scholarly journals Identification of Sr genes in new common wheat sources of resistance to stem rust race Ug99 using molecular markers

2015 ◽  
Vol 19 (3) ◽  
pp. 316 ◽  
Author(s):  
O. A. Baranova ◽  
I. F. Lapochkina ◽  
A. V. Anisimova ◽  
N. R. Gajnullin ◽  
I. V. Iordanskaya ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Common Wheat ◽  
Stem Rust ◽  
Sources Of Resistance ◽  
Sr Genes

Identification of Sr genes in new common wheat sources of resistance to stem rust race Ug99 using molecular markers

2016 ◽  
Vol 6 (3) ◽  
pp. 344-350 ◽  
Author(s):  
O. A. Baranova ◽  
I. F. Lapochkina ◽  
A. V. Anisimova ◽  
N. R. Gajnullin ◽  
I. V. Iordanskaya ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Common Wheat ◽  
Stem Rust ◽  
Sources Of Resistance ◽  
Sr Genes

scholarly journals The development of winter wheat lines with several genes for resistance to Puccinia graminis Pers. f. sp. tritici for use in breeding programs in Russia

2018 ◽  
Vol 22 (6) ◽  
pp. 676-684 ◽  
Author(s):  
I. F. Lapochkina ◽  
O. A. Baranova ◽  
N. R. Gainullin ◽  
G. V.  Volkova ◽  
E. V. Gladkova ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Winter Wheat ◽  
Common Wheat ◽  
Russian Federation ◽  
Stem Rust ◽  
Puccinia Graminis ◽  
Initial Material ◽  
Sources Of Resistance ◽  
The Russian Federation ◽  
Wheat Lines

The aim of this research is to develop for the Russian Federation Non-Cher nozem Zone competitive prototypes of winter wheat cul tivars with several genes for resistance to stem rust (in clu ding race Ug99) based on new sources of resistance with the use of molecular markers. The individual plants and then lines of winter common wheat with several effective genes for resistance to race Ug99 of stem rust were selected by means of marker assistant selection out of hybrid combinations from the crossing of new donors of resistance to this dangerous disease. The development of initial material was based on the use of new sources of resistance to race Ug99 of stem rust from VIR and “Arsenal” collections. Three accessions of winter wheat (wheat-aegi lops-rye line 119/4-06rw, cv. Donskaya Polukarlikovaya, line GT 96|90 from Bulgaria) and one accession of spring wheat (line 113/00i-4 with genetic material from Aegilops triuncialis), which supplemented and contrasted each other in such economically valuable features as plant height, number of days before heading, resistance to powdery mildew and leaf rust, were selected for hybridization and backcrossing. To accelerate the breeding process, resistant genotypes with Sr genes were selected with the use of molecular markers. As a result the lines of winter common wheat with a set of economically valuable features and the presence of two-four genes for resistance to stem rust in homozygote state were created. The spectrum of the stem rust gene combinations in the created lines differs from the gene combinations in the parental accessions involved in the crossing and is associated with the direction of the selections conducted by the marker assisted selection method. We discovered more than 20 different combinations of the Sr2, Sr22, Sr31, Sr32, Sr36, Sr39, Sr40 and Sr47 genes in winter wheat lines. The combination of Sr22 and Sr32 in homozygote state was most often found. The genotypes with a set of economically valuable features approximating or surpassing the standard cultivar of winter wheat Moskov skaya 39 were selected for further testing in breeding nurseries of the Moscow region. The developed initial material is intended for use in selection of winter wheat cultivars resistant to stem rust in different grain-sowing regions of the Russian Federation. This will serve as a barrier for spread of new races of Puccinia graminis and will raise the resistance of selected cultivars to local populations of stem rust.

scholarly journals Sources of Stem Rust Resistance in Wheat-Alien Introgression Lines

Plant Disease ◽  
2016 ◽  
Vol 100 (6) ◽  
pp. 1101-1109 ◽  
Author(s):  
Mahbubjon Rahmatov ◽  
Matthew N. Rouse ◽  
Brian J. Steffenson ◽  
Staffan C. Andersson ◽  
Ruth Wanyera ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Resistance Genes ◽  
Stem Rust ◽  
Rust Resistance ◽  
Stem Rust Resistance ◽  
Introgression Lines ◽  
Resistance Pattern ◽  
Sources Of Resistance ◽  
Alien Introgression ◽  
New Genes

Stem rust is one of the most devastating diseases of wheat. Widely virulent races of the pathogen in the Ug99 lineage (e.g., TTKSK) are threatening wheat production worldwide; therefore, there is an urgent need to enhance the diversity of resistance genes in the crop. The objectives of this study were to identify new sources of resistance in wheat-alien introgression derivatives from Secale cereale, Leymus mollis, L. racemosus, and Thinopyrum junceiforme, postulate genes conferring the resistance, and verify the postulated genes by use of molecular markers. From seedling tests conducted in the greenhouse, the presence of seven known stem rust resistance genes (Sr7b, Sr8a, Sr9d, Sr10, Sr31, Sr36, and SrSatu) was postulated in the wheat-alien introgression lines. More lines possessed a high level of resistance in the field compared with the number of lines that were resistant at the seedling stage. Three 2R (2D) wheat-rye substitution lines (SLU210, SLU238, and SLU239) seemed likely to possess new genes for resistance to stem rust based on their resistance pattern to 13 different stem rust races but the genes responsible could not be identified. Wheat-rye, wheat-L. racemosus, and wheat-L. mollis substitutions or translocations with single and multiple interchanges of chromosomes, in particular of the B and D chromosomes of wheat, were verified by a combination of genomic in situ hybridization and molecular markers. Thus, the present study identified novel resistance genes originating from different alien introgressions into the wheat genome of the evaluated lines. Such genes may prove useful in enhancing the diversity of stem rust resistance in wheat against widely virulent pathogen races such as those in the Ug99 lineage.

The association of a gene for leaf rust resistance with the chromosome 7D suppressor of stem rust resistance in common wheat

Genome ◽  
1987 ◽  
Vol 29 (3) ◽  
pp. 467-469 ◽  
Author(s):  
P. L. Dyck
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Suppressor Gene ◽  
Stem Rust Resistance ◽  
Recurrent Parent ◽  
Cytogenetic Evidence

Backcross lines of gene LrT2 for resistance to leaf rust in the common wheat (Triticum aestivum L.) 'Thatcher' unexpectedly show improved resistance to stem rust compared with that of the recurrent parent. Genetic–cytogenetic evidence indicates that LrT2 is on chromosome 7D, which is known to carry the "suppressor" gene(s) that prevent the expression of stem rust resistance conferred by other genes in 'Canthatch'. Thus, LrT2 may be a nonsuppressing allele of the suppressor gene(s) or be closely linked to such an allele. LrT2 has been designated Lr34. Key words: Triticum, wheat, rust resistance.

scholarly journals Characterization of Wheat Monogenic Lines with Known Sr Genes and Wheat Lines with Resistance to the Ug99 Race Group for Resistance to Prevalent Races of Puccinia graminis f. sp. tritici in China

Plant Disease ◽  
2020 ◽  
Vol 104 (7) ◽  
pp. 1939-1943
Author(s):  
Xian Xin Wu ◽  
Qiu Jun Lin ◽  
Xin Yu Ni ◽  
Qian Sun ◽  
Rong Zhen Chen ◽  
...  
Keyword(s):  
Food Security ◽  
Stem Rust ◽  
Adult Plant ◽  
Puccinia Graminis ◽  
Wheat Cultivars ◽  
Wheat Stem Rust ◽  
Wheat Improvement ◽  
Wheat Lines ◽  
Sr Genes

Wheat stem rust, caused by Puccinia graminis f. sp. tritici, is one of the most serious fungal diseases in wheat production, seriously threatening the global supply of wheat and endangering food security. The present study was conducted to evaluate wheat monogenic lines with known Sr genes to the most prevalent P. graminis f. sp. tritici races in China. In addition, wheat lines introduced from the International Maize and Wheat improvement Center (CIMMYT) with resistance to the Ug99 race group were also evaluated with the prevalent Chinese P. graminis f. sp. tritici races. The monogenic lines containing Sr9e, Sr21, Sr26, Sr31, Sr33, Sr35, Sr37, Sr38, Sr47, and SrTt3 were effective against races 21C3CTTTM, 34C0MRGSM, and 34C3MTGQM at both seedling and adult-plant stages. In contrast, monogenic lines containing Sr6, Sr7b, Sr8a, Sr9a, Sr9b, Sr9d, Sr9f, Sr9g, Sr13, Sr16, Sr18, Sr19, Sr20, Sr24, Sr28, Sr29, and Sr34 were highly susceptible to these races at both seedling and adult-plant stages. Lines with Sr5, Sr10, Sr13, Sr14, Sr15, Sr17, Sr21, Sr22, Sr23, Sr25, Sr27, Sr29, Sr30, Sr32, Sr36, and Sr39 were resistant to one or more of the tested races. Among the 123 CIMMYT lines, 38 (30.9%) showed varying levels of susceptibility to Chinese P. graminis f. sp. tritici races. The results should be useful for breeding wheat cultivars with resistance to stem rust.

The effectiveness of molecular markers for the identification of Lr28, Lr35, and Lr47 genes in common wheat

2014 ◽  
Vol 50 (2) ◽  
pp. 131-139 ◽  
Author(s):  
E. I. Gultyaeva ◽  
A. S. Orina ◽  
Ph. B. Gannibal ◽  
O. P. Mitrofanova ◽  
I. G. Odintsova ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Common Wheat

scholarly journals Identification of stem rust resistance genes in wheat cultivars in China using molecular markers

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4882 ◽  
Author(s):  
Xiaofeng Xu ◽  
Depeng Yuan ◽  
Dandan Li ◽  
Yue Gao ◽  
Ziyuan Wang ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Resistance Genes ◽  
Stem Rust ◽  
Rust Resistance ◽  
Genetic Material ◽  
Stem Rust Resistance ◽  
Wheat Cultivars ◽  
Wheat Stem Rust ◽  
Stem Rust Resistance Genes ◽  
Rust Resistance Genes

Wheat stem rust caused by Puccinia graminis f. sp. tritici Eriks. & E. Henn. (Pgt), is a major disease that has been effectively controlled using resistance genes. The appearance and spread of Pgt races such as Ug99, TKTTF, and TTTTF, which are virulent to most stem rust-resistant genes currently deployed in wheat breeding programs, renewed the interest in breeding cultivars resistant to wheat stem rust. It is therefore important to investigate the levels of resistance or vulnerability of wheat cultivars to Pgt races. Resistance to Pgt races 21C3CTHQM, 34MKGQM, and 34C3RTGQM was evaluated in 136 Chinese wheat cultivars at the seedling stage. A total of 124 cultivars (91.2%) were resistant to the three races. Resistance genes Sr2, Sr24, Sr25, Sr26, Sr31, and Sr38 were analyzed using molecular markers closely linked to them, and 63 of the 136 wheat cultivars carried at least one of these genes: 21, 25, and 28 wheat cultivars likely carried Sr2, Sr31, and Sr38, respectively. Cultivars “Kehan 3” and “Jimai 22” likely carried Sr25. None of the cultivars carried Sr24 or Sr26. These cultivars with known stem rust resistance genes provide valuable genetic material for breeding resistant wheat cultivars.

scholarly journals Validation of Molecular Markers for New Stem Rust Resistance Genes in U.S. Hard Winter Wheat

Crop Science ◽  
2013 ◽  
Vol 53 (3) ◽  
pp. 755-764 ◽  
Author(s):  
Amy N. Bernardo ◽  
Robert L. Bowden ◽  
Matthew N. Rouse ◽  
Maria S. Newcomb ◽  
David S. Marshall ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Winter Wheat ◽  
Resistance Genes ◽  
Stem Rust ◽  
Rust Resistance ◽  
Stem Rust Resistance ◽  
Stem Rust Resistance Genes ◽  
Rust Resistance Genes
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