Document Detail

Aflatoxin production in peanut lines selected to represent a range of linoleic acid concentrations.
MedLine Citation:
PMID:  15690813     Owner:  NLM     Status:  MEDLINE    
To determine whether concentrations of linoleate in peanut (Arachis hypogaea L.) seed oil could be used to predict an ability to support aflatoxin production, seeds of genotypes representing a range of linoleate content were inoculated with Aspergillus flavus Link ex Fries and assayed for aflatoxin content. Seeds were blanched and quartered, inoculated with conidia of A. flavus, placed on moistened filter paper in petri dishes, and incubated for 8 days at 28 degrees C. Multiple regression analysis was used to account for the variation among lines with the use of fatty acid concentrations as independent variables. In test 1, linoleate accounted for 39 to 44% of the variation among lines for aflatoxin B1 and B2 and total aflatoxin (26 to 27% after log transformation). Oleate accounted for substantial additional variation (27 to 29%) among lines (20 to 23% after log transformation). Other fatty acids accounted for small fractions of among-line variation. In test 2, linoleate accounted for about 35 to 44% of the variation among entries across traits (29 to 37% for log-transformed data); arachidate accounted for 19 to 29% (27 to 33% after log transformation). Eicosenoate accounted for a small part of the total entry variation. In both experiments, residual variation among entries was significant. Low-linoleate lines consistently contained more aflatoxin, whereas normal- to high-linoleate lines contained variable amounts. Although fatty acid concentrations accounted for significant portions of genetic variation, it is not practical to use them as predictors for susceptibility to aflatoxin contamination, especially for lines in the normal range for oleate and linoleate.
H Q Xue; T G Isleib; G A Payne; W F Novitzky; G OBrian
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of food protection     Volume:  68     ISSN:  0362-028X     ISO Abbreviation:  J. Food Prot.     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-02-04     Completed Date:  2005-03-10     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7703944     Medline TA:  J Food Prot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  126-32     Citation Subset:  IM    
Department of Crop Science, North Carolina State University, Raleigh, North Carolina 27695, USA.
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MeSH Terms
Aflatoxins / analysis,  biosynthesis*
Arachis hypogaea / genetics
Aspergillus flavus / growth & development*,  metabolism*
Consumer Product Safety
Fatty Acids, Unsaturated / analysis,  pharmacology
Food Contamination / analysis
Food Microbiology
Genetic Variation
Linoleic Acid / analysis,  pharmacology*
Plant Oils / chemistry*
Predictive Value of Tests
Regression Analysis
Reg. No./Substance:
0/Aflatoxins; 0/Fatty Acids, Unsaturated; 0/Plant Oils; 2197-37-7/Linoleic Acid; 8002-03-7/arachis oil

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