Phenotypic and genetic diversity of leaf rust resistance in wheat wild relatives

2020 ◽  
Vol 168 (7-8) ◽  
pp. 428-438
Author(s):  
Ali Aliakbari Sadeghabad ◽  
Ali Dadkhodaie ◽  
Bahram Heidari
Keyword(s):  
Genetic Diversity ◽  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Wild Relatives ◽  
Wheat Wild Relatives ◽  
Phenotypic And Genetic Diversity

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

Mechanism of leaf rust resistance in wheat wild relatives, Triticum monococcum and T. boeoticum

2021 ◽  
pp. 1-8
Author(s):  
Amandeep K. Riar ◽  
Parveen Chhuneja ◽  
Beat Keller ◽  
Kuldeep Singh
Keyword(s):  
Leaf Rust ◽  
Laser Scanning ◽  
Rust Resistance ◽  
Resistance Mechanism ◽  
Leaf Rust Resistance ◽  
Wheat Breeding ◽  
Wild Relatives ◽  
Triticum Monococcum ◽  
Laser Scanning Microscopy ◽  
Confocal Laser

Abstract Triticum monococcum L. and T. boeoticum L., diploid wild relatives of bread wheat (T. aestivum L.), possess resistance to leaf rust (also known as brown rust) caused by Puccinia triticina Eriks. Haustorium formation-based resistance mechanisms (i.e. pre-haustorial and post-haustorial resistance) to leaf rust have been studied and reported in various T. monococcum accessions. In the present study, the mechanism of leaf rust resistance in T. monococcum and T. boeoticum accessions was studied using confocal laser scanning microscopy. Components of resistance studied at a histological level against leaf rust pathotypes, a Mexican pathotype (TCB/TD) and a Swiss pathotype (97512-19), indicated different types of resistance mechanism operative in the two accessions. The resistance in T. monococcum ranged from pre-haustorial resistance against 97512-19 to post-haustorial resistance against TCB/TD. The response in T. boeoticum was post-haustorial with necrosis against the two pathotypes. Pre-haustorial resistance observed in T. monococcum could serve as a potential source of durable rust resistance in wheat breeding.

scholarly journals Identification of New Leaf Rust Resistance Loci in Wheat and Wild Relatives by Array-Based SNP Genotyping and Association Genetics

2020 ◽  
Vol 11 ◽  
Author(s):  
Fizza Fatima ◽  
Brent D. McCallum ◽  
Curtis J. Pozniak ◽  
Colin W. Hiebert ◽  
Curt A. McCartney ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Wild Relatives ◽  
Snp Genotyping ◽  
Association Genetics

Stem and leaf rust resistance in wild relatives of wheat with D genome (Aegilops spp.)

2014 ◽  
Vol 61 (4) ◽  
pp. 861-874 ◽  
Author(s):  
V. K. Vikas ◽  
M. Sivasamy ◽  
J. Kumar ◽  
P. Jayaprakash ◽  
Sundeep Kumar ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Wild Relatives ◽  
D Genome

Lr80: A new and widely effective source of leaf rust resistance of wheat for enhancing diversity of resistance among modern cultivars

2021 ◽  
Author(s):  
Subodh Kumar ◽  
Subhash C. Bhardwaj ◽  
Om P. Gangwar ◽  
Akanksha Sharma ◽  
Naeela Qureshi ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Effective Source
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