GENETIC INHIBITION OF EXPRESSION OF RESISTANCE GENE Lr23 IN WHEAT TO Puccinia recondita

1982 ◽  
Vol 62 (1) ◽  
pp. 219-220 ◽  
Author(s):  
P. L. DYCK
Keyword(s):  
Triticum Aestivum ◽  
Leaf Rust ◽  
Resistance Gene ◽  
Common Wheat ◽  
Triticum Aestivum L ◽  
Puccinia Recondita ◽  
Seedling Resistance ◽  
Experimental Line ◽  
The Common

The common wheat (Triticum aestivum L.) experimental line Prelude/8* Marquis was determined to have a gene that inhibits the expression of gene Lr23 for seedling resistance to leaf rust (Puccinia recondita Rob. ex. Desm.) whereas the cultivar Prelude does not. This inhibitor had previously been reported in the cultivar Thatcher.

GENETICS OF LEAF RUST REACTION IN THREE INTRODUCTIONS OF COMMON WHEAT

1977 ◽  
Vol 19 (4) ◽  
pp. 711-716 ◽  
Author(s):  
P. L. Dyck
Keyword(s):  
Triticum Aestivum ◽  
Disease Resistance ◽  
Leaf Rust ◽  
Resistance Gene ◽  
Common Wheat ◽  
Infection Type ◽  
Triticum Aestivum L ◽  
Puccinia Recondita ◽  
Seedling Resistance

The genetics of seedling resistance to leaf rust (Puccinia recondita Rob. ex. Desm.) was investigated in what (Triticum aestivum L.) introductions PI 268454, PI 58548 and PI 268316, originally collected in Afghanistan, China and Iran, respectively. PI 268454 was heterogeneous for resistance. A selection (PI 268454a) has a gene that confers a 1+ reaction while a second selection (PI 268454b) probably has resistance gene Lr2b. PI 58548 has two genes for resistance, one giving a 1+ reaction and the second a 2+. These two genes interact to produce a; 1 reaction. PI 268316 has three interacting genes, one giving a 1+ reaction, the second a 2+ and a third resistance gene similar to LrB. The gene giving the 1+ reaction was common to all three introductions. PI 58548 and PI 268316 carry different genes for infection type 2+. Backcross lines of the single genes were produced. Implications to breeding for disease resistance of genes interacting to produce different phenotype are discussed.

INHERITANCE OF LEAF RUST RESISTANCE IN WHEAT CULTIVARS RAFAELA AND EAP 26127 AND CHROMOSOME LOCATION.OF GENE Lr17

1977 ◽  
Vol 19 (2) ◽  
pp. 355-358 ◽  
Author(s):  
P. L. Dyck ◽  
E. R. Kerber
Keyword(s):  
Triticum Aestivum ◽  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Puccinia Recondita ◽  
Wheat Cultivars ◽  
Seedling Resistance

The inheritance of seedling resistance to leaf rust (Puccinia recondita) was studied in wheat (Triticum aestivum L.) cultivars Rafaela and EAP 26127. Rafaela has genes Lr14b and Lr17 while EAP 26127 has Lr17. Lr17 was located on chromosome 2A, possibly the short arm, and was independent of Lr11.

THE INHERITANCE OF RESISTANCE TO PUCCINIA RECONDITA IN A GROUP OF COMMON WHEAT CULTIVARS

1982 ◽  
Vol 24 (3) ◽  
pp. 273-283 ◽  
Author(s):  
P. L. Dyck ◽  
D. J. Samborski
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Infection Type ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Puccinia Recondita ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Seedling Resistance ◽  
Plant Stage

The inheritance of seedling resistance to leaf rust (Puccinia recondita Rob. ex Desm.) was studied in common wheat (Triticum aestivum L.) cultivars: Terenzio, Lageadinho, PI 321999, PI 197249, CRIC 26809-68, CIRC 32125-70, 72 Hills 175 and Frontana. They have in common two complementary genes (LrT2 and LrT3) that give a variable type of leaf rust resistance. Gene LrT2 is the most effective gene. In the Thatcher background, resistance to stem rust in the adult plant stage appears to be associated with this gene. The previously reported gene from PI 58548 that gives a 2+ infection type appears to be the same as LrT2. Terenzio also carries Lr3 and Lr30 while PI 197249 has Lr3.

ANEUPLOID ANALYSIS OF A GENE FOR LEAF RUST RESISTANCE DERIVED FROM THE COMMON WHEAT CULTIVAR TERENZIO

1981 ◽  
Vol 23 (3) ◽  
pp. 405-409 ◽  
Author(s):  
P. L. Dyck ◽  
E. R. Kerber
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Rust Resistance ◽  
Wheat Cultivar ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Backcross Line ◽  
The Common ◽  
Aneuploid Analysis ◽  
Leaf Rust Resistance Genes

The LrT gene for resistance to leaf rust present in the common wheat (Triticum aestivum L.) backcross line RL 6049, and originally derived from the cultivar Terenzio, was shown to be on chromosome 4B. Farther analysis indicated that it is on the long arm of this chromosome, 2.9 ± 1.3 crossover units from the centromere. It is independent of or loosely linked with Sr7a, a gene for stem rust resistance known to be on the long arm of chromosome 4B. It is inherited independently of leaf rust resistance genes Lr1, Lr2a, Lr3, Lr10, Lr14b, Lr16, Lr17 and Lr18. LrT has been redesignated Lr30.

scholarly journals Variabilitatea genotipurilor de colecţie de grâu (Triticum aestivum L.) în baza sensibilităţii la unele maladii fungice

2021 ◽  
Author(s):  
Nicolae Cristea ◽  
◽  
Galina Lupascu ◽  
Svetlana Gavzer ◽  
◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Common Wheat ◽  
Triticum Aestivum L ◽  
Brown Rust ◽  
Fungal Diseases ◽  
Extreme Drought ◽  
Initial Material ◽  
Breeding Programs ◽  
Wheat Genotypes ◽  
The Common

The common wheat genotypes under study showed a differentiated variability in terms of suscep-tibility to septoria, brown rust, spike fusariosis, which made it possible to differentiate them into clusters and identify those with higher resistance to these diseases. Based on the assessments from 2020-2021, the varieties Trubion, Numitor, Urbanus, Python, Miranda, Centurion, Amor, Aneta, Neven, Messino, Nasnaga, Tika-Taka, Judița, Avenue, Speranța, Dacia, Transilvania, Selania, Avânt which have shown resistance to extreme drought, fungal diseases and high indices of the spike productivity elements can be recommended as the initial material for the breeding programs.

scholarly journals Characterization of the common wheat (Triticum aestivum L.) mutation line producing three pistils in a floret

Hereditas ◽  
2004 ◽  
Vol 141 (1) ◽  
pp. 15-18 ◽  
Author(s):  
ZHENG-SONG PENG ◽  
JUN YANG ◽  
SHU-HONG WEI ◽  
JIAN-HONG ZENG
Keyword(s):  
Triticum Aestivum ◽  
Common Wheat ◽  
Triticum Aestivum L ◽  
The Common

Chromosome location and linkage of a new gene (Lr33) for reaction to Puccinia recondita in common wheat

Genome ◽  
1987 ◽  
Vol 29 (3) ◽  
pp. 463-466 ◽  
Author(s):  
P. L. Dyck ◽  
E. R. Kerber ◽  
O. M. Lukow
Keyword(s):  
Triticum Aestivum ◽  
Key Words ◽  
Common Wheat ◽  
Triticum Aestivum L ◽  
Translocation Breakpoint ◽  
Puccinia Recondita ◽  
Chromosome Location ◽  
Backcross Line ◽  
New Gene ◽  
Recombination Value

A gene for resistance to Puccinia recondita, originally detected in wheat (Triticum aestivum L.) accessions PI58548, PI268454, and PI268316, has been located on the long arm of chromosome 1B, 3.1 ± 1.2 crossover units from the centromere. In a cross between the backcross line RL6057 containing this new gene, now designated Lr33, and the backcross line RL6078 containing gene Lr26, gene Lr33 is closely linked to gene Lr26 (or the translocation breakpoint) with an estimated 2.6 ± 0.8 recombination value. RL6057 and RL6078 differ in gliadin bands that are controlled by genes on the short arm of chromosome 1B or 1R. The banding difference was completely associated with the presence or absence of Lr26. Key words: Triticum, Puccinia, linkage.

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