Resistance to Leaf Rust, Stripe Rust, and Stem Rust in Aegilops spp. in Israel

In all, 1,323 single plant accessions of Aegilops bicornis, A. kotschyi, A. longissima, A. ovata, A. searsii, A. sharonensis, A. speltoides, and A. variabilis collected from 18 regions in Israel and 2 adjacent regions in Lebanon and Egypt were evaluated for leaf rust (Puccinia triticina) and stripe rust (P. striiformis) resistance in field plots and for seedling resistance to leaf rust and stem rust (P. graminis f. sp. tritici) in greenhouse tests. Nearly all accessions of A. speltoides were highly resistant to leaf rust, stripe rust, and stem rust. A. longissima and A. ovata were highly resistant to stripe rust, whereas A. bicornis and A. kotschyi were highly susceptible. A. searsii was highly susceptible to stem rust, but 24 to 51% of accessions of A. bicornis, A. longissima, A. ovata, and A. variabilis were resistant to stem rust. Except for A. ovata and A. speltoides, more than 95% of the Aegilops accessions were susceptible to leaf rust caused by P. recondita alternating on Anchusa spp. Only Aegilops ovata was susceptible to P. recondita from Echium spp. A. bicornis, A. koschyi, and A. searsii were highly susceptible as seedlings to common wheat leaf rust caused by P. triticina. Most accessions of A. variabilis and about half of the accessions of A. longissima had good seedling resistance to P. triticina. Few accessions of A. ovata showed seedling resistance to the P. triticina population in Israel, but 30% were resistant to U.S. isolates. In field tests, A. bicornis showed high susceptibility to common wheat leaf rust, but more than 90% of the accessions of the other Aegilops spp. developed little or no leaf rust on adult plants. The Aegilops spp. in Israel and adjoining countries provide a rich and varied source of rust resistance for wheat breeding.

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Occurrence of wheat leaf rust (Puccinia triticina) races and virulence changes in Slovakia in 1994–2004

Biologia ◽

10.2478/s11756-008-0044-9 ◽

2008 ◽

Vol 63 (2) ◽

Cited By ~ 11

Author(s):

Alena Hanzalová ◽

Jozef Huszár ◽

Pavel Bartoš ◽

Eva Herzová

Keyword(s):

Leaf Rust ◽

Resistance Genes ◽

Field Tests ◽

Puccinia Triticina ◽

Near Isogenic Lines ◽

Wheat Leaf Rust ◽

Good Resistance ◽

Isogenic Lines ◽

Wheat Leaf

AbstractIn 1995–2004 we investigated leaf rust virulence in Slovakia on Thatcher near isogenic lines (NILs) with genes Lr1, Lr2a, Lr2b, Lr2c, Lr3a, Lr9, Lr10, Lr11, Lr15, Lr17, Lr19, Lr21, Lr23, Lr24, Lr26 and Lr28. According to reaction of leaf rust isolates resistance genes Lr9 and Lr19 were completely effective to all examined pathotypes in all years. The resistance genes Lr24 and Lr28 were also completely effective to all examined pathotypes till the year 2001. In the year 2001 we detected 20% and 10% virulent isolates on NILs Lr24 and Lr28, respectively. According to the reaction of investigated isolates from the territory of Slovakia on NILs, resistance genes Lr2c, Lr3a, Lr11, Lr17, Lr21, Lr23 and Lr26 were mostly ineffective.During the 1994–2004 period we detected 16 races of leaf rust (races 2, 2SaBa, 6, 6SaBa, 12, 12SaBa, 14, 14SaBa, 57, 57SaBa, 61, 61SaBa, 62SaBa, 77, 77SaBa, 77/57SaBa). The most frequently determined races were 61SaBa and 77SaBa, which occurred in all years. Among frequently determined races we can assign race 12SaBa as well.According to the field tests in 2001–2004 good resistance to leaf rust was displayed by the cvs Arida (Lr13, Lru), Eva (Lr3, Lru) and Solara (Lru).

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RUST REACTIONS OF CHINESE WHEAT VARIETIES AND CERTAIN CANADIAN HYBRID STRAINS

Canadian Journal of Research ◽

10.1139/cjr42c-011 ◽

1942 ◽

Vol 20c (2) ◽

pp. 108-115 ◽

Cited By ~ 1

Author(s):

Yun-Chang Wang

Keyword(s):

North America ◽

Leaf Rust ◽

Stripe Rust ◽

Stem Rust ◽

Field Tests ◽

Puccinia Triticina ◽

Seedling Stage ◽

Wheat Varieties ◽

Triticum Vulgare ◽

Physiologic Races

About 160 Chinese spring wheats and a number of Chinese winter wheats were tested in the seedling stage in the greenhouse to determine their reaction to eight physiologic races of stem rust (Puccinia graminis Tritici) and to four physiologic races of leaf rust (Puccinia triticina). The spring wheats were also subjected, in the field, to epidemics of stem rust and leaf rust in which a large number of physiologic races of each rust were employed. The wheats were classified as one or another of the following species: Triticum vulgare, T. compactum, T. durum, and T. turgidum.By means of these tests, it has been demonstrated that the Chinese wheats are rather highly susceptible to the physiologic races of stem rust prevalent in North America. Many of the wheats showed, however, considerable resistance to leaf rust in both the greenhouse and the field tests. Varieties resistant to leaf rust were present in all of the four above-mentioned species.Seventy-five lines of Canadian spring wheat derived from a cross between Renown Selection, which is resistant to stem rust and moderately resistant to leaf rust, and Garnet, which in North America is resistant to stripe rust (Puccinia glumarum), were tested in the seedling stage in the greenhouse for their reaction to stripe rust. Two physiologic races (race 6 and race 13) were used in these tests. The same lines were subjected to rust epidemics in the field to determine their resistance to stem rust and leaf rust. Several of these lines were found to possess resistance to all three rusts. These lines may prove valuable breeding material in case it is desired to develop by breeding methods Chinese varieties resistant to all three of these rusts.

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Genetically Divergent Types of the Wheat Leaf Fungus Puccinia triticina in Ethiopia, a Center of Tetraploid Wheat Diversity

Phytopathology ◽

10.1094/phyto-10-15-0247-r ◽

2016 ◽

Vol 106 (4) ◽

pp. 380-385 ◽

Cited By ~ 10

Author(s):

J. A. Kolmer ◽

M. A. Acevedo

Keyword(s):

Leaf Rust ◽

Common Wheat ◽

Hexaploid Wheat ◽

Rust Fungus ◽

Tetraploid Wheat ◽

Low Frequency ◽

Puccinia Triticina ◽

Leaf Rust Resistance ◽

Virulence Phenotype ◽

Wheat Leaf

Collections of Puccinia triticina, the wheat leaf rust fungus, were obtained from tetraploid and hexaploid wheat in the central highlands of Ethiopia, and a smaller number from Kenya, from 2011 to 2013, in order to determine the genetic diversity of this wheat pathogen in a center of host diversity. Single-uredinial isolates were derived and tested for virulence phenotype to 20 lines of Thatcher wheat that differ for single leaf rust resistance genes and for molecular genotypes with 10 simple sequence repeat (SSR) primers. Nine virulence phenotypes were described among the 193 isolates tested for virulence. Phenotype BBBQJ, found only in Ethiopia, was predominantly collected from tetraploid wheat. Phenotype EEEEE, also found only in Ethiopia, was exclusively collected from tetraploid wheat and was avirulent to the susceptible hexaploid wheat ‘Thatcher’. Phenotypes MBDSS and MCDSS, found in both Ethiopia and Kenya, were predominantly collected from common wheat. Phenotypes CCMSS, CCPSS, and CBMSS were found in Ethiopia from common wheat at low frequency. Phenotypes TCBSS and TCBSQ were found on durum wheat and common wheat in Kenya. Four groups of distinct SSR genotypes were described among the 48 isolates genotyped. Isolates with phenotypes BBBQJ and EEEEE were in two distinct SSR groups, and isolates with phenotypes MBDSS and MCDSS were in a third group. Isolates with CCMSS, CCPSS, CBMSS, TCBSS, and TCBSQ phenotypes were in a fourth SSR genotype group. The diverse host environment of Ethiopia has selected and maintained a genetically divergent population of P. triticina.

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THE INHERITANCE OF RESISTANCE IN RYE TO Puccinia recondita f. sp. secalis and f. sp. tritici

Canadian Journal of Plant Science ◽

10.4141/cjps84-074 ◽

1984 ◽

Vol 64 (3) ◽

pp. 511-519 ◽

Cited By ~ 6

Author(s):

G. L. C. MUSA ◽

P. L. DYCK ◽

D. J. SAMBORSKI

Keyword(s):

Disease Resistance ◽

Leaf Rust ◽

Secale Cereale ◽

Single Gene ◽

Inbred Lines ◽

Puccinia Recondita ◽

Wheat Leaf Rust ◽

Susceptible Parent ◽

Seedling Resistance ◽

Wheat Leaf

The inheritance of seedling resistance to isolate RLR 213/78 of rye leaf rust (Puccinia recondita f. sp. secalis) and race 30 of wheat leaf rust (P. recondita f. sp. tritici Rob.) was investigated in six inbred lines of rye (Secale cereale). Inbred line UM8116 was used as the susceptible parent in crosses. Inbred lines UM8003, UM8071 and UM8301 each have a single gene and UM8336 and UM8340 each have two genes for resistance to rye leaf rust. For resistance to wheat leaf rust UM8071 has a single gene, UM8003 and UM8340 each have two genes and UM8301 and UM8336 each have three genes. UM8295 is heterogeneous for reaction to both rusts. One of the genes in UM8340 may condition resistance to both rusts. The genes for resistance to RLR 213/78 appear to be independently inherited while some of the genes conferring resistance to race 30 may be identical or very closely linked. The potential of rye as a source of disease resistance for wheat and triticale improvement is discussed.Key words: Secale cereale, disease resistance, wheat leaf rust

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Effect of Resistance Inducing Chemicals on Wheat Leaf Rust Caused by Puccinia triticina

Egyptian Journal of Phytopathology ◽

10.21608/ejp.2013.100347 ◽

2013 ◽

Vol 41 (2) ◽

pp. 121-133

Author(s):

Nour El-Din Soliman ◽

Magdy Saber ◽

Alaa Abd-Elaziz ◽

Ibrahim Imbabi

Keyword(s):

Leaf Rust ◽

Puccinia Triticina ◽

Wheat Leaf Rust ◽

Wheat Leaf

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Combined Effects of Streptomyces viridosporus and Trichoderma harzianum on Controlling Wheat Leaf Rust Caused by Puccinia triticina

Plant Pathology Journal ◽

10.3923/ppj.2015.182.188 ◽

2015 ◽

Vol 14 (4) ◽

pp. 182-188 ◽

Cited By ~ 6

Author(s):

H.H.A. El- Sharkawy ◽

Somaya Tohamey ◽

Amal A. Khalil

Keyword(s):

Leaf Rust ◽

Trichoderma Harzianum ◽

Puccinia Triticina ◽

Combined Effects ◽

Wheat Leaf Rust ◽

Streptomyces Viridosporus ◽

Wheat Leaf

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Physiologic Specialization of Puccinia triticina on Wheat in the United States in 2002

Plant Disease ◽

10.1094/pdis.2004.88.10.1079 ◽

2004 ◽

Vol 88 (10) ◽

pp. 1079-1084 ◽

Cited By ~ 20

Author(s):

J. A. Kolmer ◽

D. L. Long ◽

M. E. Hughes

Keyword(s):

United States ◽

Leaf Rust ◽

Great Plains ◽

Puccinia Triticina ◽

The United States ◽

Wheat Leaf Rust ◽

Ohio Valley ◽

Virulence Phenotype ◽

Common Phenotype ◽

Wheat Leaf

Collections of Puccinia triticina were obtained from rust-infected wheat leaves by cooperators throughout the United States and from surveys of wheat fields and nurseries in the Great Plains, Ohio Valley, Southeast, California, and the Pacific Northwest, in order to determine the virulence of the wheat leaf rust fungus in 2002. Single uredinial isolates (785 in total) were derived from the wheat leaf rust collections and tested for virulence phenotype on lines of Thatcher wheat that are near-isogenic for leaf rust resistance genes Lr1, Lr2a, Lr2c, Lr3, Lr9, Lr16, Lr24, Lr26, Lr3ka, Lr11, Lr17, Lr30, LrB, Lr10, Lr14a, and Lr18. In the United States in 2002, 52 virulence phenotypes of P. triticina were found. Virulence phenotype MBDS, which is virulent to resistance gene Lr17, was the most common phenotype in the United States. MBDS was found in the Southeast, Great Plains, and the Ohio Valley regions, and also in California. Phenotype MCDS, virulent to Lr17 and Lr26, was the second most common phenotype and occurred in the same regions as MBDS. Virulence phenotype THBJ, which is virulent to Lr16 and Lr26, was the third most common phenotype, and was found in the southern and northern central Great Plains region. Phenotype TLGJ, with virulence to Lr2a, Lr9, and Lr11, was the fourth most common phenotype and was found primarily in the Southeast and Ohio Valley regions. The Southeast and Ohio Valley regions differed from the Great Plains regions for predominant virulence phenotypes, which indicate that populations of P. triticina in those areas are not closely connected. The northern and southern areas of the Great Plains were similar for frequencies of predominant phenotypes, indicating a strong south to north migration of urediniospores.

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Seedling resistances to rust diseases in international triticale germplasm

Crop and Pasture Science ◽

10.1071/cp10252 ◽

2010 ◽

Vol 61 (12) ◽

pp. 1036 ◽

Cited By ~ 8

Author(s):

J. Zhang ◽

C. R. Wellings ◽

R. A. McIntosh ◽

R. F. Park

Keyword(s):

Leaf Rust ◽

Stripe Rust ◽

Plant Resistance ◽

Stem Rust ◽

Rust Resistance ◽

Adult Plant Resistance ◽

Stem Rust Resistance ◽

Adult Plant ◽

Seedling Resistance ◽

Rust Diseases

Seedling resistances to stem rust, leaf rust and stripe rust were evaluated in the 37th International Triticale Screening Nursery, distributed by the International Wheat and Maize Improvement Centre (CIMMYT) in 2005. In stem rust tests, 12 and 69 of a total of 81 entries were postulated to carry Sr27 and SrSatu, respectively. When compared with previous studies of CIMMYT triticale nurseries distributed from 1980 to 1986 and 1991 to 1993, the results suggest a lack of expansion in the diversity of stem rust resistance. A total of 62 of 64 entries were resistant to five leaf rust pathotypes. In stripe rust tests, ~93% of the lines were postulated to carry Yr9 alone or in combination with other genes. The absence of Lr26 in these entries indicated that Yr9 and Lr26 are not genetically associated in triticale. A high proportion of nursery entries (63%) were postulated to carry an uncharacterised gene, YrJackie. The 13 lines resistant to stripe rust and the 62 entries resistant to leaf rust represent potentially useful sources of seedling resistance in developing new triticale cultivars. Field rust tests are needed to verify if seedling susceptible entries also carry adult plant resistance.

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