scholarly journals Identification of QTL conferring resistance to stripe rust (Puccinia striiformis f. sp. hordei) and leaf rust (Puccinia hordei) in barley using nested association mapping (NAM)

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0191666 ◽  
Author(s):  
Thomas Vatter ◽  
Andreas Maurer ◽  
Dragan Perovic ◽  
Doris Kopahnke ◽  
Klaus Pillen ◽  
...  
Keyword(s):  
Association Mapping ◽  
Leaf Rust ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Puccinia Hordei ◽  
Nested Association Mapping

Management of Leaf Rust and Stripe Rust in Hard Red Spring Wheat at Different Timings of Disease Onset

2020 ◽  
Vol 21 (4) ◽  
pp. 306-311
Author(s):  
Bryn Evin ◽  
Scott Meyer ◽  
Casey Schuh ◽  
Sam Haugen ◽  
Jessica Halvorson ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Spring Wheat ◽  
Host Resistance ◽  
Field Experiments ◽  
Puccinia Striiformis ◽  
Disease Onset ◽  
Puccinia Triticina ◽  
Hard Red Spring Wheat ◽  
Fungicide Application

Stripe rust (Puccinia striiformis f. sp. tritici) and leaf rust (Puccinia triticina) can cause significant yield reductions to hard red spring wheat (HRSW) in North Dakota (ND). The use of host resistance and fungicides can successfully manage this disease. However, the combination of them may not be appropriate every year. From 2016 to 2018, fungicide timing by cultivar experiments were conducted to update recommendations for rust management. Experiments were designed in a randomized complete block with a split-plot arrangement. Main plots included three HRSW cultivars that were moderately resistant, moderately susceptible, and susceptible. Subplots included the fungicide timings of Feekes 9, Feekes 10.5.1, a sequential application, and a nontreated control. Field experiments were categorized into three environments depending on rust onset and disease progress. When rust was detected at early heading, the susceptible cultivar benefited from all fungicide application timings. The detection of rust at tillering leaf stages suggested that fungicide treatments statistically lowered disease and in most cases had statistically higher yield, regardless of host resistance. These results suggest that the benefit from a fungicide application to manage leaf rust and stripe rust is highly influenced by the timing of disease onset and level of host resistance. Results will improve fungicide suggestions for HRSW producers in ND.

scholarly journals Genome-wide association mapping for resistance to leaf rust, stripe rust and tan spot in wheat reveals potential candidate genes

2018 ◽  
Vol 131 (7) ◽  
pp. 1405-1422 ◽  
Author(s):  
Philomin Juliana ◽  
Ravi P. Singh ◽  
Pawan K. Singh ◽  
Jesse A. Poland ◽  
Gary C. Bergstrom ◽  
...  
Keyword(s):  
Association Mapping ◽  
Leaf Rust ◽  
Candidate Genes ◽  
Stripe Rust ◽  
Tan Spot ◽  
Genome Wide Association ◽  
Potential Candidate ◽  
Genome Wide

Isometric virus-like particles encapsidate the double-stranded RNA found in Puccinia striiformis, Puccinia recondita, and Puccinia sorghi

1989 ◽  
Vol 67 (11) ◽  
pp. 3420-3425 ◽  
Author(s):  
Matthew J. Dickinson ◽  
A. Pryor
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Puccinia Recondita ◽  
Wheat Leaf Rust ◽  
Base Pairs ◽  
Double Stranded Rna ◽  
Virus Like Particles ◽  
Puccinia Sorghi ◽  
Wheat Leaf

Isolates of Puccinia striiformis (wheat stripe rust), Puccinia recondita (wheat leaf rust), and Puccinia sorghi (maize rust) contain complexes of double-stranded RNA. In each species, there are at least 12 double-stranded RNAs ranging in size from 150 to 5000 base pairs, and the number, size, and quantitative relationships between the double-stranded RNAs are distinctive for a given species. Most, if not all, of the double-stranded RNAs in each species can be extracted from isometric virus-like particles of 40 nm in diameter purified by sucrose and (or) Cs2SO4 gradients. The data indicate that in these three species of Puccinia the double-stranded RNAs are encapsidated in virus-like particles.

scholarly journals Development and molecular characterization of wheat-Aegilops peregrina Introgression Lines with resistance to leaf rust and stripe rust

2017 ◽  
Author(s):  
Deepika Narang ◽  
Satinder Kaur ◽  
Jyoti Saini ◽  
Parveen Chhuneja
Keyword(s):  
Leaf Rust ◽  
Molecular Characterization ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Puccinia Triticina ◽  
Introgression Lines ◽  
Stripe Rust Resistance ◽  
Adult Plant ◽  
Plant Stage

AbstractA wild non-progenitor species from wheat tertiary gene pool Aegilops peregrina accession pau3519 (UUSS) was used for introgression of leaf rust and stripe rust resistance in bread wheat. It was crossed and backcrossed with hexaploid wheat line Chinese Spring PhI to develop two homozygous BC2F6 wheat-Ae. peregrina introgression lines (ILs) viz. IL pau16058 and IL pau16061 through induced homoeologous recombination. Homozygous lines were screened against six Puccinia triticina and two Puccinia striiformis f. sp. tritici pathotypes at the seedling stage and a mixture of prevalent pathotypes of both rust pathogens at the adult plant stage. IL pau16061 showed resistance to leaf rust only while IL pau16058 was resistant to both leaf and stripe rust pathotypes throughout plant life. Molecular characterization of these ILs aided in defining the introgressed regions. Identification of linked markers with advance genomic technologies will aid in marker assisted pyramiding of alien genes in cultivated wheat background.

Characterization of genetic loci conferring adult plant resistance to leaf rust and stripe rust in spring wheat

Genome ◽  
2006 ◽  
Vol 49 (8) ◽  
pp. 977-990 ◽  
Author(s):  
H M William ◽  
R P Singh ◽  
J Huerta-Espino ◽  
G Palacios ◽  
K Suenaga
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Adult Plant Resistance ◽  
Puccinia Striiformis ◽  
Bulked Segregant Analysis ◽  
Puccinia Triticina ◽  
Adult Plant ◽  
Single Chromosome ◽  
Slow Rusting

Leaf (brown) and stripe (yellow) rusts, caused by Puccinia triticina and Puccinia striiformis, respectively, are fungal diseases of wheat (Triticum aestivum) that cause significant yield losses annually in many wheat-growing regions of the world. The objectives of our study were to characterize genetic loci associated with resistance to leaf and stripe rusts using molecular markers in a population derived from a cross between the rust-susceptible cultivar 'Avocet S' and the resistant cultivar 'Pavon76'. Using bulked segregant analysis and partial linkage mapping with AFLPs, SSRs and RFLPs, we identified 6 independent loci that contributed to slow rusting or adult plant resistance (APR) to the 2 rust diseases. Using marker information available from existing linkage maps, we have identified additional markers associated with resistance to these 2 diseases and established several linkage groups in the 'Avocet S' × 'Pavon76' population. The putative loci identified on chromosomes 1BL, 4BL, and 6AL influenced resistance to both stripe and leaf rust. The loci on chromosomes 3BS and 6BL had significant effects only on stripe rust, whereas another locus, characterized by AFLP markers, had minor effects on leaf rust only. Data derived from Interval mapping indicated that the loci identified explained 53% of the total phenotypic variation (R2) for stripe rust and 57% for leaf rust averaged across 3 sets of field data. A single chromosome recombinant line population segregating for chromosome 1B was used to map Lr46/Yr29 as a single Mendelian locus. Characterization of slow-rusting genes for leaf and stripe rust in improved wheat germplasm would enable wheat breeders to combine these additional loci with known slow-rusting loci to generate wheat cultivars with higher levels of slow-rusting resistance.Key words: Puccinia triticina, Puccinia striiformis, Triticum aestivum, bulked segregant analysis, single chromosome recombinant lines, linkage mapping, adult plant resistance.

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