Abstract
Twenty barley (Hordeum vulgare L.) landraces from Greece were tested for resistance to powdery mildew (Erysiphe graminis f. sp. hordei). Landraces originated from a collection of Polish Gene Bank, IHAR Radzików, Poland. Thirteen landraces (65%) expressed resistance reactions and from those 37 single-plant lines were selected. These lines were tested at the seedling stage with 23 differential isolates of powdery mildew. The isolates were chosen according to their virulence spectra as observed on the 'Pallas' isoline differential set and on 8 additional differential cultivars. Fiveteen lines originating from five landraces (4917, 4919, 4926, 4928 and 4935) expressed resistance to all isolates used. In 31 tested lines it was impossible to determine which specific allele or alleles for resistance are present. However, expression of infection types 0, 1 and 2 for the isolates tested indicated that 26 from these lines may have several alleles for resistance. Three different resistance alleles (Mlat and Mla6+ Mla14) were postulated to be present in the lines either alone or in combination with other unidentified genes. Allele Mlat was postulated to be present in 4 and alleles Mla6 + Mla14 were postulated to be present in 2 of the tested lines. The value of landraces for diversification of powdery mildew resistance genes available to barley breeders was discussed.;
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Claims 8
Claim · model-written summary
Thirteen barley landraces, 65%, expressed resistance reactions.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Material
- landracese0
- Interactor
- Erysiphe graminis f. sp. hordeiBlumeria hordeit1pathogen
- Outcome
- resistance reactionse0
- Value
- 65%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Thirteen landraces (65%) expressed resistance reactions and from those 37 single-plant lines were selected.”
t0“barley”
t1“powdery mildew (Erysiphe graminis f. sp. hordei)”
Claim · model-written summary
Thirty-seven single-plant lines were selected from resistant barley landraces.
- Taxon
- barleyHordeum vulgaret0
- Material
- single-plant linese0
- Outcome
- selectede0
- Value
- 37 single-plant linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thirteen landraces (65%) expressed resistance reactions and from those 37 single-plant lines were selected.”
t0“barley”
Claim · model-written summary
Fifteen lines from five landraces resisted every tested isolate.
- Taxon
- barleyHordeum vulgaret0
- Material
- linese0
- Interactor
- Erysiphe graminis f. sp. hordeiBlumeria hordeit1pathogen
- Outcome
- resistance to all isolates usede0
- Value
- five landracese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fiveteen lines originating from five landraces (4917, 4919, 4926, 4928 and 4935) expressed resistance to all isolates used.”
t0“barley”
t1“powdery mildew (Erysiphe graminis f. sp. hordei)”
Claim · model-written summary
Resistance alleles could not be determined in 31 tested lines.
- Taxon
- barleyHordeum vulgaret0
- Material
- tested linese0
- Outcome
- impossible to determine which specific allele or alleles for resistance are presente0
- Value
- 31 tested linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 31 tested lines it was impossible to determine which specific allele or alleles for resistance are present.”
t0“barley”
Claim · model-written summary
Infection types suggested that 26 lines may carry several resistance alleles.
- Taxon
- barleyHordeum vulgaret0
- Material
- linese0
- Outcome
- may have several alleles for resistancee0
- Value
- 26e0
- Qualifier
- infection types 0, 1 and 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“expression of infection types 0, 1 and 2 for the isolates tested indicated that 26 from these lines may have several alleles for resistance.”
t0“barley”
Claim · model-written summary
Three resistance alleles were postulated in the lines, alone or with unidentified genes.
- Taxon
- barleyHordeum vulgaret0
- Gene
- Mlate0
- Outcome
- postulated to be presente0
- Value
- Three different resistance allelese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three different resistance alleles (Mlat and Mla6+ Mla14) were postulated to be present in the lines either alone or in combination with other unidentified genes.”
t0“barley”
Claim · model-written summary
Mlat was postulated in four lines.
- Taxon
- barleyHordeum vulgaret0
- Gene
- Mlate0
- Outcome
- postulated to be presente0
- Value
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Allele Mlat was postulated to be present in 4 and alleles Mla6 + Mla14 were postulated to be present in 2 of the tested lines.”
t0“barley”
Claim · model-written summary
Mla6 and Mla14 were postulated in two lines.
- Taxon
- barleyHordeum vulgaret0
- Gene
- Mla6 + Mla14e0
- Outcome
- postulated to be presente0
- Value
- 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Allele Mlat was postulated to be present in 4 and alleles Mla6 + Mla14 were postulated to be present in 2 of the tested lines.”
t0“barley”