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

Godoy, Jayfred; Rynearson, Sheri; Chen, Xianming; Pumphrey, Michael O.

doi:10.1094/phyto-06-17-0195-r

Cited by 31 publications

(27 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On chromosome 1B we also found a significant MTA for yellow rust, in agreement with previous studies in durum and bread wheat, which placed different markers significantly associated with this trait, but in differing genetic positions [101][102][103][104]. The candidate gene analysis revealed the proximity of this marker (SNP809) to sugar transporter protein genes.…”

Section: Discussionsupporting

confidence: 91%

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

et al. 2020

View full text Add to dashboard Cite

Final grain production and quality in durum wheat are affected by biotic and abiotic stresses. The association mapping (AM) approach is useful for dissecting the genetic control of quantitative traits, with the aim of increasing final wheat production under stress conditions. In this study, we used AM analyses to detect quantitative trait loci (QTL) underlying agronomic and quality traits in a collection of 294 elite durum wheat lines from CIMMYT (International Maize and Wheat Improvement Center), grown under different water regimes over four growing seasons. Thirty-seven significant marker-trait associations (MTAs) were detected for sedimentation volume (SV) and thousand kernel weight (TKW), located on chromosomes 1B and 2A, respectively. The QTL loci found were then confirmed with several AM analyses, which revealed 12 sedimentation index (SDS) MTAs and two additional loci for SV (4A) and yellow rust (1B). A candidate gene analysis of the identified genomic regions detected a cluster of 25 genes encoding blue copper proteins in chromosome 1B, with homoeologs in the two durum wheat subgenomes, and an ubiquinone biosynthesis O-methyltransferase gene. On chromosome 2A, several genes related to photosynthetic processes and metabolic pathways were found in proximity to the markers associated with TKW. These results are of potential use for subsequent application in marker-assisted durum wheat-breeding programs.

show abstract

Section: Discussionsupporting

confidence: 91%

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Moreover, a high level of resistance (IT score = 0–3) response appeared at the adult plant stage and a low level of resistance phenotype appeared at the seedling stage. Similarly, a more susceptible response appeared at the seedling stage than at the adult plant stage [ 16 , 27 , 28 , 29 ]. Wheat genotypes were more susceptible to USA stripe rust races compared to Pakistani stripe rust races, where the resistant phenotype response was dominant.…”

Section: Discussionmentioning

confidence: 99%

“…Fungicidal spray at the appropriate time can reduce the risk of loss caused by pathogens but it requires a healthy finance. Despite fungicidal spray, the areas with a high disease pressure are prevalent to substantial loss if susceptible cultivars are present [ 16 ]. In Pakistan, fungicidal control is also not a sensible choice for >8 MH area due to its high cost, spray machinery requirement, the alarming conditions of water resources, as well as air and soil pollution.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Association Mapping for Stripe Rust Resistance in Pakistani Spring Wheat Genotypes

Habib

Awan

Sadia

et al. 2020

Plants

View full text Add to dashboard Cite

Stripe rust caused by the pathogen Puccinia striiformis f. sp. tritici (Pst) is a major threat for wheat, resulting in low yield and grain quality loss in many countries. Genetic resistance is a prevalent method to combat the disease. Mapping the resistant loci and their association with traits is highly exploited in this era. A panel of 465 Pakistani spring wheat genotypes were evaluated for their phenotypic response to stripe rust at the seedling and adult plant stages. A total of 765 single nucleotide polymorphism (SNP) markers were applied on 465 wheat genotypes to evaluate their stripe rust response against nine races during the seedling test and in three locations for the field test. Currently, twenty SNPs dispersed on twelve chromosomal regions (1A, 1B, 1D, 2A, 2B, 4A, 4B, 5B, 6A, 6B, 6D and 7B) have been identified that were associated with rust race-specific resistance at the seedling stage. Thirty SNPs dispersed on eighteen chromosomal regions (1A, 1B, 1D, 2A, 2B, 2D, 3A, 3B, 3D, 4B, 5A, 5B, 6A, 6B, 6D, 7A, 7B and 7D) are associated with adult plant resistance. SNP loci IWB3662 was linked with all three Pakistani races, and likewise IWA2344 and IWA4096 were found to be linked with three different USA races. The present research findings can be applied by wheat breeders to increase their resistant capability and yield potential of their cultivars, through marker-assisted selection.

show abstract

“…GWAS has been widely used to study agronomically important traits of a variety of crops, including maize, soybean, rice, cotton and wheat [33][34][35][36][37]. In addition, GWAS has been used to identify the genes underlying resistance to stripe rust in wheat [20,[38][39][40]. In this study, 143 common wheat landrace accessions from the southern autumnsown spring wheat zone of China were evaluated for resistance against Pst at the seedling and adultplant stages in multiple years and eld locations.…”

Section: Introductionmentioning

confidence: 99%

Genome-wide Association Mapping Reveals Potential Novel Loci Controlling Stripe-rust Resistance in a Chinese Wheat Landrace Diversity Panel From the Southern Autumn-sown Spring Wheat Zone

Wang

Cheng

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Background:Stripe rust, caused by the fungal pathogen Puccinia striiformis f. sp. tritici (Pst), is a serious foliar disease of wheat. Identification of novel stripe-rust resistance genes and cultivation of resistant varieties are considered to be the most effective approaches to control this disease. In this study, we evaluated the infection type (IT), disease severity (DS) and area under the disease progress curve (AUDPC) of 143 Chinese wheat landrace accessions for stripe-rust resistance. Assessments were undertaken in five environments at the adult-plant stage with Pst mixture races under field conditions, in addition, IT was assessed at the seedling stage with two prevalent Pst races (CYR32 and CYR34) under controlled greenhouse conditions. Results:Seventeen accessions showed stable high-level resistance to stripe rust across all environments under field tests,while four accessions showed resistance to the Pst races CYR32 and CYR34 at the all-stage.Combining phenotypic data from the field and greenhouse trials with 6404 markers covering the whole genome, we detected 17quantitative trait locus(QTLs) on 11 chromosomes for IT associated with seedling resistance and 15 QTLs on seven chromosomes for IT, final disease severityor AUDPC associated with adult-plant resistance. Four stable QTLs detected on four chromosomes, which explained 9.99%–23.30% of the phenotypic variation, were simultaneously associated with seedling and adult-plant resistance. Integrating a linkage map of stripe-rust resistance in wheat, 29 QTLs overlapped with previously reported genes or QTLs, while two and oneQTLs conferring seedling and adult-plant resistancerespectively were mapped distantly from previously reported stripe rust resistance genes or QTLs and may be novel resistantloci. Conclusions:Our results provided an integrated view of stripe rust resistance resources in a Chinese wheat landrace diversity panel from the southern autumn-sown spring wheat zone.The identified resistant accessions and resistance loci will be useful in the ongoing effort to develop new wheat cultivars with strong resistance to stripe rust.

show abstract

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

Cited by 31 publications

References 65 publications

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

Mapping Agronomic and Quality Traits in Elite Durum Wheat Lines under Differing Water Regimes

Genome-Wide Association Mapping for Stripe Rust Resistance in Pakistani Spring Wheat Genotypes

Genome-wide Association Mapping Reveals Potential Novel Loci Controlling Stripe-rust Resistance in a Chinese Wheat Landrace Diversity Panel From the Southern Autumn-sown Spring Wheat Zone

Contact Info

Product

Resources

About