Virulence of Puccinia recondita f. sp. tritici in the United States in 1987

Long, Don M.; Schafer, J. F.; Roelfs, A. P.; Roberts, J. J.

doi:10.1094/pd-73-0294

Cited by 21 publications

(22 citation statements)

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“…Parlevliet (1975) by counting the number of visible pustules on market leaves daily until no more pustules appeared. From these data, time between inoculation and 50% of the pustules just visible was estimated C Leaf rust severity (%) according to Long et al (1992) Biochemical changes associated with induced resistance: This study was conducted to identify some biochemical changes associated with induced resistance by some microelements and fungicide. Activity of oxidative enzymes, i.e., peroxidase (POD), polyphenoloxidase (PPO), as well as total phenols content were determined in wheat leaves of treated and untreated plants.…”

Section: Methodsmentioning

confidence: 99%

“…Effect of different microelements and fungicide on disease parameters: Leaf rust severity (%) according to Long et al (1992), disease parameters were expressed by five types; immune = (0), resistance = (R), Moderately Resistance (MR), Moderately Susceptible = (MS) and Susceptible = (S) as described by Roelfs et al (1992).…”

Section: Determination Of Oxidative Enzymes Activitymentioning

confidence: 99%

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Inducing Resistance against Leaf Rust Disease of Wheat by some Microelements and Tilt Fungicide

Tohamey¹,

Ebrahim²

2015

Plant Pathology J.

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Section: Methodsmentioning

confidence: 99%

Section: Determination Of Oxidative Enzymes Activitymentioning

confidence: 99%

Inducing Resistance against Leaf Rust Disease of Wheat by some Microelements and Tilt Fungicide

Tohamey¹,

Ebrahim²

2015

Plant Pathology J.

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“…Twelve differentials consisting of 6 to 8 plants of each near-isogenic Lr line in a Thatcher background (6) were used in determining the virulence phenotype (Prt code) along with near-isogenic lines with Lr10, Lr18, and Lr19. Each virulence phenotype data set for each uredinial isolate was determined on 90 to 120 plants.…”

Section: Methodsmentioning

confidence: 99%

“…tritici Eriks, is one of the most important wheat diseases worldwide. Certain wheat-producing countries (1,4,6,15) have conducted leaf rust monitoring programs to monitor physiologic specialization of this pathogen. Physiologic specialization of P. recondita was first reported by Mains and Jackson (8,9).…”

mentioning

confidence: 99%

Physiologic Specialization of Puccinia recondita f. sp. tritici in Nebraska During 1995 and 1996

Watkins

Rutledge²,

Baenziger³

et al. 1998

Plant Disease

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Field samples of Puccinia recondita f. sp. tritici, collected from four wheat-growing regions in Nebraska in 1995 and from three in 1996, were characterized for virulence. Twenty virulence phenotypes were identified in 1995 and 18 in 1996. Virulence phenotypes MBR-10,18 (virulent on Lr genes, 1, 3, 3ka, 10, 11, 18, and 30) and MDR-10,18 (virulent on Lr genes 1, 3, 3ka, 10, 11, 18, 24, and 30) were the most prevalent, with each phenotype comprising 21.6% of the isolates characterized in 1995. Of the 1995 isolates, 24% were virulent on 10 or more host genes. No virulence to Lr16 and Lr17 was detected. In 1996, virulence phenotype MBR-10,18 was the most prevalent and comprised 20.5% of the isolates characterized. Of the 1996 isolates, 33% were virulent on 10 or more host genes. All isolates in both years were virulent on Lr1, Lr3, and Lr10. New virulence phenotypes were detected in 1996 that were not detected in 1995. In 1996, virulence was more frequent on Lr2a, Lr16, and Lr17 and less frequent on Lr3ka, Lr18, Lr24, Lr26, and Lr30. The number of isolates virulent on Lr24 and Lr26 has decreased from 83 and 53%, respectively, in 1992, to 34 and 1%, respectively, in 1996.

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“…The combinations of the genes Lr16 and Lr13 (Samborski and Dyk 1982) or Lr9 and Lr24 (Long et al 1994) were reported to provide reliable control against leaf rust. The lines with the pairs of genes Lr13 and Lr34, Lr13 and Lr37, Lr34 and Lr37 provided a higher level of resistance than lines with individual genes (Kloppers and Pretorius 1997).…”

mentioning

confidence: 99%

Development of wheat genotypes possessing a combination of leaf rust resistance genes Lr19 and Lr24

Šliková¹,

Gregová²,

Bartoš³

et al. 2004

PLANT SOIL ENVIRON

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Endopeptidase allele Ep-D1c and DNA marker-assisted selection have been used for the incorporation of Lr19 + Lr24 leaf rust resistance genes combination into adapted commercial winter wheat cultivars. The first step was the transfer of the gene Lr19 from the donor cultivar Agrus into acceptor cultivars Simona and Lívia. The progenies possessing the null allele Ep-D1c linked to the gene Lr19 have been screened for their resistance to leaf rust by isolate 4332 SaBa. The plants homozygous properties at the Ep-D1c locus and resistant against leaf rust were used for crossing with NIL Thatcher/Lr24 -a donor of the gene Lr24. Plants possessing both Lr genes were selected from F 2 population by STS and isozyme markers linked to the Lr genes. Progenies of 18 F 2 plants have been selected by STS marker and tested for resistance against leaf rust. Results obtained with isozyme and STS markers corresponded with resistance testing. Altogether 6 progenies of F 3 generation possessing a resistance gene combination of Lr19 + Lr24 in a homozygous condition were developed.

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Virulence of Puccinia recondita f. sp. tritici in the United States in 1987

Cited by 21 publications

References 0 publications

Inducing Resistance against Leaf Rust Disease of Wheat by some Microelements and Tilt Fungicide

Inducing Resistance against Leaf Rust Disease of Wheat by some Microelements and Tilt Fungicide

Physiologic Specialization of Puccinia recondita f. sp. tritici in Nebraska During 1995 and 1996

Development of wheat genotypes possessing a combination of leaf rust resistance genes Lr19 and Lr24

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