Abstract
The spread and development of sunflower rust in the regions of the Russian Federation is due to the emergence of new biotypes of the pathogen, which have overcome the resistance of cultivated varieties and hybrids. The aim of the research was to identify isolates of the sunflower rust pathogen collected in 2020-2022 in 8 regions of crop cultivation according to the internationally accepted classification: Krasnodar, Volgograd, Saratov, Voronezh, Ulyanovsk, Penza, Orenburg, and Tambov regions of the Russian Federation. Differential lines of sunflower rust resistance (CM 90, CM 29, R-386, HAR-1, HAR-2, HAR-3, HAR-4, HAR-5) and the variety VNIIMK 8833 susceptible to all races of the pathogen were used for testing. A total of 280 isolates of urediniospores of the parasite collected from infected plants of different sunflower genotypes were identified according to the internationally accepted classification. In this sample, 27 biotypes of rust pathogens were differentiated. There have been identified fifteen biotypes not previously found in Russia, their code numbers are 320, 701, 703, 710, 720, 721, 730, 742, 744, 747, 761, 765, 766, 771 and 777. The most virulent biotype 777 was detected in 2022 among isolates from the Volgograd region. The biotype with the code number 700 was detected in all the regions presented, accounting for 50 % of the sample of isolates studied. It is advisable to carry out sunflower breeding for its resistance.
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Claims 5
Claim · model-written summary
Twenty-seven rust biotypes were differentiated among 280 isolates from sunflower in the regions of the Russian Federation.
- Taxon
- sunflower
Helianthus annuuse0 - Interactor
- rust pathogense2pathogen
- Outcome
- biotypese2
- Value
- 27e2
- Setting
- regions of the Russian Federatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spread and development of sunflower rust in the regions of the Russian Federation is due to the emergence of new biotypes of the pathogen”
e2“In this sample, 27 biotypes of rust pathogens were differentiated”
Claim · model-written summary
Fifteen rust biotypes were found in Russia for the first time.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- biotypes not previously found in Russiae3
- Value
- fifteene3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spread and development of sunflower rust in the regions of the Russian Federation is due to the emergence of new biotypes of the pathogen”
e3“There have been identified fifteen biotypes not previously found in Russia, their code numbers are 320, 701, 703, 710, 720, 721, 730, 742, 744, 747, 761, 765, 766, 771 and 777”
Claim · model-written summary
Biotype 777 was the most virulent and was detected in 2022 in the Volgograd region.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- biotype 777e4
- Direction
- most virulente4
- Setting
- Volgograd regione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spread and development of sunflower rust in the regions of the Russian Federation is due to the emergence of new biotypes of the pathogen”
e4“The most virulent biotype 777 was detected in 2022 among isolates from the Volgograd region”
Claim · model-written summary
Biotype 700 accounted for 50% of the isolates studied and was found in all regions presented.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- biotype with the code number 700e5
- Value
- 50 %e5
- Qualifier
- of the sample of isolates studiede5
- Setting
- all the regions presentede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spread and development of sunflower rust in the regions of the Russian Federation is due to the emergence of new biotypes of the pathogen”
e5“The biotype with the code number 700 was detected in all the regions presented, accounting for 50 % of the sample of isolates studied”
Claim · model-written summary
Sunflower breeding for resistance to the rust is advisable.
- Taxon
- sunflowerHelianthus annuuse6
- Outcome
- breeding for its resistancee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“It is advisable to carry out sunflower breeding for its resistance”