scholarly journals Theoretical Bases and Sources for Breeding Wheat for Combined Disease Resistance

2011 ◽  
Vol 41 (No. 4) ◽  
pp. 127-143 ◽  
Author(s):  
V. Šíp ◽  
P. Bartoš ◽  
J. Chrpová ◽  
A. Hanzalová ◽  
L. Širlová ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Barley Yellow Dwarf Virus ◽  
Wheat Breeding ◽  
Tan Spot ◽  
Common Bunt ◽  
Head Blight ◽  
Sources Of Resistance ◽  
Barley Yellow Dwarf ◽  
Glume Blotch ◽  
Yellow Dwarf Virus

Achievements and prospects of wheat breeding for disease resistance in the world and in theCzech Republic are discussed. Attention was paid to possibilities of increasing resistance to rusts, powdery mildew, Fusarium head blight, leaf blotch, glume blotch, tan spot, common bunt and barley yellow dwarf virus on wheat. Methodical approaches adopted in national ring infection tests were outlined. New sources of resistance to the above-mentioned diseases were detected and described on the basis of three-year results of field infection tests.  

scholarly journals Results of the Czech National Ring Tests of disease resistance in wheat

2012 ◽  
Vol 48 (No. 4) ◽  
pp. 189-199 ◽  
Author(s):  
J. Chrpová ◽  
V. Šíp ◽  
P. Bartoš ◽  
A. Hanzalová ◽  
J. Palicová ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Barley Yellow Dwarf Virus ◽  
Wheat Breeding ◽  
Head Blight ◽  
Sources Of Resistance ◽  
Barley Yellow Dwarf ◽  
Brown Leaf Spot ◽  
Brown Leaf ◽  
Yellow Dwarf Virus ◽  
Dwarf Bunt

In this contribution actual results of the Czech national ring tests of disease resistance in wheat are presented that are performed at 3–5 locations each year. Special attention was paid to possibilities of increasing resistance to rusts, powdery mildew, Fusarium head blight and brown leaf spot diseases. New sources of resistance to the above-mentioned diseases were detected and described. Achievements and prospects of wheat breeding for resistance to these diseases, as well as to other important diseases and pests (common and dwarf bunt, eyespot and stem base diseases, barley yellow dwarf virus, orange wheat blossom midge) are discussed.

scholarly journals Achievements and prospects of wheat breeding for disease resistance

2012 ◽  
Vol 38 (No. 1) ◽  
pp. 16-28 ◽  
Author(s):  
P. Bartoš ◽  
V. Šíp ◽  
J. Chrpová ◽  
J. Vacke ◽  
E. Stuchlíková ◽  
...  
Keyword(s):  
Czech Republic ◽  
Disease Resistance ◽  
Powdery Mildew ◽  
Barley Yellow Dwarf Virus ◽  
Wheat Breeding ◽  
Tan Spot ◽  
Dwarf Virus ◽  
Head Blight ◽  
Sources Of Resistance ◽  
The Czech Republic

Achievements and prospects of wheat breeding for disease resistance in the world and in the Czech Republic are reviewed. Attention is paid to rusts, powdery mildew, leaf blotch, glume blotch, tan spot, fusarium head blight, common and dwarf bunt, eyespot, barley yellow dwarf virus on wheat and wheat dwarf virus. Genes for resistance to rusts and powdery mildew in the cultivars registered in the Czech Republic are listed. Promising resistance genes and sources of resistance to the above mentioned diseases are reviewed. Prospects of resistance breeding including application of methods of molecular genetics and development of synthetic hexaploids are outlined.

Survey of Barley yellow dwarf virus incidence in winter cereal crops, and assessment of wheat and barley resistance to the virus

2016 ◽  
Vol 67 (10) ◽  
pp. 1054 ◽  
Author(s):  
Eva Beoni ◽  
Jana Chrpová ◽  
Jana Jarošová ◽  
Jiban Kumar Kundu
Keyword(s):  
Barley Yellow Dwarf Virus ◽  
Rhopalosiphum Padi ◽  
Wheat Breeding ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Cereal Crops ◽  
Winter Cereal ◽  
Barley Yellow Dwarf ◽  
Significant Difference ◽  
Yellow Dwarf Virus

A survey of Barley yellow dwarf virus (BYDV) incidence in cereal crops in the Czech Republic over 4 years showed, on average, 13.3% BYDV-positive, randomly tested wheat and barley samples. The cultivated wheat and barley cultivars had different levels of susceptibility to BYDV infection. Field trials were performed with different barley and wheat breeding lines and cultivars, and resistance traits were evaluated after artificial inculcation by the viruliferous aphid vector Rhopalosiphum padi L. with BYDV-PAV. Our results showed high variability of visual symptom score (VSS) and reduction in grain weight per spike (GWS-R) in trials within the tested lines and cultivars. The barley line (WBON 96-123) and cultivars (Wysor, Travira) that contained RYd2 differed significantly from other cultivars in VSS. Line WBON 96-123 and cvv. Wysor and Yatzi showed the lowest GWS-R. Wheat line PSR 3628 and cvv. Altigo, Elan, Sparta, Aladin and Hewit showed significant difference from other cultivars in VSS. PSR 3628, Sparta, and Elan showed the lowest GWS-R. Similar results were obtained from BYDV titre analysis by RT-qPCR corresponding to the VSS and GWS-R traits. A low virus titre corresponded to low VSS and GWS-R. Hence, our results suggest that laborious and time-consuming GWS-R analysis could be replaced in some cases by qPCR-based BYDV titre analysis and, together with VSS evaluation, could enhance the efficiency of resistance assessment.

Stride oat

2013 ◽  
Vol 93 (4) ◽  
pp. 749-753 ◽  
Author(s):  
J. W. Mitchell Fetch ◽  
A. Tekauz ◽  
P. D. Brown ◽  
N. Ames ◽  
J. Chong ◽  
...  
Keyword(s):  
Barley Yellow Dwarf Virus ◽  
Kernel Weight ◽  
Crown Rust ◽  
Western Canada ◽  
Head Blight ◽  
Good Resistance ◽  
Canadian Prairies ◽  
Barley Yellow Dwarf ◽  
Yellow Dwarf Virus ◽  
Moderate Resistance

Mitchell Fetch, J. W., Tekauz, A., Brown, P. D., Ames, N., Chong, J., Fetch, Jr., T. G., Haber, S. M., Menzies, J. G.,, T. F. Townley-Smith, Stadnyk, K. D. and Green, D. A. 2013. Stride oat. Can. J. Plant Sci. 93: 749–753. Stride is a white-hulled spring oat (Avena sativa L.) cultivar with moderate resistance to fusarium head blight. It is postulated to carry the crown rust resistance combination Pc39, Pc68 and Pc94, which was effective against the prevalent crown rust races on the Canadian prairies at the time of its release. It has very good resistance to loose and covered smut, moderately good resistance to most of the prairie stem rust races (likely due to the presence of Pg2 and Pg13), and intermediate reaction to barley yellow dwarf virus (BYDV). Stride has high test weight, but low kernel weight. Stride exhibits high yielding capacity in the oat growing areas of western Canada. Stride was registered (Reg. No. 7180) in Canada 2012 Apr. 23.

Implementation of probes for tracing chromosome segments conferring barley yellow dwarf virus resistance

2001 ◽  
Vol 52 (12) ◽  
pp. 1389 ◽  
Author(s):  
W. Zhang ◽  
M. Carter ◽  
S. Matsay ◽  
P. Stoutjesdijk ◽  
R. Potter ◽  
...  
Keyword(s):  
Gel Electrophoresis ◽  
Barley Yellow Dwarf Virus ◽  
Solid Phase ◽  
Wheat Breeding ◽  
Yellow Dwarf ◽  
Chromosome Segment ◽  
Dwarf Virus ◽  
Barley Yellow Dwarf ◽  
Wheat Group ◽  
Yellow Dwarf Virus

Two PCR-based assays were examined for tracing the presence of a Thinopyrum chromosome segment (Tc6 or Tc14) conferring barley yellow dwarf virus (BYDV) resistance in wheat breeding lines. The microsatellite gwm37 was used to assay the Thinopyrum chromosome segment or its wheat, Group 7, homoeologous segment, and was effective in characterising breeders material since heterozygous lines could be identified. A new set of primers derived from a Thinopyrum-specific DNA segment (csTiB1) provided a dominant marker that was readily scored by agarose gel electrophoresis. It was also demonstrated that the csTiB1 primers could be used to establish a solid phase PCR assay that avoided the requirement for gel electrophoresis and was amenable to use in a high-throughput, microtitre plate format. Depending on the number of DNA samples to be assayed, both primer pairs appear to have a place in breeding programs.

scholarly journals Mining and genomic characterization of resistance to tan spot, Stagonospora nodorum blotch (SNB), and Fusarium head blight in Watkins core collection of wheat landraces

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Jyotirmoy Halder ◽  
Jinfeng Zhang ◽  
Shaukat Ali ◽  
Jagdeep S. Sidhu ◽  
Harsimardeep S. Gill ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Fusarium Head Blight ◽  
Tan Spot ◽  
Stagonospora Nodorum ◽  
Head Blight ◽  
Sources Of Resistance ◽  
Stagonospora Nodorum Blotch ◽  
Valuable Source ◽  
Race 1 ◽  
Genomic Regions

Abstract Background In the late 1920s, A. E. Watkins collected about 7000 landrace cultivars (LCs) of bread wheat (Triticum aestivum L.) from 32 different countries around the world. Among which 826 LCs remain viable and could be a valuable source of superior/favorable alleles to enhance disease resistance in wheat. In the present study, a core set of 121 LCs, which captures the majority of the genetic diversity of Watkins collection, was evaluated for identifying novel sources of resistance against tan spot, Stagonospora nodorum blotch (SNB), and Fusarium Head Blight (FHB). Results A diverse response was observed in 121 LCs for all three diseases. The majority of LCs were moderately susceptible to susceptible to tan spot Ptr race 1 (84%) and FHB (96%) whereas a large number of LCs were resistant or moderately resistant against tan spot Ptr race 5 (95%) and SNB (54%). Thirteen LCs were identified in this study could be a valuable source for multiple resistance to tan spot Ptr races 1 and 5, and SNB, and another five LCs could be a potential source for FHB resistance. GWAS analysis was carried out using disease phenotyping score and 8807 SNPs data of 118 LCs, which identified 30 significant marker-trait associations (MTAs) with -log10 (p-value) > 3.0. Ten, five, and five genomic regions were found to be associated with resistance to tan spot Ptr race 1, race 5, and SNB, respectively in this study. In addition to Tsn1, several novel genomic regions Q.Ts1.sdsu-4BS and Q.Ts1.sdsu-5BS (tan spot Ptr race 1) and Q.Ts5.sdsu-1BL, Q.Ts5.sdsu-2DL, Q.Ts5.sdsu-3AL, and Q.Ts5.sdsu-6BL (tan spot Ptr race 5) were also identified. Our results indicate that these putative genomic regions contain several genes that play an important role in plant defense mechanisms. Conclusion Our results suggest the existence of valuable resistant alleles against leaf spot diseases in Watkins LCs. The single-nucleotide polymorphism (SNP) markers linked to the quantitative trait loci (QTLs) for tan spot and SNB resistance along with LCs harboring multiple disease resistance could be useful for future wheat breeding.

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