Abstract
Leaf rust on wheat caused by Puccinia triticina Eriks. is a disease widespread in all parts of the world where wheat is a main cereal crop. The race, pathotype and genetic variability of the pathogen’s population in Bulgaria were investigated. The virulence of the pathogen population was studied on Thatcher near isogenic lines with genes Lr1, Lr2a, Lr2b, Lr2c, Lr3, Lr9, Lr11, Lr15, Lr17, Lr19, Lr21, Lr23, Lr24, Lr26 and Lr28. A total of 221 isolates were analyzed. Seventy-one phenotypically different pathotypes were identified. Pathotypes 63562, 63573 and 63762 had the highest frequency of occurrence. For the first time in this population 25 entirely new pathotypes were identified. The genetic variability was represented by 86 genetic formulae for virulence. The most common combination was 1, 9, 15, 19, 24, 28 / 2а, 2b, 2с, 3, 11, 17, 21, 23, 26 (37.9%). The genes for resistance demonstrated variable efficiency. During this period the immunity was conferred by the following genes: Lr22а, Lr22b and Lr43. Genes Lr1, Lr3ka, Lr9, Lr19, Lr25, Lr28, Lr40, Lr41, Lr42, Lr45, Lr47 and Lr50 demonstrated very good to high efficiency. During the investigated period, pathotypes were found which were overcoming the resistance of the two strong genes Lr9 and Lr19.
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Claims 8
Claim · model-written summary
Among 221 isolates, 71 phenotypically different pathotypes of Puccinia triticina were identified in Bulgaria.
- Taxon
- wheat
Triticum aestivume0 - Interactor
- Puccinia triticina
Puccinia triticinae0pathogen - Outcome
- phenotypically different pathotypese1
- Value
- Seventy-onee1
- Setting
- Bulgariat1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e1“Seventy-one phenotypically different pathotypes were identified”
t1“in Bulgaria”
Claim · model-written summary
Pathotypes 63562, 63573 and 63762 had the highest frequency of occurrence of Puccinia triticina on wheat.
- Taxon
- wheatTriticum aestivume0
- Material
- Pathotypes 63562, 63573 and 63762e2
- Interactor
- Puccinia triticinaPuccinia triticinae0pathogen
- Outcome
- highest frequency of occurrencee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e2“Pathotypes 63562, 63573 and 63762 had the highest frequency of occurrence”
Claim · model-written summary
For the first time in this population, 25 entirely new pathotypes of Puccinia triticina were identified.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Puccinia triticinaPuccinia triticinae0pathogen
- Outcome
- entirely new pathotypese3
- Value
- 25e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e3“25 entirely new pathotypes were identified”
Claim · model-written summary
The genetic variability of the pathogen population was represented by 86 genetic formulae for virulence.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Puccinia triticinaPuccinia triticinae0pathogen
- Outcome
- genetic formulae for virulencee4
- Value
- 86e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e4“The genetic variability was represented by 86 genetic formulae for virulence”
Claim · model-written summary
The most common virulence formula of Puccinia triticina was found in 37.9% of isolates.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Puccinia triticinaPuccinia triticinae0pathogen
- Outcome
- most common combinatione5
- Value
- 37.9%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e5“The most common combination was 1, 9, 15, 19, 24, 28 / 2а, 2b, 2с, 3, 11, 17, 21, 23, 26 (37.9%)”
Claim · model-written summary
Lr22a, Lr22b and Lr43 conferred immunity during the investigated period.
- Taxon
- wheatTriticum aestivume0
- Gene
- Lr22be6
- Outcome
- immunitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e6“the immunity was conferred by the following genes: Lr22а, Lr22b and Lr43”
Claim · model-written summary
Lr1, Lr3ka, Lr9, Lr19, Lr25, Lr28, Lr40, Lr41, Lr42, Lr45, Lr47 and Lr50 showed very good to high efficiency.
- Taxon
- wheatTriticum aestivume0
- Outcome
- efficiencye7
- Value
- very good to highe7
- Qualifier
- Lr1, Lr3ka, Lr9, Lr19, Lr25, Lr28, Lr40, Lr41, Lr42, Lr45, Lr47 and Lr50e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e7“Genes Lr1, Lr3ka, Lr9, Lr19, Lr25, Lr28, Lr40, Lr41, Lr42, Lr45, Lr47 and Lr50 demonstrated very good to high efficiency”
Claim · model-written summary
Some Puccinia triticina pathotypes overcame the resistance conferred by the strong genes Lr9 and Lr19.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Puccinia triticinaPuccinia triticinae0pathogen
- Gene
- Lr9 and Lr19e1
- Outcome
- resistancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf rust on wheat caused by Puccinia triticina Eriks.”
e1“pathotypes were found which were overcoming the resistance of the two strong genes Lr9 and Lr19”