Probable Genes for Leaf Rust Resistance in Several Hard Red Spring Wheats<sup>1</sup>

Statler, G. D.

doi:10.2135/cropsci1984.0011183x002400050013x

Cited by 38 publications

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“…If necessary, the symbols '+' or '-' are added to indicate minor differences of infection severity; the letter C was used for cases with significant chlorosis. Postulation of resistance genes was carried out as proposed by Statler (1984): based on the low infection types after gene interaction, the genes resistant to P. graminis f.sp. tritici contained by the tested cultivars were postulated.…”

Section: Methodsmentioning

confidence: 99%

Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China

Li¹,

Wu²,

Xu³

et al. 2016

Plant Prot. Sci.

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Li T.Y., Wu X.X., Xu X.F., Wang W.L., Cao Y.Y. (2016): Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China. Plant Protect. Sci., 52: 242-249.To determine stem rust resistance genes of wheat varieties in Yunnan province, 11 Chinese strains of Puccinia graminis f.sp. tritici with different virulence and 1 artificial mutant strain were used in 110 wheat varieties. The results indicated that among the 45 Sr genes, Sr31, Sr5, SrTmp, Sr30, Sr36, Sr8a, Sr11, Sr24, Sr29, Sr34, Sr9e, Sr26, Sr38, Sr47, and SrTt3 were characterised in 55 wheat varieties singly or in combination. Sr5, Sr31, SrTmp, Sr36, and Sr30 were contained in 17, 16, 5, 5, and 3 cultivars, respectively. Six cultivars contained Sr24 and/or Sr34. Three plant materials likely contained one or more of Sr8a, Sr11, Sr34, and Sr23 genes as well as other unknown genes. The 16 immune or highly resistant varieties contained one or more of Sr9e, Sr26, Sr38, Sr47, SrTt3, and other unknown resistance genes. The reaction types on 22 of the tested cultivars were different from those on Sr genes tested, and their resistance genes could not be analysed. Additionally, 17 varieties were susceptible to all the tested strains, having no postulation value. Our study provides a basis for improved breeding of stem rust resistant wheat in China.

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Section: Methodsmentioning

confidence: 99%

Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China

Li¹,

Wu²,

Xu³

et al. 2016

Plant Prot. Sci.

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“…Five Lr genes (Lr3, Lr9, Lr10, Lr26 and Lr29) each giving 33.33% frequencies within three cultivars. The method was previously reported as a quick method to serve breeding for rust resistance [11,12,[24][25][26][27][28][29][30].…”

Section: Discussionmentioning

confidence: 99%

“…Multipathotypes test of P. triticina isolates on wheat (also called gene postulation) was used to postulate leaf rust resistance genes in Egyptian wheat cultivars according to the method of Browder & Eversmeyer [11] and Statler [12] All plant materials (five grains per entry) were grown in plastic pots (10 cm. diam.).…”

Section: Multipathotypes Testmentioning

confidence: 99%

“…For the validity of the comparison, the completely virulent or avirulent isolates were omitted. Like wise, the completely resistant or susceptible cultivars and monogenic lines were also omitted [11,12]. These data clarified that among 20 Lr genes, thirteen Lr genes, Lr2c, Lr3, Lr9, Lr10, Lr18, Lr19, Lr21, Lr22b, Lr24, Lr26, Lr29, Lr37 and Lr41 probably present within cultivars, Sakha94, Giza168, Gemmiza9, Gemmiza10, Gemmiza11, Sids12, Sids13, Misr1 and Misr2 which may have additional genes as indicated by the symbol (0).…”

Section: Multipathotypes Testmentioning

confidence: 99%

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Identification of Leaf Rust Resistance Genes in Egyptian Wheat Cultivars by Multipathotypes and Molecular Markers

Abou-Elseoud¹

2014

JPS

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A total of twenty leaf rust resistance genes (Lr genes) were postulated in nine Egyptian wheat cultivars based on infection types (ITs) expressed on the tested cultivars by 72 Puccinia triticina pathotypes compared with the ITs expressed on the monogenic lines. The most carrier genes cultivars were Giza168 and Misr1 each may contain five genes i.e. Lr2c,10,18,24, 41 and Lr3,10,19, 22b,24, respectively. Five cultivars, Sakha94, Gemmeiza9, Gemmeiza10, Sids12 and Misr2 each probably contain four genes i.e. Lr9,19,29, 37; Lr18,21,24, 41; Lr3,9,19,29; Lr9,19,26, 29 and Lr3,10,19,26, respectively. Gemmeiza11 was the least cultivar carrying genes; it probably carries just two genes i.e. Lr24 and Lr41. The most postulated genes were Lr19 and Lr24, each postulated within five cultivars followed by Lr41 within four cultivars. Five Lr genes, Lr3, Lr9, Lr10, Lr26 and Lr29 each within three cultivars. The lowest postulated genes were Lr2c, Lr21, Lr22b and Lr37 each of them was postulated within only one cultivar. Five Lr genes, Lr9, Lr10, Lr19, Lr24 and Lr26 were identified by PCR-based molecular marker. The Lr9 gene was identified in cultivar Sids12 while, Lr10 was identified in cultivar Misr1. The Lr19 was present in two cultivars, Misr1 and Misr2. The Lr24 and Lr26 were absent in all the screened Egyptian cultivars. The obtained results for Lr9, Lr10, Lr19, Lr24 and Lr26 marker were in agreement with and confirm their identification by gene postulation. Markers for Lr9, Lr10 and Lr19 may be useful in marker-assisted breeding. Our findings showed the usefulness of the molecular marker in identifying leaf rust resistance genes in wheat cultivars, especially when used in conjunction with multipathotypes test at the pre-breeding stage. This approach may help understanding the wheat -P. triticina interaction and provide information to build an effective management program for leaf rust disease.

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“…Resistances were identifi ed using the postulation method (Brückner, 1964;Statler, 1984;Jensen et al, 1992;and others (Dreiseitl, 2007c). In 2009 and 2010, the resistance tests were conducted on leaf segments as follows.…”

Section: Methodsmentioning

confidence: 99%

Frequency of powdery mildew resistances in winter barley cultivars tested in domestic variety trials

Dreiseitl¹

2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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DREISEITL, A.: Frequency of powdery mildew resistances in winter barley cultivars tested in domestic variety trials.Acta univ. agric. et silvic. Mendel. Brun., 2011, LIX, No. 3, pp. 23-28 In 2006-2010, resistance to the powdery mildew pathogen was studied in 225 winter barley cultivars of which 86 two-rowed and 139 six-rowed. The examined set included 59 cultivars tested in the offi cial variety trials and 166 cultivars in variety trials conducted by domestic breeding stations in that period. Thirteen known resistances were identifi ed (Ar, Bw, Dr2, Ha, HH, IM9, La, Ly, Ra, Ru, Sp, St and We). No resistance was found in one cultivar only. The most frequent resistance was Ra detected in 114 cultivars (= 50.7%). The resistance Bw was found in 54 cultivars (24.0%). Resistances typical for spring barley cultivars (Ly, Sp, Ru and We) were also frequent (4.0% to 23.6%). Unknown resistances were found in 20 cultivars, in nine of which they were eff ective to all used pathotypes of the pathogen. Thirty-six cultivars (16.0%) exhibited heterogeneity in the examined trait, i.e. they were mostly composed of lines with diff erent resistances. Research on cultivars possessing unknown resistances continues.Blumeria graminis f.sp. hordei, Hordeum vulgare, postulation of resistances, powdery mildew, winter barley Winter barley (Hordeum vulgare L.) is a crop that has undergone dramatic changes in the Czech Republic over the last three decades. These changes can be characterised by the six following parameters: 1) growing areas -they were on average of 1971-1977 6,000 ha, then enlarged up to 243,000 ha in 1991 when cv. Borwina was predominating, and in 2006-2010 they were stabilized on average of 124,000 ha; 2) the proportion of registered domestic and foreign cultivars -only foreign cultivars were registered in 1972-1989, then seven domestic cultivars were registered in 1990-1998 and dominated among nine six-rowed cultivars registered in 1998, however, in the following period 45 foreign and only two domestic cultivars were registered; 3) the proportion of grown domestic and foreign cultivars -only foreign cultivars were grown in 1972-1989, then there was a dramatic increase in new domestic cultivars exceeding 75% in each of the years from 1994 to 1999, followed by a rapid fall of domestic cultivars to about 3% in 2008-2010; 4) the proportion of registered six-rowed and two-rowed cultivarsonly six-rowed cultivars had been grown by 1992, in 1993 the fi rst two-rowed cv. Marinka was registered, followed by other 18 foreign cultivars as long as the fi rst domestic two-rowed cv. Florian was registered in 2008; 15 two-rowed and 24 six-rowed cultivars were registered in June 2010; 5) the proportion of grown six-rowed and two-rowed cultivars -growing two-rowed cultivars was not common in the Czech Republic, nevertheless, a er registration of fi rst such cultivars their proportion slowly increased and exceeded 25% in each of the years 2001 to 2004, whereas they were grown on average of 2006-2010 on less then 10%; and fi nally ...

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Probable Genes for Leaf Rust Resistance in Several Hard Red Spring Wheats¹

Cited by 38 publications

References 0 publications

Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China

Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China

Identification of Leaf Rust Resistance Genes in Egyptian Wheat Cultivars by Multipathotypes and Molecular Markers

Frequency of powdery mildew resistances in winter barley cultivars tested in domestic variety trials

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Probable Genes for Leaf Rust Resistance in Several Hard Red Spring Wheats1

Cited by 38 publications

References 0 publications

Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China

Postulation of seedling stem rust resistance genes of Yunnan wheat cultivars in China

Identification of Leaf Rust Resistance Genes in Egyptian Wheat Cultivars by Multipathotypes and Molecular Markers

Frequency of powdery mildew resistances in winter barley cultivars tested in domestic variety trials

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Probable Genes for Leaf Rust Resistance in Several Hard Red Spring Wheats¹