Identification of Powdery Mildew Resistance Genes in Cultivars of Soft Red Winter Wheat

Leath, S.; Heun, M.

doi:10.1094/pd-74-0747

Cited by 66 publications

(45 citation statements)

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“…Records of the disease were denoted after disease on set using the (0-9) scale adopted by Leath and Heun (1990). Disease symptoms were measured at heading stage.…”

Section: Experimental Designmentioning

confidence: 99%

Genetic Diversity and Relationships Among Some Barley Genotypes for Net Blotch Disease Resistance Using Rapd, Scot and SSR Markers

Dora¹,

Mansour²,

Aboulila³

et al. 2018

Egyptian Journal of Genetics and Cytology

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“…Records of the disease were denoted after disease on set using the (0-9) scale adopted by Leath and Heun (1990). Disease symptoms were measured at heading stage.…”

Section: Experimental Designmentioning

confidence: 99%

Genetic Diversity and Relationships Among Some Barley Genotypes for Net Blotch Disease Resistance Using Rapd, Scot and SSR Markers

Dora¹,

Mansour²,

Aboulila³

et al. 2018

Egyptian Journal of Genetics and Cytology

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“…The inoculum source originated from field grown plants infected with the fungus collected from different locations and multiplied on Morocco plants under controlled green house at Gemmeiza Research Station, Gharbya Governorate in 2013 and 2014 growing seasons. Disease response was recorded 8 days after inoculation according the scale used by Leath and Heun (1990). In this scale; 0 = immune, 1 -3 = resistant reaction, 4 -6 = intermediate reaction, 7 -9 susceptible reaction.…”

Section: Disease Assessmentsmentioning

confidence: 99%

Identification of Pm24, Pm35 and Pm37 in thirteen Egyptian bread wheat cultivars using SSR markers

Emara

Omar

El-Shamy³

et al. 2016

Ciênc. agrotec.

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Powdery mildew of wheat (Triticum spp.) caused by Blumeria graminis f.sp. tritici (DC) E.O. Speer Em. Marchal is one of the most important bread wheat diseases in Egypt. All the Egyptian common bread wheat cultivars are susceptible to that disease at seedling and adult stages. Breeding of resistant cultivars is the most economical and environmentally safe method to eliminate the disease and reduce crop losses. Combinations of two or more effective resistance genes may lead to better, more durable resistance to that disease. Eight Pm genes i.e. Pm2, Pm6, Pm12, Pm16, Pm24, Pm35, Pm36 and Pm37 out of 21 powdery mildew monogenic wheat lines (Pm) were resistant to 42 individual isolates of powdery mildew collected from different governorates in the Nile Delta area, Egypt, at seedling and adult stages. Only four DNA specific SSR markers (Xgwm337, Xcfd7 linked to Pm24, Pm35 and Xgwm332, Xwmc790) linked to Pm37 resistance genes were selected to detect these genes in 13 Egyptian common bread wheat cultivars. This study reveals the absence of Pm24, Pm35 and Pm37 in all the 13 Egyptian bread wheat cultivars. These results gave evidence that the Egyptian cultivars are not having resistance genes and need to further incorporate one, two or more resistant genes in a single genotype as all commercial cultivars defeated by the pathogen.

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“…Infection types (ITs) of seedlings in each line were rated using a 0-4 scale, where 0 represented no visible symptoms, 0 n represented necrotic flecks, and 1-4 stood for highly resistant, resistant, susceptible, and highly susceptible, respectively [Liu et al, 2005]. Adult reactions were rated according to a 0-9 scale in which 0 was immune (no visible symptoms) and 9 was highly susceptible (heavy sporulation) [Leath and Heun 1990].…”

Section: Reactions To Powdery Mildew and Stripe Rustmentioning

confidence: 99%

Molecular Cytogenetic Characterization of a New Wheat-<i>Thinopyrum intermedium </i>Partial Amphiploid Resistant to Powdery Mildew and Stripe Rust

Bao

Li²,

Liu³

et al. 2009

Cytogenet Genome Res

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A partial amphiploid, TE253, derived from crosses between the common wheat (Triticum aestivum L.) cultivar Yannong 15 and Thinopyrum intermedium (Host) Barkworth & D.R. Dewey was characterized by cytogenetic observations, disease resistance tests and genomic in situ hybridization (GISH). Mitotic observations showed that most plants of TE253 had 56 chromosomes, but a few had 54 or 55 chromosomes. The chromosomes in most pollen mother cells of plants with 2n = 56 formed 28 bivalents. Univalents (0.89 per cell) and tetravalents (0.087 per cell) occasionally occurred at meiotic metaphase I, showing a high degree of cytogenetic stability. After inoculation with the powdery mildew and stripe rust pathogens, Yannong 15 was highly susceptible, whereas TE253 and Th. intermedium were immune to both diseases. This indicated that the resistance of TE253 to powdery mildew and stripe rust was derived from Th. intermedium. GISH analysis using St-genomic DNA from Pseudoroegneria strigosa (M. Bieb) Á. Löve as a probe and ABD-genomic DNA from Chinese Spring wheat as a blocker demonstrated that TE253 consisted of 2 St-genome chromosomes, 8 J^S-genome chromosomes, 2 SAT J chromosomes and 2 J-St translocated chromosomes. Line TE253 is a new partial amphiploid with resistance to both powdery mildew and stripe rust and can be used as a source of resistance genes in wheat improvement.

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Identification of Powdery Mildew Resistance Genes in Cultivars of Soft Red Winter Wheat

Cited by 66 publications

References 0 publications

Genetic Diversity and Relationships Among Some Barley Genotypes for Net Blotch Disease Resistance Using Rapd, Scot and SSR Markers

Genetic Diversity and Relationships Among Some Barley Genotypes for Net Blotch Disease Resistance Using Rapd, Scot and SSR Markers

Identification of Pm24, Pm35 and Pm37 in thirteen Egyptian bread wheat cultivars using SSR markers

Molecular Cytogenetic Characterization of a New Wheat-<i>Thinopyrum intermedium </i>Partial Amphiploid Resistant to Powdery Mildew and Stripe Rust

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