Leaf rust and stripe rust resistance genes transferred to common wheat from Triticum dicoccoides

Marais, G. F.; Pretorius, Z. A.; Wellings, C. R.; McCallum, Brent D.; Marais, Anna‐Susan

doi:10.1007/s10681-005-2911-6

Cited by 79 publications

(65 citation statements)

References 9 publications

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“…Inoculation procedures were as described by McCallum and Seto-Goh (2002). Genetic studies with the leaf and stripe rust resistance genes were done at Stellenbosch employing inoculation procedures described by Marais et al (2005a). P. triticina pathotype UVPrt8 and P. striiformis f. sp.…”

Section: Methodsmentioning

confidence: 99%

Leaf Rust and Stripe Rust Resistance Genes Derived from Aegilops Sharonensis

2006

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Linked leaf and stripe rust resistance genes introgressed into hexaploid wheat from Aegilops sharonensis provided protection in the seedling stage to a wide range of pathotypes of the two diseases. Monosomic and telosomic analyses showed that the resistance genes occur on wheat chromosome 6A. This result could be confirmed making use of mapped chromosome 6A microsatellite markers. The introgressed chromatin appeared to involve the proximal part of 6AL and the complete 6AS arm and it was thus not possible to deduce the chromosome arm harbouring the resistance genes. The resistance showed non-Mendelian transmission. The genetic background of a heterozygote interacted with the introgressed region to result in either preferential or impaired female transmission. Male transmission appeared to be affected in a different way from female transmission and was exclusive in the genetic background studied. Symbols Lr56 and Yr38 are proposed to designate the respective genes of which line 0352-4 is the appropriate source material.

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Section: Methodsmentioning

confidence: 99%

Leaf Rust and Stripe Rust Resistance Genes Derived from Aegilops Sharonensis

2006

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“…YrLM168a is likely different from Yr4a and Yr4b as it is effective against to CYR31, CYR32, and CYR33. Yr35 from Triticum dicoccoides has been located on chromosome 6BS with monosomic and telosomic analyses, C-banding, and RFLPs (Marais et al 2005). Yr36 from T. turgidum ssp.…”

Section: Discussionmentioning

confidence: 99%

Identification and mapping stripe rust resistance gene YrLM168a using extreme individuals and recessive phenotype class in a complicate genetic background

et al. 2015

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The identification and characterization of resistance genes effective against stripe rust of wheat is beneficial for modern wheat breeding programs. Molecular markers to such genes facilitate their deployment. The variety Milan has resistance that is effective against the predominant stripe rust races in the Sichuan region. Two resistant and two susceptible F8 lines from a cross between Milan and the susceptible variety Chuannong 16 were used to investigate inheritance of the Milan resistance. Three F2 populations were developed from crosses between the resistant lines and their susceptible sibling lines (LM168a × LM168c, LM168c × LM168a, LM168b × LM168d) and used for genetic analysis and molecular mapping of the genes for resistance. The stripe rust resistance in LM168a and LM168b was conferred by a single dominant gene, temporarily designated as YrLM168a. Forty-five extreme susceptible plants from the F2 families of LM168d × LM168b were genotyped with 836 simple sequence repeat (SSR) markers to map YrLM168a. YrLM168a was mapped in chromosome 6BL. The nearest flanking markers Xwmc756 and Xbarc146 were 4.6 and 4.6 cM away from the gene at both sides, respectively. The amplification results of twenty extreme resistant (IT 0) and susceptible (IT 4) F2 plants of LM168c × LM168a and LM168a × LM168c with marker Xwmc756 further validated the mapping results. The study suggested that extreme individuals and recessive phenotype class can be successfully used for mapping genes, which should be efficient and reliable. In addition, the flanking markers near YrLM168a should be helpful in marker-assisted breeding.

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“…Sixty-four genes for leaf rust resistance have been genetically characterised and formally named (McIntosh et al 2008). Resistance genes Lr3, Lr14a, Lr23, Lr53, Lr61 and Lr64 occur in both tetraploid and hexaploid wheats (Dyck and Samborski 1970;McIntosh and Dyck 1975;Marais et al 2005;HerreraFoessel et al 2005;Herrera-Foessel et al 2007). For example, Lr3 was mapped on chromosome 6BL both in durum wheat and common wheat genotypes (Herrera-Foessel et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Inheritance and chromosome location of leaf rust resistance in durum wheat cultivar Wollaroi

et al. 2010

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The Australian durum cultivar Wollaroi produced low leaf rust responses in the field since its release in 1993. A recombinant inbred line population was developed from a cross of Wollaroi with a susceptible landrace Bansi. Monogenic inheritance of low seedling leaf rust response against the Puccinia triticina pathotype 104-1,2,3,6,(7),(11),13 was observed. This gene was temporarily designated as LrWo. A DArT based map of Wollaroi/Bansi was used to determine the genomic location of LrWo and it was mapped in chromosome 5BS. Following enrichment of the DArT map of chromosome 5BS with SSR markers, LrWo was flanked by gwm234 (7.2 cM) and wPt-1420 (20.3 cM) distally and proximally, respectively. A previously characterised gene Lr52 was also located on the chromosome arm 5BS, proximal to gwm234. Based on genetic association with the marker gwm234 at a similar distance, we concluded that LrWo could be either Lr52 or is another allele of this locus. Based on infection type comparison the latter argument seems more plausible.

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Leaf rust and stripe rust resistance genes transferred to common wheat from Triticum dicoccoides

Cited by 79 publications

References 9 publications

Leaf Rust and Stripe Rust Resistance Genes Derived from Aegilops Sharonensis

Leaf Rust and Stripe Rust Resistance Genes Derived from Aegilops Sharonensis

Identification and mapping stripe rust resistance gene YrLM168a using extreme individuals and recessive phenotype class in a complicate genetic background

Inheritance and chromosome location of leaf rust resistance in durum wheat cultivar Wollaroi

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