Detecting Wheat Leaf Rust Resistance GeneLr13 in Seedlings

Plant Disease ◽  
1984 ◽  
Vol 68 (1) ◽  
pp. 585 ◽  
Author(s):  
Z. A. Pretorius
Keyword(s):  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Wheat Leaf Rust ◽  
Wheat Leaf

Comparative mapping of the two wheat leaf rust resistance loci Lr1 and Lr10 in rice and barley

Genome ◽  
1998 ◽  
Vol 41 (3) ◽  
pp. 328-336 ◽  
Author(s):  
Francesca Gallego ◽  
Catherine Feuillet ◽  
Monika Messmer ◽  
Anja Penger ◽  
Andreas Graner ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Comparative Mapping ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Wheat Leaf Rust ◽  
Wheat Leaf

Comparative mapping of the two wheat leaf rust resistance loci Lr1 and Lr10 in rice and barley

Genome ◽  
1998 ◽  
Vol 41 (3) ◽  
pp. 328-336 ◽  
Author(s):  
Francesca Gallego ◽  
Catherine Feuillet ◽  
Monika Messmer ◽  
Anja Penger ◽  
Andreas Graner ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Comparative Mapping ◽  
Rust Resistance ◽  
Repetitive Sequences ◽  
Rice Chromosome ◽  
Leaf Rust Resistance ◽  
Chromosome 1 ◽  
Wheat Leaf Rust ◽  
Wheat Leaf ◽  
Genomic Regions

The wheat genome is large, hexaploid, and contains a high amount of repetitive sequences. In order to isolate agronomically important genes from wheat by map-based cloning, a simpler model of the genome must be used for identifying candidate genes. The objective of this study was to comparatively map the genomic regions of two wheat leaf rust disease resistance loci, Lr1 and Lr10, in the putative model genomes of rice and barley. Two probes cosegregating with the Lr1 gene on chromosome 5DL of wheat were studied. The rice sequences corresponding to the two probes were isolated and mapped. The two probes mapped to two different rice chromosomes, indicating that the organization of the region orthologous to Lr1 is different in rice and wheat. In contrast, synteny was conserved between wheat and barley in this chromosomal region. The Lrk10 gene cosegregated with Lr10 on chromosome 1AS in wheat. The rice gene corresponding to Lrk10 was mapped on rice chromosome 1, where it occurred in many copies. This region on rice chromosome 1 corresponds to the distal part of the group 3S chromosomes in Triticeae. The synteny is conserved between rice chromosome 1 and the Triticeae group 3S chromosomes up to the telomere of the chromosomes. On group 3S chromosomes, we found a gene that is partially homologous to Lrk10. We conclude that in the genomic regions studied, there is limited and only partially useful synteny between wheat and rice. Therefore, barley should also be considered as a model genome for isolating the Lr1 and Lr10 genes from wheat.Key words: barley, comparative mapping, leaf rust, resistance genes, rice, synteny, wheat.

scholarly journals Highly predictive SNP markers for efficient selection of the wheat leaf rust resistance gene Lr16

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Mulualem T. Kassa ◽  
Frank M. You ◽  
Colin W. Hiebert ◽  
Curtis J. Pozniak ◽  
Pierre R. Fobert ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Resistance Gene ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Snp Markers ◽  
Leaf Rust Resistance Gene ◽  
Wheat Leaf Rust ◽  
Wheat Leaf ◽  
Efficient Selection ◽  
Selection Of

scholarly journals Performance of Four New Leaf Rust Resistance Genes Transferred to Common Wheat from Aegilops tauschii and Triticum monococcum

Plant Disease ◽  
1997 ◽  
Vol 81 (6) ◽  
pp. 582-586 ◽  
Author(s):  
T. Hussien ◽  
R. L. Bowden ◽  
B. S. Gill ◽  
T. S. Cox ◽  
D. S. Marshall
Keyword(s):  
Leaf Rust ◽  
Resistance Genes ◽  
Rust Resistance ◽  
Aegilops Tauschii ◽  
Leaf Rust Resistance ◽  
Wheat Leaf Rust ◽  
Wheat Leaf ◽  
Moderately Resistant ◽  
Rust Resistance Genes ◽  
Leaf Rust Resistance Genes

The objective of this study was to test the performance of four new wheat leaf rust resistance genes previously transferred from wild relatives of common wheat. Leaf rust resistance gene Lr43, in wheat germplasm line KS92WGRC16, was originally from Aegilops tauschii. A second resistance gene, in line KS92WGRC23, was transferred from Triticum monococcum var. monococcum. Two other genes, in lines KS93U3 and KS96WGRC34, were obtained from T. monococcum var. boeoticum. In greenhouse tests, the typical low infection types produced by these lines were fleck (;), immune (0), fleck with chlorosis (;C), and heterogeneous (X-) for KS92WGRC16, KS92WGRC23, KS96WGRC34, and KS93U3, respectively. In field tests in Kansas and Texas, KS92WGRC23 and KS92WGRC16 were highly resistant. KS93U3 was moderately resistant in Kansas but moderately resistant to moderately susceptible in Texas. KS96WGRC34 was moderately resistant in Kansas but moderately resistant to susceptible in Texas. Greenhouse adult-plant tests with race PBJL of Puccinia recondita f. sp. tritici indicated that KS92WGRC16, KS92WGRC23, and KS96WGRC34 were highly resistant, but KS93U3 gave a moderately resistant reaction. Growth-chamber studies in different environments (12, 16, 20, and 24°C) showed slight temperature effects on the expression of resistance in KS96WGRC34 but not in the other lines. Tests with nine races of P. recondita f. sp. tritici indicated that only KS92WGRC16 was resistant to all the races. Races PNML and PNMQ were virulent on KS92WGRC23, and race TFGL was virulent on both KS93U3 and KS96WGRC34. The genes in the four germplasm lines should be used in combination with other resistance genes to prolong their usefulness.

Wheat leaf rust resistance geneLr59derived fromAegilops peregrina

2008 ◽  
Vol 127 (4) ◽  
pp. 340-345 ◽  
Author(s):  
G. F. Marais ◽  
B. McCallum ◽  
A. S. Marais
Keyword(s):  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Wheat Leaf Rust ◽  
Wheat Leaf
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