security under the continuous threat of stripe rust (caused by Puccinia striiformis f. sp. tritici) in many regions of the world. Molecular marker-assisted breeding is one of the most efficient ways to increase yield. Here, we identified loci associated to multi-environmental yield-related traits under stripe rust stress in 244 wheat accessions from Sichuan Province through genome-wide association study (GWAS) using 44059 polymorphic markers from the 55K single nucleotide polymorphism (SNP) chip. Results A total of 13 stable quantitative trait loci (QTLs) were found to be highly associating to yield-related traits, including 6 for spike length (SL), 3 for thousand-kernel weight (TKW), 2 for kernel weight per spike (KWPS), and 2 for both TKW and KWPS, in at least two test environments under stripe rust stress conditions. Of them, ten QTLs were overlapped or very close to the reported QTLs, three QTLs, QSL.sicau-1AL, QTKW.sicau-4AL, and QKWPS.sicau-4AL.1, were potentially novel through the physical location comparison with previous QTLs. Further, twenty-one candidate genes within three potentially novel QTLs were identified, they were mainly involved in the regulation of phytohormone, cell division and proliferation, meristem development, plant or organ development, and carbohydrate transport. Conclusions QTLs and candidate genes detected in our study for yield-related traits under stripe rust stress will facilitate elucidating genetic basis of yield-related trait and could be used in marker-assisted selection in wheat yield breeding.

scholarly journals REACTION OF WINTER WHEAT GENOTYPES ON THE YELLOW (STRIPE) RUST PUCCINIA STRIIFORMIS, WES

2018 ◽  
Author(s):  
Vija STRAZDINA ◽  
Valentina FETERE ◽  
Liga FEODOROVA-FEDOTOVA ◽  
Janis JASKO ◽  
Olga TREIKALE
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Wheat Variety ◽  
Research Centre ◽  
Yield Losses ◽  
The Difference ◽  
Yellow Stripe

Yellow rust, caused by Puccinia striiformis Wes. is one of the most significant diseases constraint to winter wheat production in the world. Since 2011 in Europe have appeared distinct new races – Warrior, Kranich, Warrior (-) that have caused wide epidemics on different cultivars of wheat. Grain yield losses can be prevented by using a combination of varietal resistance and fungicides. Information on wheat variety susceptibility to local yellow (stripe) rust Puccinia striiformis Wes. races can help to reduce the risk of yield losses in high disease pressure situations. Field trials with eight most popular and perspective winter wheat varieties in Latvia were established in the North-Western part of Latvia (Stende Research Centre) in autumn of 2016. The trial was designed as two randomized complete blocks (treated and untreated) and data were statistically interpreted. Two applications of fungicides at BBCH 29-32 by T1 (prothioconazol 53 g L-1, spiroxamin 224 g L-1, tebucanazole 148 g L-1) and at BBCH 37-39 - T2 (bixafen 65 g L-1, prothioconazol 130 g L-1, fluopyram 65 g L-1- 1.5 L ha-1) were used to control the YR. Yield and 1000 kernel weight (TKW) were determined. Preliminary results indicated the difference between genotypes resistance/susceptibility to YR. The severity of infection level was 1- 80% depending on genotype resistance. Application of fungicides increased grain yield by 2.9 % to 33.0% and TKW by 3.4% - 33.2 % depending on variety. Observations showed the difference in the occurrence of symptoms on YR in different varieties of winter wheat under conditions of 2017 in Stende.

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