scholarly journals Powdery mildew resistance genes in barley varieties grown in Australia

2012 ◽  
Vol 63 (10) ◽  
pp. 997 ◽  
Author(s):  
Antonín Dreiseitl ◽  
Gregory Platz
Keyword(s):  
Hordeum Vulgare ◽  
Powdery Mildew ◽  
Resistance Genes ◽  
Powdery Mildew Resistance ◽  
Specific Resistance ◽  
Recessive Gene ◽  
Hordeum Vulgare L ◽  
Breeding Programs ◽  
Breeding Lines ◽  
New Varieties

Barley (Hordeum vulgare L.) is a major crop in Australia and powdery mildew (Blumeria graminis f. sp. hordei) is one of its most common diseases. Genes for resistance to powdery mildew were postulated for 86 Australian barley varieties and nine advanced breeding lines using 40 reference isolates of the pathogen. Fifty isolates collected in Australia in 2011 were used for additional tests of some varieties. In total, 22 known resistance genes [mlo, Mla1, MlaAl2, Mla3, Mla6, Mla7, Mla8, Mla9, Mla12, Mla13, Mlat, Mlg, MlGa, Mlk1, MlLa, Mlra, Ml(Ab), Ml(Ch), Ml(Dr2), Ml(He2), Ml(Lo) and Ml(St)] were detected. The most frequent genes were Mla8 and Mlg present in 43 and 34 varieties, respectively, while MlGa was found in 12 varieties. Each of the specific resistance genes Mla1, Mla3, Mla6, Mla9, Mla13, Ml(St) and the non-specific recessive gene mlo was found in one variety only. The varieties Maritime and Stirling appear to carry no specific resistance genes. Fifteen unknown resistances were detected. It is recommended that Australian barley breeding programs exploit European varieties possessing mlo to improve the resistance to powdery mildew in new varieties.

scholarly journals Selections from barley landrace collected in Libya as new sources of effective resistance to powdery mildew (Blumeria graminis f.sp. hordei)

2011 ◽  
Vol 48 (No. 5) ◽  
pp. 217-223 ◽  
Author(s):  
J.H. Czembor ◽  
H.J. Czembor
Keyword(s):  
Powdery Mildew ◽  
Powdery Mildew Resistance ◽  
Agricultural Research ◽  
Genetic Resistance ◽  
Recessive Gene ◽  
Blumeria Graminis ◽  
Hordeum Vulgare L ◽  
Mildew Resistance ◽  
Barley Landrace ◽  
Barley Powdery Mildew

Powdery mildew on barley (Hordeum vulgare L.) caused by the pathogen Blumeria graminis f.sp. hordei occurs worldwide and can result in severe yield loss. Because agronomical methods to control the disease are not completely effective, cultivars with genetic resistance are needed. Therefore, there is a need to describe new sources of genes that confer resistance to barley powdery mildew. This study was conducted to determine the genetic basis of resistance to powdery mildew in three selections 995-1-1, 995-1-2, 995-1-3 from barley landrace 995 (ICB 112840) collected in Al Aziziyah district, Tripolitania, Libya. Landrace originated from InternationalCenter for Agricultural Research in the Dry Areas – ICARDA, Aleppo, Syria. To determine the number of genes, the types of genes action and the gene loci in tested lines two types of crosses were made: (1) the lines were crossed to the susceptible cultivar Pallas, (2) the lines were crossed with Pallas isoline P22 carrying gene mlo5. The parents and progeny F2 were evaluated with isolate R303.1 for the powdery mildew resistance. Based on segregation ratios we found that resistance in these three selections was determined by a single recessive gene allelic to the Mlo locus occurring in Pallas isoline P22. In addition tested lines showed resistance reaction type 0(4) characteristic only for genes mlo. The value of new identified sources of highly effective powdery mildew resistance to breeding programs and barley production is discussed.

scholarly journals A novel way to identify specific powdery mildew resistance genes in hybrid barley cultivars

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Antonín Dreiseitl
Keyword(s):  
Powdery Mildew ◽  
Resistance Genes ◽  
Powdery Mildew Resistance ◽  
Specific Resistance ◽  
Genetic Resistance ◽  
Limiting Factor ◽  
Response Type ◽  
Barley Cultivars ◽  
Dominant Genes ◽  
Cereal Disease

Abstract Powdery mildew, a common cereal disease caused by the fungus Blumeria graminis, is a major limiting factor of barley production and genetic resistance is the most appropriate protection against it. To aid the breeding of new cultivars and their marketing, resistance genes can be postulated in homogeneous accessions. Although hybrid cultivars (F1) should be homogeneous, they are often not genetically uniform, especially if more than two genotypes are involved in their seed production or due to undesirable self-pollination, out-crossing and mechanical admixtures. To overcome these problems the accepted method of postulating specific resistance genes based on comparing response type arrays (RTAs) of genetically homogeneous cultivars with RTAs of standard genotypes was substituted by analysing the frequency of response types to clusters of pathogen isolates in segregating F2 generations. This method combines a genetic and phytopathological approach for identifying resistance genes. To assess its applicability six hybrid cultivars were screened and from three to seven with a total of 14 resistance genes were found. Two genes were newly located at the Mla locus and their heritability determined. In addition, three unknown dominant genes were detected. This novel, comprehensive and efficient method to identifying resistance genes in hybrid cultivars can also be applied in other cereals and crops.

AC Vision barley

2002 ◽  
Vol 82 (3) ◽  
pp. 551-553 ◽  
Author(s):  
K. M. Ho ◽  
T. M. Choo ◽  
R. A. Martin ◽  
C. D. Caldwell ◽  
D. Walker ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Powdery Mildew ◽  
Key Words ◽  
Powdery Mildew Resistance ◽  
High Yield ◽  
Research Centre ◽  
Hordeum Vulgare L ◽  
Eastern Canada ◽  
Mildew Resistance ◽  
Barley Breeding

AC Vision is a six-rowed spring feed barley (Hordeum vulgare L.) cultivar bred at the Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, and evaluated by the Eastern Canada Barley Breeding Group. It was selected from a Sabina/OAC Kippen cross. It has high yield, improved straw strength and resistance to powdery mildew. AC Vision is suitable for growing in areas II and IV of Ontario and in the Maritime Region of Canada. Key words: Hordeum vulgare L., feed barley, high yield, powdery mildew resistance

scholarly journals Polymorphism of wild species of р. Malus MILL. according to powdery mildew resistance genes

2021 ◽  
Vol 59 (1) ◽  
pp. 62-70
Author(s):  
A. S. Lyzhin ◽  
N. N. Savel’eva
Keyword(s):  
Powdery Mildew ◽  
Resistance Genes ◽  
Wild Species ◽  
Target Genes ◽  
Powdery Mildew Resistance ◽  
Scar Marker ◽  
Molecular Genetic ◽  
Geographic Origin ◽  
Breeding Programs ◽  
Mildew Resistance

Powdery mildew (Podosphaera leucotricha (Ell. E tEv.) Salm.) – is one of the most widespread apple diseases in world. Identification of forms, carrying resistance genes, is an important stage in breeding programs aimed at obtaining powdery mildew resistant apple varieties. Diagnostic DNA markers of target genes will increase reliability of identification and efficiency of apple breeding for the creation of resistant genotypes. The purpose of this study was molecular genetic testing of wild species of genus Malus Mill. According to Pl-1, Pl-w and Pl-d powdery mildew resistance genes for revealing polymorphism of the studied loci and identification of valuable genotypes for breeding. The study subjects were the wild species of genus Malus Mill. of different ecological and geographic origin. The Pl-1 gene was identified using AT20-SCAR marker, Pl-w gene - EM M02 marker, Pl-d gene - EM DM01 marker. AT20-SCAR marker (Pl-1 gene) was identified in 37.3 % of genotypes. EM M02 marker (Pl-w gene) was detected in 16.4 % of the studied forms. EM DM01 marker (Pl-d gene) is present in 10.4 % of the analyzed forms. At least one of the studied molecular markers is present in the genome of 52.2 % of apple wild species. The Pl-1 gene in apple wild species is most spread in Baccatae series, the Pl-w gene - in Baccatae and Sieboldinae series, the Pl-d gene - in Orientalis series. Wild species M. baccata 2319, M. mandshurica 41947, M. sachalinensis 85, M. sachalinensis 97, M. purpurea v. pendula 2396 are characterized by combination of Pl-1 and Pl-w genes; M. turkmenorum 13283 and M. turkmenorum 29 421 - Pl-1 and Pl-d genes; M. denticulata 29416 - Pl-w and Pl-d genes, which allows to recommend them as promising complex sources of high powdery mildew resistance for breeding.

Exploring the Serbian GenBank barley (Hordeum vulgare L. subsp. vulgare) collection for powdery mildew resistance

2015 ◽  
Vol 63 (2) ◽  
pp. 275-287 ◽  
Author(s):  
Gordana Šurlan-Momirović ◽  
Kerstin Flath ◽  
Cristina Silvar ◽  
Gordana Branković ◽  
Doris Kopahnke ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Powdery Mildew ◽  
Powdery Mildew Resistance ◽  
Hordeum Vulgare L ◽  
Mildew Resistance

RODEO BARLEY

1984 ◽  
Vol 64 (1) ◽  
pp. 203-205 ◽  
Author(s):  
K. W. CAMPBELL ◽  
R. I. BRAWN ◽  
K. M. HO
Keyword(s):  
Hordeum Vulgare ◽  
Powdery Mildew ◽  
Doubled Haploid ◽  
Powdery Mildew Resistance ◽  
High Yield ◽  
Hordeum Vulgare L ◽  
Eastern Canada ◽  
Lodging Resistance ◽  
Cultivar Description ◽  
Breeder Seed

Rodeo is a two-rowed spring feed barley (Hordeum vulgare L.) developed by the Bulbosum doubled haploid method. It has high yield, high test weight, large kernels, good lodging resistance and is resistant to powdery mildew. It is adapted to Eastern Canada. Breeder seed of Rodeo is maintained by Ciba-Geigy Seeds, Ailsa Craig, Ontario.Key words: Hordeum vulgare L., powdery mildew resistance, strong straw, Bulbosum, doubled haploid, cultivar description

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