Abstract
Fusarium oxysporum f. sp. vasinfectum (FOV) Atk. Sny & Hans is a continuing threat to cotton production in the United States that warrants attention in plant breeding programs. Several developments concerning this pathogen (e.g. newly-recognized Australian FOV races and identification of FOV race 4 in California) highlight the need for additional research to provide improved host plant resistance to this pathogen. In order to assess the U.S. cotton gene pool and to study host plant resistance to FOV race 4, field and greenhouse evaluations were conducted in 2003, 2004, and 2005 on more than 150 Pima (Gossypium barbadense L.) and Acala and non-Acala Upland (G. hirsutum L.) entries. A population of 32 Pima recombinant inbred lines (RILs) and six F1 combinations of hybrids developed between susceptible and resistant entries were also evaluated. Pima cottons inoculated with race 4 developed more severe symptoms than the Acala and non-Acala Upland cottons, but some Acala and Upland cottons were severely infected. Germplasm with high levels of resistant to FOV race 4 was identified in some Pima entries. Resistance against FOV race 4 in Pima cottons was more complete than expected and may be determined by a single dominant major gene and one or more modifying minor genes, which may explain the trangressive segregation observed in some RILs. FOV resistance in Acala and non-Acala Upland cottons may be more complex and may be inherited in a quantitative manner by several major genes and minor modifying genes. This research identified new, improved resistant germplasm for release in the future for public incorporation into California cotton cultivars. In addition, this research provided information about the susceptibility of commercial cotton and improved germplasm that will allow growers to make informed decisions regarding which cotton cultivar to plant in fields infested with race 4. Development of highly resistant germplasm and genetic mapping of populations to develop and/or identify molecular markers to assist in breeding for FOV resistance in cotton are continuing.
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Claims 7
Claim · model-written summary
Inoculated Pima cotton developed more severe symptoms than Upland cotton.
- Taxon
- cottons
Gossypium hirsutume0 - Material
- Pimae0
- Treatment
- inoculated with race 4e0
- Interactor
- race 4e0pathogen
- Outcome
- symptomse0
- Direction
- more severee0
- Comparator
- Acala and non-Acala Upland cottonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pima cottons inoculated with race 4 developed more severe symptoms than the Acala and non-Acala Upland cottons”
Claim · model-written summary
Some Acala and Upland cottons were severely infected.
- Taxon
- cottonsGossypium hirsutume0
- Material
- Acala and Uplande0
- Outcome
- severely infectede0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some Acala and Upland cottons were severely infected”
Claim · model-written summary
Some Pima entries had high resistance to Fusarium wilt race 4.
Not reportedTaxon
Verbatim
e0“Germplasm with high levels of resistant to FOV race 4 was identified in some Pima entries”
t0“Cotton”
Claim · model-written summary
Pima resistance was more complete than expected.
- Taxon
- cottonsGossypium hirsutume0
- Material
- Pimae0
- Interactor
- FOV race 4e0pathogen
- Outcome
- Resistance against FOV race 4e0
- Direction
- more completee0
- Comparator
- expectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance against FOV race 4 in Pima cottons was more complete than expected”
Claim · model-written summary
Pima resistance may involve a dominant major gene and modifying minor genes.
Not reportedTaxon
Verbatim
e0“Resistance against FOV race 4 in Pima cottons was more complete than expected and may be determined by a single dominant major gene and one or more modifying minor genes”
t0“Cotton”
Claim · model-written summary
Upland FOV resistance may be quantitatively inherited through multiple genes.
- Taxon
- cottonsGossypium hirsutume0
- Material
- Acala and non-Acala Uplande0
- Gene
- several major genes and minor modifying genese0
- Outcome
- FOV resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FOV resistance in Acala and non-Acala Upland cottons may be more complex and may be inherited in a quantitative manner by several major genes and minor modifying genes”
Claim · model-written summary
New resistant germplasm was identified for future release.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- new, improved resistant germplasme0
- Qualifier
- for release in the futuree0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This research identified new, improved resistant germplasm for release in the future for public incorporation into California cotton cultivars”
The same questions in other papers
inoculation · disease · Gossypium hirsutum (cotton)Positive and negative results
23 papers in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- positive
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See all 42 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.