Abstract
Seedling resistance, adult plant resistance and resistant stability of 43 leaf rust resistance genes of wheat (Lr1-Lr43) worldwide nominated so far were tested in 1997-1999 using 294 Chinese isolates of Puccinia recondita f.sp.tritici and major dominant races which previously characterized for avirulence/virulence gene combination, respectively. Eight Lr genes Lr9, Lr19, Lr24, Lr25,Lr28, Lr29, Lr38, Lr42 of the 43 test genes (or gene combination) expressed high resistance to Puccinia triticina in China at both seedling and adult plant stages. Among them the infection types produced by the host parasite interactions did not affected with the temperature change in the range of 5-30℃ except of Lr29 which displayed temperature sensitive (high temperature susceptible). Lr12, Lr13 and Lr23 displayed typical adult plant resistance (APR) e.g. resistance (immune to very resistance) to Puccinia triticina at the adult plant stage but susceptible at the seedling stage, and Lr34, Lr35 showed obvious slow rusting resistance e.g. moderately susceptible at both seedling and adult plant stages but low final disease infectioun rating (less than 10%).Lr3ka, Lr16, Lr17, Lr18, Lr39, Lr40, Lr41, Lr43 had highly final disease infectiou rating (more than 40%) but moderately resistant or medium infection types at adult plant stage. Among them, Lr39, Lr40, Lr41 had effective resistance at the seedling stage with the frequencies of avirulence genes at more than 85%. Those genes above mentioned could be considered as effective resistance genes to Chinese P.triticina population and used in wheat improvement program in China. The rest genes expressed ineffective to Chinese P.triticina population neither at seedling stage nor adult plant stage and no any utilizable value in wheat breeding. Stability of leaf rust resistance was tested in 43 wheat lines with specific Lr genes using BBB, DHS, PGT and PHT P.triticina pathotypes under 5/10℃, 15/20℃ and 25/30℃ temperature ranges, respectively. The results indicated that 25 genes of 43 tested genes displayed stable or basically stable infection type, high temperature resistance was detected in 4 genes and low temperature resistance in 3 genes, and the interactions of parasite (pathogen pathotype), host (wheat lines) and environment (temperature) (PHE) were detected in the other 11 genes. It has been also found that resistance expression of some Lr genes was different in wheat with different genetic background.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
Lr9, Lr19, Lr24, Lr25, Lr28, Lr29, Lr38 and Lr42 expressed high resistance to Puccinia triticina in China at seedling and adult plant stages.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- seedling and adult plant stagese1
- Interactor
- Puccinia triticina
Puccinia triticinae1pathogen - Gene
- Lr9, Lr19, Lr24, Lr25,Lr28, Lr29, Lr38, Lr42e1
- Outcome
- high resistancee1
- Setting
- Chinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e1“Eight Lr genes Lr9, Lr19, Lr24, Lr25,Lr28, Lr29, Lr38, Lr42 of the 43 test genes (or gene combination) expressed high resistance to Puccinia triticina in China at both seedling and adult plant stages”
Claim · model-written summary
Lr12, Lr13 and Lr23 displayed adult plant resistance to Puccinia triticina but were susceptible at the seedling stage.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- adult plant stagee2
- Interactor
- Puccinia triticinaPuccinia triticinae2pathogen
- Gene
- Lr12, Lr13 and Lr23e2
- Outcome
- adult plant resistance (APR)e2
- Qualifier
- susceptible at the seedling stagee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e2“Lr12, Lr13 and Lr23 displayed typical adult plant resistance (APR) e.g. resistance (immune to very resistance) to Puccinia triticina at the adult plant stage but susceptible at the seedling stage”
Claim · model-written summary
Lr34 and Lr35 showed slow rusting resistance, with a low final disease infection rating of less than 10%.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- seedling and adult plant stagese3
- Gene
- Lr34, Lr35e3
- Outcome
- slow rusting resistancee3
- Value
- less than 10%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e3“Lr34, Lr35 showed obvious slow rusting resistance e.g. moderately susceptible at both seedling and adult plant stages but low final disease infectioun rating (less than 10%)”
Claim · model-written summary
Lr3ka, Lr16, Lr17, Lr18, Lr39, Lr40, Lr41 and Lr43 had a high final disease infection rating (more than 40%) at the adult plant stage.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- adult plant stagee4
- Gene
- Lr3ka, Lr16, Lr17, Lr18, Lr39, Lr40, Lr41, Lr43e4
- Outcome
- final disease infectiou ratinge4
- Value
- more than 40%e4
- Qualifier
- moderately resistant or medium infection typese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e4“Lr3ka, Lr16, Lr17, Lr18, Lr39, Lr40, Lr41, Lr43 had highly final disease infectiou rating (more than 40%) but moderately resistant or medium infection types at adult plant stage”
Claim · model-written summary
Lr39, Lr40 and Lr41 had effective seedling-stage resistance, with avirulence gene frequencies of more than 85%.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- seedling stagee5
- Gene
- Lr39, Lr40, Lr41e5
- Outcome
- effective resistancee5
- Value
- more than 85%e5
- Qualifier
- frequencies of avirulence genese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e5“Lr39, Lr40, Lr41 had effective resistance at the seedling stage with the frequencies of avirulence genes at more than 85%”
Claim · model-written summary
The genes Lr39, Lr40 and Lr41 could be considered effective resistance genes and used in the wheat improvement program in China.
- Taxon
- wheatTriticum aestivume6
- Interactor
- P.triticinaPuccinia triticinae6pathogen
- Outcome
- used in wheat improvement programe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Those genes above mentioned could be considered as effective resistance genes to Chinese P.triticina population and used in wheat improvement program in China”
Claim · model-written summary
The remaining Lr genes were ineffective against the Chinese P.triticina population at both seedling and adult plant stages and had no utilizable value in wheat breeding.
- Taxon
- wheatTriticum aestivume7
- Interactor
- P.triticinaPuccinia triticinae7pathogen
- Outcome
- expressed ineffectivee7
- Qualifier
- no any utilizable value in wheat breedinge7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The rest genes expressed ineffective to Chinese P.triticina population neither at seedling stage nor adult plant stage and no any utilizable value in wheat breeding”
Claim · model-written summary
Of 43 tested Lr genes, 25 displayed stable or basically stable infection type across pathotypes and temperature ranges.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- stable or basically stable infection typee1
- Value
- 25 genes of 43 tested genese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e1“The results indicated that 25 genes of 43 tested genes displayed stable or basically stable infection type”
Claim · model-written summary
High temperature resistance was detected in 4 Lr genes.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- high temperature resistancee2
- Value
- 4 genese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e2“high temperature resistance was detected in 4 genes”
Claim · model-written summary
Low temperature resistance was detected in 3 Lr genes.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- low temperature resistancee2
- Value
- 3 genese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e2“low temperature resistance in 3 genes”
Claim · model-written summary
Interactions among pathogen pathotype, wheat line and temperature (PHE) were detected for the other 11 Lr genes.
- Taxon
- WheatTriticum aestivumt0
- Interactor
- pathogen pathotypee1pathogen
- Outcome
- interactions of parasite (pathogen pathotype), host (wheat lines) and environment (temperature) (PHE)e1
- Value
- 11 genese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e1“the interactions of parasite (pathogen pathotype), host (wheat lines) and environment (temperature) (PHE) were detected in the other 11 genes”
Claim · model-written summary
Infection types of the host-parasite interactions were not affected by temperature changes in the range of 5-30℃, except for Lr29.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- infection typese1
- Qualifier
- temperature change in the range of 5-30℃e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e1“the infection types produced by the host parasite interactions did not affected with the temperature change in the range of 5-30℃ except of Lr29”
Claim · model-written summary
Lr29 displayed temperature sensitivity, with high temperature susceptibility.
- Taxon
- WheatTriticum aestivumt0
- Gene
- Lr29e2
- Outcome
- temperature sensitivee2
- Qualifier
- high temperature susceptiblee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Rust Resistance of Wheat in China”
e2“Lr29 which displayed temperature sensitive (high temperature susceptible)”
Claim · model-written summary
Resistance expression of some Lr genes differed among wheat with different genetic backgrounds.
- Taxon
- wheatTriticum aestivume1
- Material
- different genetic backgrounde1
- Gene
- Lr genese1
- Outcome
- resistance expressione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“resistance expression of some Lr genes was different in wheat with different genetic background”