Isolation of complementary genes conditioning crown rust resistance in the oat variety Bond

Baker, E. P.

doi:10.1007/bf00022174

Cited by 20 publications

(8 citation statements)

References 3 publications

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“…The presence of complementary genes for resistance to the wheat leaf rust pathogen (P. triticina Erikss.) Baker (1966) earlier confirmed the presence of complementary resistance genes in 'Bond' oats in response to the crown rust pathogen (P. coronata Corda f. sp. Baker (1966) earlier confirmed the presence of complementary resistance genes in 'Bond' oats in response to the crown rust pathogen (P. coronata Corda f. sp.…”

Section: Introductionmentioning

confidence: 72%

Complementary resistance genes in wheat selection ‘Avocet R’ confer resistance to stripe rust

et al. 2015

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Complementary genes for resistance to wheat stripe rust in an Avocet selection mapped to chromosome arms 3DL and 5BL. Susceptible Avocet selections lacked the 5BL gene due to a chromosomal deletion. This study reports the inheritance and genetic mapping of the YrA (temporary name of convenience to describe the specificity) seedling resistance to wheat stripe rust (caused by Puccinia striiformis f. sp. tritici; Pst) in a resistant selection of the Australian cv. Avocet [Avocet R (AvR)-AUS 90660]. Genetic analysis was performed on F2 populations and F3 generation families from crosses between wheats that carried and lacked the YrA resistance. Greenhouse seedling tests with two avirulent Pst pathotypes (104 E137 A- and 108 E141 A-) confirmed that the YrA resistance was inherited as two complementary dominant genes. Ninety-two doubled haploid (DH) lines from a cross between the Australian cv. Teal (Pst susceptible) and AvR were used for DArT-Seq genotypic analysis to map the seedling resistance. Marker-trait association analysis using 9035 DArT-Seq loci mapped the genes to the long arms of chromosomes 3D (3DL) and 5B (5BL), respectively. F2 populations from crosses between susceptible DH lines that carried either the 3DL or 5BL marker genotypes confirmed the complementary gene model. Fluorescence in situ hybridization (FISH) analysis determined that Teal carries a reciprocal T5B-7B translocation. FISH analysis also identified a 5BL chromosomal deletion in Avocet S relative to AvR that further validated the complementary gene model and possibly explained the heterogeneity of closely related wheats carrying the YrA resistance. The individual loci of the complementary YrA resistance were designated Yr73 (3DL) and Yr74 (5BL). Candidate single gene reference stocks will be permanently accessioned following cytological analysis to avoid the T5B-7B translocation.

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Section: Introductionmentioning

confidence: 72%

Complementary resistance genes in wheat selection ‘Avocet R’ confer resistance to stripe rust

et al. 2015

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“…Such information is very useful in efficient incorporation of different genes into variety for a long lasting resistance. The level of resistance was enhanced when uneffective genes were incorporating in one genotype (Schafer et al, 1963;Baker, 1966;Dyck et al, 1966;Simons et al, 1978;Kolmer, 1992, Sawhney, 1992, and Sawhny et al 1992. Complementary gene action is commonly used to describe the interdependence of two or more genes or their products, all of which are essential for the ultimate expression of a character (Hooker, 1967).…”

Section: Discussionmentioning

confidence: 99%

Inheritance of Resistance to Leaf Rust in 13 Wheat Near-Isogenic Lines

Youssef¹,

Hermas²,

Hamada

2007

Journal of Plant Production

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The inheritance of seedling and adult plant resistance against race no 49 of P. triticina and more virulent race mixture, was studied under greenhouse and field conditions sequentially. The monogenic line Lr34 was crossed with each of Lr,s : B, 11, 12, 13, 17, 24, 31 and 35.The line Lr10 was crossed with either of Lr9, 23 and 24. Finally the line Lr35 was crossed with each of Lr31 and 38. At seedling stage, the cross Lr34 + Lr24 was segregated in F2 as ratio 9(R): 7(S), while at adult stage no segregation was observed and the resistance was dominant. Lr35 + Lr38 at seedling and adult stage F2 segregated to 9 (R): 7(S). On the other hand Lr9 + Lr10 at seedling stage F2 segregated to 7(R): 9(S), but at adult stage appeared no segregated and dominance of resistance. Likewise Lr10 + Lr23 at seedling stage F2 segregated to 1(R): 15(S), while adult stage segregated to 13(R): 3(S). The cross Lr34 + Lr35 at seedling stage F2 showed no segregation, the dominance was in the side of susceptibility, while adult stage segregated to 13(R) : 3(S). The rest crosses of adult stage appeared segregated and dominance tend to the side of susceptibility, but at seedling stage all crosses showed no segregation and dominance tend to the side of susceptibility. This investigation confirmed on studying the genetics of resistance at adult stage that have expression rather than seedling stage.

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“…Resistance expression may be triggered as a consequence of the interaction of both a threshold level of host‐reaction gene products and pathogenicity gene products. Gene dosage effects may explain some reports of rust resistance in small grain cereals attributed to complementary gene action (Baker, 1966; Singh and McIntosh, 1984) as well as avirulent strains of P. recondita from selfing experiments carried out on a susceptible wheat line (Statler, 1979). Worland et al.…”

Section: Discussionmentioning

confidence: 99%

Dosage Effect of Lr3 Gene in the Triticum aestivum–Puccinia recondita Specific Interaction

Sacco¹,

Suarez

Saione³

et al. 2001

Journal of Phytopathology

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Gene dosage effects of Lr3 gene were studied in the Triticum aestivum–Puccinia recondita tritici specific interaction. Deletion‐duplication lines carrying different doses of Lr3 gene in chromosome 6B were obtained from a cross between standard Sinvalocho MA wheat and an isogenic translocated Sinvalocho MA 1BS/6BS‐1BL/6BL line. Cytogenetic analysis and assessment of pathogen development revealed evidence for Lr3 gene dosage dependence in the expression of both resistance and avirulence. Increasing doses of chromosome 6B, from nullisomic to tetrasomic condition, increased the resistance, reaching the maximum at the tetrasomic level. The role of reciprocal translocations in the evolution of disease resistance genes in hexaploid wheat, the duplication of genes for resistance as a strategy to be used in plant breeding and the implications of gene‐dosage dependence in host–parasite associations are discussed.

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Isolation of complementary genes conditioning crown rust resistance in the oat variety Bond

Cited by 20 publications

References 3 publications

Complementary resistance genes in wheat selection ‘Avocet R’ confer resistance to stripe rust

Complementary resistance genes in wheat selection ‘Avocet R’ confer resistance to stripe rust

Inheritance of Resistance to Leaf Rust in 13 Wheat Near-Isogenic Lines

Dosage Effect of Lr3 Gene in the Triticum aestivum–Puccinia recondita Specific Interaction

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