Gametocidal effects and resistance to wheat leaf rust and stem rust in derivatives of a Triticum turgidum ssp. durum/Aegilops speltoides hybrid

Euphytica ◽  
1996 ◽  
Vol 88 (2) ◽  
pp. 117-124 ◽  
Author(s):  
G. F. Marais ◽  
Z. A. Pretorius
Keyword(s):  
Leaf Rust ◽  
Stem Rust ◽  
Triticum Turgidum ◽  
Aegilops Speltoides ◽  
Wheat Leaf Rust ◽  
Wheat Leaf ◽  
Derivatives Of

scholarly journals Leaf Rust on Aegilops speltoides Caused by a New Forma Specialis of Puccinia triticina

2004 ◽  
Vol 94 (1) ◽  
pp. 94-101 ◽  
Author(s):  
Pnina Ben Yehuda ◽  
Tamar Eilam ◽  
Jacob Manisterski ◽  
Ayelet Shimoni ◽  
Yehoshua Anikster
Keyword(s):  
Leaf Rust ◽  
Host Preference ◽  
Natural Habitat ◽  
Puccinia Triticina ◽  
Aegilops Speltoides ◽  
Wheat Cultivars ◽  
Wheat Leaf Rust ◽  
Forma Specialis ◽  
Wheat Leaf ◽  
First Time

A leaf rust attacking Aegilops speltoides in its natural habitat is reported for the first time. It was found in two locations in northern and central Israel. The two collections from A. speltoides resemble wheat leaf rust, Puccinia triticina, in most spore dimensions, in the morphology of the substomatal vesicle of the urediniospore, and in DNA content in pycniospore nuclei. Similarly to P. triticina isolates from wheat, isolates taken from A. speltoides are compatible with Thalictrum speciosissimum as an aecial host and they are crossed easily with wheat leaf rust isolates. However, isolates from A. speltoides differ from wheat leaf rust in their telial host range. They are avirulent to cultivated wheat cultivars, but attack hundreds of A. speltoides accessions that were immune to wheat leaf rust. This distinct host preference justifies delineation of the newly found leaf rust as a forma specialis (f. sp. speltoides) within P. triticina.

LOCATION AND LINKAGE OF GENES ON WHEAT CHROMOSOME 2D

1968 ◽  
Vol 10 (1) ◽  
pp. 99-105 ◽  
Author(s):  
N. H. Luig ◽  
R. A. McIntosh
Keyword(s):  
Leaf Rust ◽  
Stem Rust ◽  
Rust Resistance ◽  
Wheat Chromosome ◽  
Leaf Rust Resistance ◽  
Wheat Leaf Rust ◽  
Wheat Leaf ◽  
Linkage Of Genes ◽  
Compact Spike

Two distinct single dominant factors for resistance to wheat leaf rust were located on chromosome 2D. One of these factors, present in Kenya W 1483 and designated Lr15, is closely linked with the stem rust gene Sr6 and less closely with the gene C for compact spike. The second factor, present in Festiguay, is allelic with a factor for leaf rust resistance, in Webster. It is also linked to Sr6 and shows approximately 10 per cent recombination with C.

Metabolism of alicyclic acids and phenylpropanoids by uredospores of wheat stem rust and wheat leaf rust

1970 ◽  
Vol 48 (6) ◽  
pp. 1085-1091
Author(s):  
A. O. Jackson ◽  
D. J. Samborski ◽  
R. Rohringer
Keyword(s):  
Leaf Rust ◽  
Phenolic Acids ◽  
Stem Rust ◽  
Phenylalanine Ammonia Lyase ◽  
Wheat Leaf Rust ◽  
Shikimate Dehydrogenase ◽  
Wheat Stem Rust ◽  
Germination Medium ◽  
Tyrosine Ammonia Lyase ◽  
Wheat Leaf

Uredospores of wheat leaf rust did not take up or metabolize exogenous supplies of quinate-U-14C, shikimate-U-14C, p-coumarate-α-14C, or ferulate-α-14C. Caffeate-α-14C was converted to an unidentified ether-insoluble component which was recovered from the germination medium.Phenylalanine-U-14C and tyrosine-U-14C were readily taken up by uredospores of both rusts and were recovered from the solvent-soluble and insoluble fractions. No evidence for phenylalanine/tyrosine interconversion was obtained. Radioactivity was not incorporated into glycosides or free and bound esters of phenolic acids when phenylalanine-U-14C or tyrosine-U-14C were used as precursors. Radioactivity was not detected in free phenolic acids when uredospores were fed phenylalanine-U-14C. When tyrosine-U-14C was the precursor, radioactive p-coumarate was detected in the germination medium kept at 20 °C, and radioactive p-coumarate and caffeate were both recovered from the germination medium kept at 30 °C.Extracts of uredospores of wheat stem rust and wheat leaf rust contained shikimate dehydrogenase and tyrosine ammonia-lyase. Quinate dehydrogenase and phenylalanine ammonia-lyase were not detected.

scholarly journals Isozyme Uniformity and Virulence Variation in Puccinia graminis f. sp. tritici and P. recondita f. sp. tritici in Australia

1983 ◽  
Vol 36 (4) ◽  
pp. 403 ◽  
Author(s):  
JJ Burdon ◽  
NH Luig ◽  
DR Marshall
Keyword(s):  
Leaf Rust ◽  
Stem Rust ◽  
Growing Season ◽  
Puccinia Graminis ◽  
Wheat Leaf Rust ◽  
Wheat Stem Rust ◽  
Rust Pathogen ◽  
Wheat Leaf ◽  
Virulence Variation

During a routine survey of pathotypes of Puccinia graminis f. sp. tritici (the wheat stem rust pathogen) and P. recondita f. sp. tritici (the wheat leaf rust pathogen) present in Australia during the 1981-82 growing season, 16 pathotypes of P. graminis tritici and 12 pathotypes of P. recondita tritici were detected in total samples of 193 and 180 isolates of the two pathogens respectively. For both pathogens the distribution of isolates amongst the different pathotypes was highly uneven. The commonest pathotype of P. graminis tritici (pathotype 343-1,2,3,5,6) comprised 50% of isolates while the commonest pathotype of P. recondita tritici (pathotype 104-2,3,6) made up 69 % of isolates. Many pathotypes of both species were represented by single isolates only.

scholarly journals Resistance to Leaf Rust, Stripe Rust, and Stem Rust in Aegilops spp. in Israel

Plant Disease ◽  
2005 ◽  
Vol 89 (3) ◽  
pp. 303-308 ◽  
Author(s):  
Y. Anikster ◽  
J. Manisterski ◽  
D. L. Long ◽  
K. J. Leonard
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Stripe Rust ◽  
Stem Rust ◽  
Field Tests ◽  
Puccinia Triticina ◽  
Wheat Breeding ◽  
Wheat Leaf Rust ◽  
Seedling Resistance ◽  
Wheat Leaf

In all, 1,323 single plant accessions of Aegilops bicornis, A. kotschyi, A. longissima, A. ovata, A. searsii, A. sharonensis, A. speltoides, and A. variabilis collected from 18 regions in Israel and 2 adjacent regions in Lebanon and Egypt were evaluated for leaf rust (Puccinia triticina) and stripe rust (P. striiformis) resistance in field plots and for seedling resistance to leaf rust and stem rust (P. graminis f. sp. tritici) in greenhouse tests. Nearly all accessions of A. speltoides were highly resistant to leaf rust, stripe rust, and stem rust. A. longissima and A. ovata were highly resistant to stripe rust, whereas A. bicornis and A. kotschyi were highly susceptible. A. searsii was highly susceptible to stem rust, but 24 to 51% of accessions of A. bicornis, A. longissima, A. ovata, and A. variabilis were resistant to stem rust. Except for A. ovata and A. speltoides, more than 95% of the Aegilops accessions were susceptible to leaf rust caused by P. recondita alternating on Anchusa spp. Only Aegilops ovata was susceptible to P. recondita from Echium spp. A. bicornis, A. koschyi, and A. searsii were highly susceptible as seedlings to common wheat leaf rust caused by P. triticina. Most accessions of A. variabilis and about half of the accessions of A. longissima had good seedling resistance to P. triticina. Few accessions of A. ovata showed seedling resistance to the P. triticina population in Israel, but 30% were resistant to U.S. isolates. In field tests, A. bicornis showed high susceptibility to common wheat leaf rust, but more than 90% of the accessions of the other Aegilops spp. developed little or no leaf rust on adult plants. The Aegilops spp. in Israel and adjoining countries provide a rich and varied source of rust resistance for wheat breeding.

scholarly journals Autoinfection in wheat leaf rust epidemics

2008 ◽  
Vol 177 (4) ◽  
pp. 1001-1011 ◽  
Author(s):  
Christian Lannou ◽  
Samuel Soubeyrand ◽  
Lise Frezal ◽  
Joël Chadœuf
Keyword(s):  
Leaf Rust ◽  
Wheat Leaf Rust ◽  
Wheat Leaf

THE INHERITANCE OF RESISTANCE IN RYE TO Puccinia recondita f. sp. secalis and f. sp. tritici

1984 ◽  
Vol 64 (3) ◽  
pp. 511-519 ◽  
Author(s):  
G. L. C. MUSA ◽  
P. L. DYCK ◽  
D. J. SAMBORSKI
Keyword(s):  
Disease Resistance ◽  
Leaf Rust ◽  
Secale Cereale ◽  
Single Gene ◽  
Inbred Lines ◽  
Puccinia Recondita ◽  
Wheat Leaf Rust ◽  
Susceptible Parent ◽  
Seedling Resistance ◽  
Wheat Leaf

The inheritance of seedling resistance to isolate RLR 213/78 of rye leaf rust (Puccinia recondita f. sp. secalis) and race 30 of wheat leaf rust (P. recondita f. sp. tritici Rob.) was investigated in six inbred lines of rye (Secale cereale). Inbred line UM8116 was used as the susceptible parent in crosses. Inbred lines UM8003, UM8071 and UM8301 each have a single gene and UM8336 and UM8340 each have two genes for resistance to rye leaf rust. For resistance to wheat leaf rust UM8071 has a single gene, UM8003 and UM8340 each have two genes and UM8301 and UM8336 each have three genes. UM8295 is heterogeneous for reaction to both rusts. One of the genes in UM8340 may condition resistance to both rusts. The genes for resistance to RLR 213/78 appear to be independently inherited while some of the genes conferring resistance to race 30 may be identical or very closely linked. The potential of rye as a source of disease resistance for wheat and triticale improvement is discussed.Key words: Secale cereale, disease resistance, wheat leaf rust

Robust fitting of fluorescence spectra for pre-symptomatic wheat leaf rust detection with Support Vector Machines

2011 ◽  
Vol 79 (2) ◽  
pp. 180-188 ◽  
Author(s):  
Christoph Römer ◽  
Kathrin Bürling ◽  
Mauricio Hunsche ◽  
Till Rumpf ◽  
Georg Noga ◽  
...  
Keyword(s):  
Support Vector Machines ◽  
Leaf Rust ◽  
Fluorescence Spectra ◽  
Support Vector ◽  
Wheat Leaf Rust ◽  
Robust Fitting ◽  
Vector Machines ◽  
Wheat Leaf
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