scholarly journals Identification of leaf rust resistance genes in common wheat varieties from China and foreign countries

2021 ◽  
Vol 20 (5) ◽  
pp. 1302-1313
Author(s):  
Yuan LIU ◽  
Takele Weldu GEBREWAHID ◽  
Pei-pei ZHANG ◽  
Zai-feng LI ◽  
Da-qun LIU
Author(s):  
E.R. Davoyan ◽  
◽  
L.A. Bespalova ◽  
R.O. Davoyan ◽  
E.V. Agaeva ◽  
...  

The article presents the results of the characterization of 277 lines of common wheat developed in the National Center of Grain named after P.P. Lukyanenko by the presence of molecular markers linked to leaf rust resistance genes Lr9, Lr19, Lr24, Lr37, Lr26. Lines with Lr9 and Lr19 were not identified. We detected 52 lines carrying Lr24; 80 lines with Lr26; 141 lines with Lr37. Lines carrying a combination of leaf rust resistance genes were selected using molecular markers. The presence of a combination of Lr37 + Lr26 was established in 31 lines. The combination of Lr24 + Lr26 was detected in 12 lines. Line 125-15 Ms 2 carries a combination of Lr37 + Lr24. A pyramid of three genes was found in the line 144-15 Ms 2. Currently, the selected lines are widely involved in the breeding process.


2007 ◽  
Vol 55 (2) ◽  
pp. 149-156 ◽  
Author(s):  
M. Gál ◽  
G. Vida ◽  
A. Uhrin ◽  
Z. Bedő ◽  
O. Veisz

The breeding and cultivation of resistant wheat varieties is an effective way of controlling leaf rust ( Puccinia triticina Eriks.). The use of molecular markers facilitates the incorporation of the major leaf rust resistance genes ( Lr genes) responsible for resistance into new varieties and the pyramiding of these genes. Marker-assisted selection was used to incorporate the Lr genes currently effective in Hungary ( Lr9 , Lr24 , Lr25 , Lr29 ) into winter wheat varieties. The Lr genes were identified using STS, SCAR and RAPD markers closely linked to them. Investigations were made on how these markers could be utilised in plant breeding, and near-isogenic lines resembling the recurrent variety but each containing a different Lr gene were developed to form the initial stock for the pyramiding of resistance genes. The results indicate that the marker-assisted selection technique elaborated for resistance genes Lr24 , Lr25 and Lr29 can be applied simply and effectively in wheat breeding, while the detection of the Lr9 marker is uncertain.


2008 ◽  
Vol 117 (3) ◽  
pp. 307-312 ◽  
Author(s):  
U. K. Bansal ◽  
M. J. Hayden ◽  
B. P. Venkata ◽  
R. Khanna ◽  
R. G. Saini ◽  
...  

2009 ◽  
Vol 35 (5) ◽  
pp. 316-319 ◽  
Author(s):  
E. I. Gul’tyaeva ◽  
I. A. Kanyuka ◽  
N. V. Alpat’eva ◽  
O. A. Baranova ◽  
A. P. Dmitriev ◽  
...  

2008 ◽  
Vol 59 (3) ◽  
pp. 197 ◽  
Author(s):  
B. S. Gill ◽  
L. Huang ◽  
V. Kuraparthy ◽  
W. J. Raupp ◽  
D. L. Wilson ◽  
...  

Wild relatives of wheat are useful sources of alien resistance genes for wheat breeding. The objective of this review is to document research on the evaluation, transfer, and molecular analysis of alien resistance to wheat leaf rust especially in Aegilops tauschii, the diploid D-genome donor of common wheat. Nine named resistance genes (Lr1, Lr2, Lr15, Lr21, Lr22, Lr32, Lr34, Lr39, and Lr42) occur in the D genome. Twelve new leaf rust resistance genes have been documented in Ae. tauschii. The south-west Caspian Sea region is the centre of genetic diversity for seedling resistance. Adult-plant resistance is widespread in all geographic regions and should be exploited more in the future. Lr1 and Lr21 have been cloned and are typical NBS-LRR genes. The recent documentation of cryptic introgressions of Lr57/Yr40 from Ae. geniculata and Lr58 from Ae. triuncialis offers exciting possibilities for transferring alien genes without linkage drag. Both Lr21 and Lr34 presumably arose during or following the origin of common wheat ~8000 years ago. Leaf rust resistance genes often are located towards the physical ends of wheat chromosomes. These regions are known to be high in recombination, and this may explain their rapid rate of evolution.


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