Aflatoxin production in peanut lines selected to represent a range of linoleic acid concentrations

Xue, H.Q. and Isleib, T.A. and Payne, G.A. and Novitzky, W.F. and OBrian, G. (2005) Aflatoxin production in peanut lines selected to represent a range of linoleic acid concentrations. Journal of Food Protection, 68 (1). pp. 126-132.

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To determine whether concentrations of linoleate in groundnut (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°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

Item Type: Article
Additional Information: SNNigam collections
Author Affiliation: Department of Crop Science, Box 7629, North Carolina State University, Raleigh, NC 27695, USA.
Subjects: Plant Protection
Postharvest Management > Food Technology
Plant Physiology and Biochemistry > Biochemistry
Divisions: Groundnut
Depositing User: Mr T L Gautham
Date Deposited: 08 Aug 2013 11:16
Last Modified: 08 Aug 2013 11:16

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