scholarly journals Introgression of leaf rust and stripe rust resistance from Sharon goatgrass (Aegilops sharonensis Eig) into bread wheat (Triticum aestivum L.)

Genome ◽  
2014 ◽  
Vol 57 (6) ◽  
pp. 309-316 ◽  
Author(s):  
E. Millet ◽  
J. Manisterski ◽  
P. Ben-Yehuda ◽  
A. Distelfeld ◽  
J. Deek ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Wheat Chromosome ◽  
Triticum Aestivum L ◽  
The United States ◽  
Stripe Rust Resistance ◽  
Wheat Diseases ◽  
Aegilops Sharonensis ◽  
Resistant Varieties

Leaf rust and stripe rust are devastating wheat diseases, causing significant yield losses in many regions of the world. The use of resistant varieties is the most efficient way to protect wheat crops from these diseases. Sharon goatgrass (Aegilops sharonensis or AES), which is a diploid wild relative of wheat, exhibits a high frequency of leaf and stripe rust resistance. We used the resistant AES accession TH548 and induced homoeologous recombination by the ph1b allele to obtain resistant wheat recombinant lines carrying AES chromosome segments in the genetic background of the spring wheat cultivar Galil. The gametocidal effect from AES was overcome by using an “anti-gametocidal” wheat mutant. These recombinant lines were found resistant to highly virulent races of the leaf and stripe rust pathogens in Israel and the United States. Molecular DArT analysis of the different recombinant lines revealed different lengths of AES segments on wheat chromosome 6B, which indicates the location of both resistance genes.

Transfer of leaf rust and stripe rust resistance from Aegilops umbellulata Zhuk. to bread wheat (Triticum aestivum L.)

2007 ◽  
Vol 55 (6) ◽  
pp. 849-859 ◽  
Author(s):  
Parveen Chhuneja ◽  
Satinder Kaur ◽  
R. K. Goel ◽  
M. Aghaee-Sarbarzeh ◽  
M. Prashar ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Leaf Rust ◽  
Bread Wheat ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Triticum Aestivum L ◽  
Stripe Rust Resistance ◽  
Aegilops Umbellulata

Allelic analysis of stripe rust resistance genes on wheat chromosome 2BS

Genome ◽  
2008 ◽  
Vol 51 (11) ◽  
pp. 922-927 ◽  
Author(s):  
P. G. Luo ◽  
X. Y. Hu ◽  
Z. L. Ren ◽  
H. Y. Zhang ◽  
K. Shu ◽  
...  
Keyword(s):  
Ssr Markers ◽  
Stripe Rust ◽  
Resistance Genes ◽  
Rust Resistance ◽  
Dominant Gene ◽  
Wheat Chromosome ◽  
Stripe Rust Resistance ◽  
Resistance Response ◽  
Rust Resistance Genes ◽  
Yr Genes

Stripe rust, caused by Puccinia striiormis Westend f. sp. tritici, is one of the most important foliar diseases of wheat ( Triticum aestivum L.) worldwide. Stripe rust resistance genes Yr27, Yr31, YrSp, YrV23, and YrCN19 on chromosome 2BS confer resistance to some or all Chinese P. striiormis f. sp. tritici races CYR31, CYR32, SY11-4, and SY11-14 in the greenhouse. To screen microsatellite (SSR) markers linked with YrCN19, F1, F2, and F3 populations derived from cross Ch377/CN19 were screened with race CYR32 and 35 SSR primer pairs. Linkage analysis indicated that the single dominant gene YrCN19 in cultivar CN19 was linked with SSR markers Xgwm410, Xgwm374, Xwmc477, and Xgwm382 on chromosome 2BS with genetic distances of 0.3, 7.9, 12.3, and 21.2 cM, respectively. Crosses of CN19 with wheat lines carrying other genes on chromosome 2B showed that all were located at different loci. YrCN19 is thus different from the other reported Yr genes in chromosomal location and resistance response and was therefore named Yr41. Prospects and strategies of using Yr41 and other Yr genes in wheat improvement for stripe rust resistance are discussed.

scholarly journals The potential of hybrid breeding to enhance leaf rust and stripe rust resistance in wheat

2020 ◽  
Vol 133 (7) ◽  
pp. 2171-2181 ◽  
Author(s):  
Ulrike Beukert ◽  
Guozheng Liu ◽  
Patrick Thorwarth ◽  
Philipp H. G. Boeven ◽  
C. Friedrich H. Longin ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Hybrid Breeding ◽  
Stripe Rust Resistance

scholarly journals Development and Cytomolecular Identification of Monosomic Alien Addition and Substitution Lines of Triticale (×Triticosecale Wittmack) With 2Sk Chromosome Conferring Leaf Rust Resistance Derived From Aegilops kotschyi Boiss

2020 ◽  
Vol 11 ◽  
Author(s):  
Michał T. Kwiatek ◽  
Waldemar Ulaszewski ◽  
Jolanta Belter ◽  
Dylan Phillips ◽  
Roksana Skowrońska ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Stripe Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Stripe Rust Resistance ◽  
Chromosome Engineering ◽  
Substitution Lines ◽  
Starting Point ◽  
Monosomic Addition ◽  
Triticosecale Wittmack

Alien chromosome introgression has become a valuable tool to broaden the genetic variability of crop plants via chromosome engineering. This study details the procedure to obtain monosomic addition and monosomic substitution lines of the triticale carrying 2Sk chromosome from Aegilops kotchyi Boiss., which harbors Lr54 + Yr37 leaf and stripe rust-resistant gene loci, respectively. Initially, A. kotschyi × Secale cereale artificial amphiploids (2n = 6x = 42 chromosomes, UUSSRR) were crossed with triticale cv. “Sekundo” (2n = 6x = 42, AABBRR) in order to obtain fertile offspring. Cyto-molecular analyses of five subsequent backcrossing generations revealed that 2Sk chromosome was preferentially transmitted. This allowed for the selection of monosomic 2Sk addition (MA2Sk) lines of triticale. Finally, the 2Sk(2R) substitution plants were obtained by crossing MA2Sk with the nullisomic (N2R) plants of triticale. The presence of 2Sk chromosome in subsequent generations of plants was evaluated using SSR markers linked to Lr54 + Yr37 loci. Disease evaluation of the monosomic 2Sk(2R) substitution plants for the reaction to leaf and stripe rust infection were carried out under controlled conditions in a growth chamber. The results showed significant improvement of leaf rust resistance severity of monosomic substitution plants compared with control (“Sekundo”). In contrast, the introgression of the Lr54 + Yr37 loci did not lead to improvement of stripe rust resistance. In summary, the creation of monosomic addition and monosomic substitution lines of triticale is the starting point for the precise and guided transfer of Lr54 + Yr37 loci. The results showed that the developed materials could be exploited for the development of triticale varieties with resistance to leaf rust.

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