Resistance of Tangmai 4 wheat to powdery mildew, stem rust, leaf rust, and stripe rust and its chromosome composition

2004 ◽  
Vol 84 (4) ◽  
pp. 1015-1023 ◽  
Author(s):  
H. J. Li ◽  
R. L. Conner ◽  
B. D. McCallum ◽  
X. M. Chen ◽  
H. Su ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Leaf Rust ◽  
Stripe Rust ◽  
Stem Rust ◽  
Northern China ◽  
Western Canada ◽  
C Banding ◽  
Rust Diseases ◽  
Hard Red Winter Wheat ◽  
Secale Cereale L

The hard red winter wheat Tangmai 4 did not develop symptoms of infection following inoculation with powdery mildew (Erysiphe graminis DC. f. sp. tritici E. Marchal) isolates from regions of western Canada and northern China. Tangmai 4 exhibited resistance to stem rust (Puccinia graminis Pers. f. sp. tritici Eriks. & Henn.) and leaf rust (P. triticina Eriks.) races from western Canada. This wheat line was resistant to individual stripe rust (P. striiformis Westend. f. sp. tritici Eriks.) races from the U.S. and Canada. Sequential C-banding and genomic in situ hybridization (GISH), and electrophoretic analyses of high molecular weight glutenins and gliadins demonstrated that Tangmai 4 carried a pair of T1BL·1RS wheat-rye (Secale cereale L.) translocated chromosomes. Since the genes located on T1BL·1RS are no longer effective in controlling powdery mildew and the rust diseases, Tangmai 4 must carry additional genes for resistance to these diseases, which makes it a valuable resource for the improvement of resistance in wheat against these diseases. Key words: T1BL·1RS translocation, disease resistance, sequential C-banding and GISH, glutenin, gliadin

Seedling resistances to rust diseases in international triticale germplasm

2010 ◽  
Vol 61 (12) ◽  
pp. 1036 ◽  
Author(s):  
J. Zhang ◽  
C. R. Wellings ◽  
R. A. McIntosh ◽  
R. F. Park
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Plant Resistance ◽  
Stem Rust ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Stem Rust Resistance ◽  
Adult Plant ◽  
Seedling Resistance ◽  
Rust Diseases

Seedling resistances to stem rust, leaf rust and stripe rust were evaluated in the 37th International Triticale Screening Nursery, distributed by the International Wheat and Maize Improvement Centre (CIMMYT) in 2005. In stem rust tests, 12 and 69 of a total of 81 entries were postulated to carry Sr27 and SrSatu, respectively. When compared with previous studies of CIMMYT triticale nurseries distributed from 1980 to 1986 and 1991 to 1993, the results suggest a lack of expansion in the diversity of stem rust resistance. A total of 62 of 64 entries were resistant to five leaf rust pathotypes. In stripe rust tests, ~93% of the lines were postulated to carry Yr9 alone or in combination with other genes. The absence of Lr26 in these entries indicated that Yr9 and Lr26 are not genetically associated in triticale. A high proportion of nursery entries (63%) were postulated to carry an uncharacterised gene, YrJackie. The 13 lines resistant to stripe rust and the 62 entries resistant to leaf rust represent potentially useful sources of seedling resistance in developing new triticale cultivars. Field rust tests are needed to verify if seedling susceptible entries also carry adult plant resistance.

Disease resistance in the genusAegilops L. — stem rust, leaf rust, stripe rust, and powdery mildew

1985 ◽  
Vol 33 (2) ◽  
pp. 133-153 ◽  
Author(s):  
Jan Valkoun ◽  
Karl Hammer ◽  
Dagmar Kučerová ◽  
Pavel Bartoš
Keyword(s):  
Disease Resistance ◽  
Powdery Mildew ◽  
Leaf Rust ◽  
Stripe Rust ◽  
Stem Rust

Cytogenetic studies in wheat. XV. Location of rust resistance genes in VPM1 and their genetic linkage with other disease resistance genes in chromosome 2A

Genome ◽  
1993 ◽  
Vol 36 (3) ◽  
pp. 476-482 ◽  
Author(s):  
H. S. Bariana ◽  
R. A. McIntosh
Keyword(s):  
Powdery Mildew ◽  
Leaf Rust ◽  
Stripe Rust ◽  
Resistance Genes ◽  
Stem Rust ◽  
Genetic Linkage ◽  
Rust Resistance ◽  
Monosomic Analysis ◽  
Telocentric Mapping ◽  
Repulsion Linkage

Inheritance studies showed that the VPM1-derived seedling resistances to stem rust, stripe rust, leaf rust, and powdery mildew were controlled by single genes; the genes for rust resistance were designated Sr38, Yr17, and Lr37, respectively, whereas the gene for resistance to powdery mildew was postulated to be Pm4b. Sr38, Yr17, and Lr37 were shown to be closely linked and distally located in the short arm of chromosome 2A. They showed very close repulsion linkage with Lr17 and were genetically independent of other genes known to be located in chromosome 2A. Previously unmapped, Yr1 appeared to be distally located in the long arm of chromosome 2A.Key words: stem rust, stripe rust, leaf rust, powdery mildew, monosomic analysis, telocentric mapping, genetic linkage.

scholarly journals Virulence surveillance of wheat black stem rust fungus

2014 ◽  
Vol 11 (2) ◽  
pp. 803-812
Author(s):  
Baghdad Science Journal
Keyword(s):  
Leaf Rust ◽  
Disease Severity ◽  
Stem Rust ◽  
Yellow Rust ◽  
Rust Fungus ◽  
The North ◽  
Rust Diseases ◽  
Northern Regions ◽  
Infection Disease ◽  
Wheat Rust

General survey for wheat rust diseases in Iraqi fields was done during the seasons of 2010, 2011 and 2012. The survey covered different fields in southern, middle and northern regions. Results of the first season indicated that most of Iraqi cultivars such as Tmmoze2, IPA 99 and Mexipak showed different types of susceptibility to both yellow and leaf rust infection. Disease severity increased when the conditions were favorable for infections with using susceptible cultivars. The severity of leaf rust was less in the north region comparing with the middle and south regions. Most of the introduced cultivars such as Sham6 and Cimmyto showed susceptible reaction to yellow and leaf rust. Yellow rust was in epiphytotic form at the Iraqi-Syrian-Turkish triangle where the disease severity was 100%. Low disease severity of stem rust was observed on some cultivars (1-5%), except for the cultivar Mexipak which showed 40%S in Najaf. Rusts at season of 2011 were restricted mostly in Baghdad and the yellow rust was dominant. The AUDPC of 15 wheat cultivars showed that Sawa and Sali were highly susceptible to the three types of rusts while Babil113 and Tamoze2 were resistant. No rusts were detected at season 2012.

L’ORGE DE PRINTEMPS SOPHIE

1981 ◽  
Vol 61 (1) ◽  
pp. 153-156
Author(s):  
C. A. ST-PIERRE ◽  
G. J. PELLETIER ◽  
J. P. DUBUC ◽  
H. R. KLINCK
Keyword(s):  
Powdery Mildew ◽  
Leaf Rust ◽  
Research Station ◽  
Western Canada ◽  
Barley Cultivar ◽  
Net Blotch ◽  
Average Yield ◽  
Eastern Canada ◽  
Breeder Seed ◽  
Late Maturity

In the Eastern Canada Co-op Barley test, Sophie has given an average yield of grain 1% higher than Mingo and Laurier, 3% higher than Bruce and 13% higher than Conquest. In the 1979 regional trials, it has given yields comparable to those of Loyola, the most widely grown cultivar in Quebec. From 295 comparisons with check cultivars, its yield was superior (P = 95%) in 23% of the comparisons, equal in 69% and inferior in 8% of the cases. This cultivar has also given higher yields than the checks in Western Canada. It is different mainly because of its late maturity. It is, on the average, 4 days later than the checks. It is also more resistant to lodging than Loyola and Laurier. Its straw strength is inferior to that of Bruce but almost equal to that of Conquest. Its weight per 1000 grains is higher than that of Conquest or Bruce, similar to that of Loyola or Mingo, and smaller than that of Laurier. It is moderately susceptible to powdery mildew. Bruce is, however, more resistant to this disease. Sophie had shown more resistance to leaf rust than the checks. It is also moderately susceptible to net blotch. This feed grain barley cultivar is a joint release between Laval University and the Agriculture Canada Research Station of Ste-Foy, Quebec. Breeder seed will be maintained by Université Laval at Ste-Foy.

A multiple resistance locus on chromosome arm 3BS in wheat confers resistance to stem rust (Sr2), leaf rust (Lr27) and powdery mildew

2011 ◽  
Vol 123 (4) ◽  
pp. 615-623 ◽  
Author(s):  
R. Mago ◽  
L. Tabe ◽  
R. A. McIntosh ◽  
Z. Pretorius ◽  
R. Kota ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Leaf Rust ◽  
Stem Rust ◽  
Multiple Resistance ◽  
Resistance Locus ◽  
Chromosome Arm

scholarly journals Screening of Wheat Genotypes Against Leaf Rust Under Artificial and Natural Environmental Condition

2021 ◽  
pp. 117-122
Author(s):  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Natural Conditions ◽  
Wheat Genotypes ◽  
Rust Diseases ◽  
Resistant Varieties ◽  
Resistant Lines ◽  
Wheat Lines ◽  
Moderately Resistant ◽  
Type Response

Rust diseases are considered to be responsible for significant qualitative and quantitative damages on wheat. However, the severity of rust diseases can be managed through development of resistant lines. The present study was aimed to scrutinize existing wheat germplasm against leaf rust and stripe rust of wheat. For this purpose 30 wheat genotypes were assessed for disease resistance under artificial inoculation conditions and 16 genotypes were evaluated under natural conditions at Nuclear Institute for Agriculture (NIA), Tandojam, Pakistan. The disease severity ratings were taken according to Cobs’scale. The studies revealed that wheat genotypes were markedly differed in their resistance to leaf and stripe rust. Among the tested wheat lines / varieties, 6 were rated as resistant, 6 moderately resistant, 13 showed MRMS type response, 2 showed moderately susceptible reaction, 3 lines/varieties displayed susceptible response against leaf rust under artificial conditions. Moreover, under natural conditions 1 was rated as resistant, 2 showed MRMS type response against leaf rust and all were found resistant or immune against stripe rusts under both the conditions. Hence, it was suggested that resistant genotypes evaluated from these studies can be deployed in the future breeding strategies to evolve the resistant varieties against leaf & stripe rusts of wheat

scholarly journals Prevalence and Intensity of Barley Diseases in South Tigray, Ethiopia

2017 ◽  
Vol 6 (3) ◽  
pp. 41-45
Author(s):  
Teklay A. Teferi ◽  
Muruts L. Wubshet
Keyword(s):  
Powdery Mildew ◽  
Leaf Rust ◽  
Stem Rust ◽  
Integrated Management ◽  
Management Options ◽  
Leaf Scald ◽  
The Mean ◽  
All Diseases

Barley is attacked by many diseases and hence, the study was conducted to quantify and profile barley affecting diseases for management options. The survey was based on the assessment of barley fields at 5 km interval. Results indicated that powdery mildew, leaf rust, stem rust, leaf scald, and smuts were among the important diseases in south Tigray. The prevalence of the former diseases was 60, 60, 40, 47.8, and 40%, respectively. The incidence of powdery mildew, scaled, leaf rust and stem rust was 100% in considerable fields and cultivars. The incidence of smuts was ranged from 5% to 30%. Similarly, the mean severities of powdery mildew, leaf rust, stem rust and leaf scald were 43.4, 54.5, 45 and 20%, respectively, while, smuts caused complete spike losses.  Therefore, investigating of the pathogens variability especially for rusts, powdery mildew and scald as well as developing integrated management options for all diseases is of concern.

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