Abstract
The sunflower (Helianthus annuus L.) is one of the most important crops grown for edible oil. Sclerotinia sclerotiorum (Lib.) de Bary is a common and widespread pathogen of sunflower. In the present study the reaction of 35 genotypes, including recombinant inbred lines and their parents, M7 mutant lines developed by gamma irradiation, and some genotypes from different geographical origins, were evaluated against eight S. sclerotiorum isolates in controlled conditions. The proportion of the subsequent basal stem lesions was measured 3 days after inoculation. Highly significant differences were observed among sunflower genotypes and S. sclerotiorum isolates, with the isolates interacting differentially with sunflower genotypes. Two genotypes had high partial resistance to all S. sclerotiorum isolates, whereas others were susceptible to all isolates. Isolates of S. sclerotiorum differed in virulence to host genotypes. Some genotypes showed specific interactions with S. sclerotiorum isolates, being resistant to some isolates but susceptible to others. Recombinant inbred lines used in this study showed different reactions to eight isolates of S. sclerotiorum when compared with their parental lines. The isolate-specific and isolate-nonspecific partial resistant genotypes identified in present experiments should be used in crossing programmes for breeding of durable resistance to Sclerotinia basal stem disease.
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Claims 7
Claim · model-written summary
Sunflower genotypes differed significantly in basal stem lesions.
- Taxon
- sunflower
Helianthus annuuse0 - Material
- sunflower genotypese0
- Interactor
- S. sclerotiorum
Sclerotinia sclerotiorume0pathogen - Outcome
- differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highly significant differences were observed among sunflower genotypes and S. sclerotiorum isolates, with the isolates interacting differentially with sunflower genotypes.”
Claim · model-written summary
Sclerotinia isolates differed significantly in virulence among sunflower genotypes.
- Taxon
- sunflowerHelianthus annuust0
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume0pathogen
- Outcome
- virulence to host genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isolates of S. sclerotiorum differed in virulence to host genotypes.”
t0“sunflower”
Claim · model-written summary
Two sunflower genotypes had high partial resistance to all isolates.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Two genotypese0
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume0pathogen
- Outcome
- high partial resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two genotypes had high partial resistance to all S. sclerotiorum isolates, whereas others were susceptible to all isolates.”
t0“sunflower”
Claim · model-written summary
Other genotypes were susceptible to all isolates.
- Taxon
- sunflowerHelianthus annuust0
- Material
- otherse0
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume0pathogen
- Outcome
- susceptible to all isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two genotypes had high partial resistance to all S. sclerotiorum isolates, whereas others were susceptible to all isolates.”
t0“sunflower”
Claim · model-written summary
Some genotypes resisted some isolates but were susceptible to others.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Some genotypese0
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume0pathogen
- Outcome
- resistant to some isolates but susceptible to otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some genotypes showed specific interactions with S. sclerotiorum isolates, being resistant to some isolates but susceptible to others.”
t0“sunflower”
Claim · model-written summary
Recombinant inbred lines reacted differently from their parents to eight isolates.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Recombinant inbred linese0
- Interactor
- S. sclerotiorumSclerotinia sclerotiorume0pathogen
- Outcome
- different reactionse0
- Comparator
- their parental linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recombinant inbred lines used in this study showed different reactions to eight isolates of S. sclerotiorum when compared with their parental lines.”
t0“sunflower”
Claim · model-written summary
The authors recommend resistant genotypes for crossing to breed durable resistance.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- used in crossing programmes for breeding of durable resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolate-specific and isolate-nonspecific partial resistant genotypes identified in present experiments should be used in crossing programmes for breeding of durable resistance to Sclerotinia basal stem disease.”
t0“sunflower”