scholarly journals Fine Mapping of the Wheat Leaf Rust Resistance Gene Lr42

2019 ◽  
Vol 20 (10) ◽  
pp. 2445 ◽  
Author(s):  
Harsimardeep S. Gill ◽  
Chunxin Li ◽  
Jagdeep S. Sidhu ◽  
Wenxuan Liu ◽  
Duane Wilson ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Hexaploid Wheat ◽  
Rust Resistance ◽  
Reference Genome ◽  
Aegilops Tauschii ◽  
Leaf Rust Resistance ◽  
Wheat Breeding ◽  
Chromosome 1 ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene

Leaf rust caused by Puccinia triticina Eriks is one of the most problematic diseases of wheat throughout the world. The gene Lr42 confers effective resistance against leaf rust at both seedling and adult plant stages. Previous studies had reported Lr42 to be both recessive and dominant in hexaploid wheat; however, in diploid Aegilops tauschii (TA2450), we found Lr42 to be dominant by studying segregation in two independent F2 and their F2:3 populations. We further fine-mapped Lr42 in hexaploid wheat using a KS93U50/Morocco F5 recombinant inbred line (RIL) population to a 3.7 cM genetic interval flanked by markers TC387992 and WMC432. The 3.7 cM Lr42 region physically corresponds to a 3.16 Mb genomic region on chromosome 1DS based on the Chinese Spring reference genome (RefSeq v.1.1) and a 3.5 Mb genomic interval on chromosome 1 in the Ae. tauschii reference genome. This region includes nine nucleotide-binding domain leucine-rich repeat (NLR) genes in wheat and seven in Ae. tauschii, respectively, and these are the likely candidates for Lr42. Furthermore, we developed two kompetitive allele-specific polymorphism (KASP) markers (SNP113325 and TC387992) flanking Lr42 to facilitate marker-assisted selection for rust resistance in wheat breeding programs.

The transfer of leaf rust resistance from Triticum turgidum ssp. dicoccoides to hexaploid wheat

1994 ◽  
Vol 74 (4) ◽  
pp. 671-673 ◽  
Author(s):  
P. L. Dyck
Keyword(s):  
Genetic Diversity ◽  
Genetic Analysis ◽  
Leaf Rust ◽  
Resistance Gene ◽  
Hexaploid Wheat ◽  
Rust Resistance ◽  
Triticum Turgidum ◽  
Leaf Rust Resistance ◽  
Rust Resistance Gene ◽  
Leaf Rust Resistance Gene

Accession 8404 of Triticum turgidum ssp. dicoccoides was shown to have excellent resistance to leaf rust. Genetic analysis of the F3 of 8404 and RL6089, a leaf rust susceptible durum, indicated that 8404 had three genes for leaf rust resistance. Two of these genes were transferred to hexaploid wheat (Thatcher) by a series of backcrosses. One of the genes transferred was the same as Lr33 (RL6057). The second gene, which gives a fleck reaction to avirulent P. recondita races, appears to be fully incorporated into the hexaploid where it segregated to fit a one-gene ratio. Backcross lines with this gene give excellent resistance to leaf rust, although race MBG is virulent to this gene. This may be a previously unidentified leaf rust resistance gene and should increase the genetic diversity available for wheat breeders. Key words:Triticum aestivum, wheat, Triticum turgidum ssp. dicoccoides, leaf rust resistance

Fine mapping of LrSV2, a race-specific adult plant leaf rust resistance gene on wheat chromosome 3BS

2014 ◽  
Vol 127 (5) ◽  
pp. 1133-1141 ◽  
Author(s):  
M. J. Diéguez ◽  
M. F. Pergolesi ◽  
S. M. Velasquez ◽  
L. Ingala ◽  
M. López ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Resistance Gene ◽  
Fine Mapping ◽  
Rust Resistance ◽  
Wheat Chromosome ◽  
Leaf Rust Resistance ◽  
Rust Resistance Gene ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Plant Leaf

scholarly journals A novel adult plant leaf rust resistance gene Lr2K38 mapped on wheat chromosome 1AL

2020 ◽  
Vol 13 (3) ◽  
Author(s):  
Suraj Sapkota ◽  
Mohamed Mergoum ◽  
Ajay Kumar ◽  
Jason D. Fiedler ◽  
Jerry Johnson ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Resistance Gene ◽  
Rust Resistance ◽  
Wheat Chromosome ◽  
Leaf Rust Resistance ◽  
Rust Resistance Gene ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Plant Leaf

Development of a molecular marker for the adult plant leaf rust resistance gene Lr35 in wheat

1999 ◽  
Vol 99 (3-4) ◽  
pp. 554-560 ◽  
Author(s):  
R. Seyfarth ◽  
C. Feuillet ◽  
G. Schachermayr ◽  
M. Winzeler ◽  
B. Keller
Keyword(s):  
Molecular Marker ◽  
Leaf Rust ◽  
Resistance Gene ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Rust Resistance Gene ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Plant Leaf

scholarly journals Microsatellite mapping of adult-plant leaf rust resistance gene Lr22a in wheat

2007 ◽  
Vol 115 (6) ◽  
pp. 885-886 ◽  
Author(s):  
Colin W. Hiebert ◽  
Julian B. Thomas ◽  
Daryl J. Somers ◽  
Brent D. McCallum ◽  
Stephen L. Fox
Keyword(s):  
Leaf Rust ◽  
Resistance Gene ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Rust Resistance Gene ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Plant Leaf ◽  
Microsatellite Mapping

scholarly journals Fine Mapping of the Leaf Rust Resistance Gene Lr65 in Spelt Wheat ‘Altgold’

2021 ◽  
Vol 12 ◽  
Author(s):  
Qiang Zhang ◽  
Wenxin Wei ◽  
Xiangxi Zuansun ◽  
Shengnan Zhang ◽  
Chen Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Linkage Map ◽  
Leaf Rust ◽  
Resistance Gene ◽  
Genetic Linkage ◽  
Rust Resistance ◽  
Genetic Linkage Map ◽  
Reference Genome ◽  
Leaf Rust Resistance ◽  
Leaf Rust Resistance Gene

Wheat leaf rust (also known as brown rust), caused by the fungal pathogen Puccinia triticina Erikss. (Pt), is one by far the most troublesome wheat disease worldwide. The exploitation of resistance genes has long been considered as the most effective and sustainable method to control leaf rust in wheat production. Previously the leaf rust resistance gene Lr65 has been mapped to the distal end of chromosome arm 2AS linked to molecular marker Xbarc212. In this study, Lr65 was delimited to a 0.8 cM interval between flanking markers Alt-64 and AltID-11, by employing two larger segregating populations obtained from crosses of the resistant parent Altgold Rotkorn (ARK) with the susceptible parents Xuezao and Chinese Spring (CS), respectively. 24 individuals from 622 F2 plants of crosses between ARK and CS were obtained that showed the recombination between Lr65 gene and the flanking markers Alt-64 and AltID-11. With the aid of the CS reference genome sequence (IWGSC RefSeq v1.0), one SSR marker was developed between the interval matched to the Lr65-flanking marker and a high-resolution genetic linkage map was constructed. The Lr65 was finally located to a region corresponding to 60.11 Kb of the CS reference genome. The high-resolution genetic linkage map founded a solid foundation for the map-based cloning of Lr65 and the co-segregating marker will facilitate the marker-assisted selection (MAS) of the target gene.

An interchromosomal reciprocal translocation in wheat involving leaf rust resistance gene Lr34

Genome ◽  
1994 ◽  
Vol 37 (4) ◽  
pp. 556-559 ◽  
Author(s):  
P. L. Dyck ◽  
E. R. Kerber ◽  
T. Aung
Keyword(s):  
Leaf Rust ◽  
Resistance Gene ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Rust Resistance Gene ◽  
Adult Plant ◽  
Leaf Rust Resistance Gene ◽  
Wheat Leaf Rust ◽  
Wheat Leaf ◽  
Mother Cells

'Thatcher' backcross lines RL6058 and RL6077 have adult-plant leaf rust resistance and were believed to have Lr34. However, genetic analysis revealed that the genes in the two lines were independent of each other. Previous work demonstrated that Lr34 is located on chromosome 7D. The leaf rust resistance gene in RL6058 must be on chromosome 7DS because no recombinants were observed between it and gene Lr29, known to be on chromosome 7DS. It was also linked with Rc3 (30.25 ± 2.88%), a gene for purple coleoptile on chromosome 7DS. It was independent of Lr19 and NS1 (nonsuppressor mutant), which are located on 7DL. The leaf rust resistance gene in RL6077 was independent of genes Lr19 and Lr29. The presence of quadrivalents in pollen mother cells of the RL6058/RL6077 hybrid indicates that the Lr34 gene in RL6077 may have been translocated onto another chromosome. Lr34 from RL6058 and RL6077 may have been combined in four F3 lines derived from their intercross.Key words: Triticum aestivum, wheat, leaf rust resistance.

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