Abstract
Peanut is among the most important oil crops grown in sub-Saharan Africa for its nutritive value and economic benefit. In this region, Aspergillus flavus infects peanuts and contaminates produce with aflatoxins leading to food insecurity through lowered quality. The impact of aflatoxins transcends the food chain causing harm to human and animal health. The selection and production of aflatoxin-tolerant varieties of peanut is a promising strategy to mitigate their potential harm. We studied the resistance of peanut kernels to aflatoxin accumulation in 25 peanut accessions collected from different growing locations in Kenya, Uganda, and Rwanda based on their unique phenotypic characteristics. To obtain sufficient planting material, the peanut accessions were multiplied separately under standard conditions and harvested at their respective maturity dates then dried and stored at 4 °C before further analysis. At the start of the experiment, the kernels were challenged with a laboratory-characterized toxigenic strain (Aspergillus flavus 1EM1901) and incubated at 28 °C for 7 days. Afterward, the accessions were analysed (ELISA) for aflatoxins. Of the 25 accessions tested, 60 % (n = 15) exhibited kernel resistance to aflatoxin accumulation while 40 % (n = 10) were susceptible (with aflatoxin levels ranging from 0.54 ppb to 1692.92 ppb). Two of the resistant accessions recorded a decrease in aflatoxin accumulation when challenged with toxigenic A. flavus. This differential accumulation of aflatoxins suggests the existence of an inherent trait that can be exploited in breeding programs of peanut varieties with low aflatoxin accumulation when grown in contaminated soils. These findings are further discussed.
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Claims 4
Claim · model-written summary
Fifteen of 25 peanut accessions showed kernel resistance to aflatoxin accumulation after challenge.
- Taxon
- peanut
Arachis hypogaeae1 - Material
- accessionse0
- Outcome
- kernel resistance to aflatoxin accumulatione0
- Value
- 60 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of the 25 accessions tested, 60 % (n = 15) exhibited kernel resistance to aflatoxin accumulation”
e1“peanut accessions were multiplied separately”
Claim · model-written summary
Ten of 25 peanut accessions were susceptible to aflatoxin accumulation, with levels from 0.54 to 1692.92 ppb.
- Taxon
- peanutArachis hypogaeae1
- Material
- accessionse1
- Outcome
- aflatoxin levelse0
- Value
- 0.54 ppb to 1692.92 ppbe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40 % (n = 10) were susceptible (with aflatoxin levels ranging from 0.54 ppb to 1692.92 ppb)”
e1“peanut accessions were multiplied separately”
Claim · model-written summary
Two resistant peanut accessions had decreased aflatoxin accumulation when challenged with toxigenic A. flavus.
- Taxon
- peanutArachis hypogaeae1
- Material
- resistant accessionse0
- Treatment
- challenged with toxigenic A. flavuse0
- Interactor
- A. flavus
Aspergillus flavuse0pathogen - Outcome
- aflatoxin accumulatione0
- Direction
- decreasee0
- Value
- Twoe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two of the resistant accessions recorded a decrease in aflatoxin accumulation when challenged with toxigenic A. flavus”
e1“peanut accessions were multiplied separately”
Claim · model-written summary
The authors suggest differential aflatoxin accumulation can be exploited in breeding low-accumulation peanut varieties.
- Taxon
- peanutArachis hypogaeae0
- Outcome
- breeding programs of peanut varieties with low aflatoxin accumulatione0
- Qualifier
- contaminated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This differential accumulation of aflatoxins suggests the existence of an inherent trait that can be exploited in breeding programs of peanut varieties with low aflatoxin accumulation when grown in contaminated soils”
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2 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
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See all 5 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.