Aflatoxin contamination of groundnut in Niger
1993
Waliyar, F. | Hassan, H.
During the 1989, 1990 and 1991 rainy seasons, 25 lines including germplasm, advanced A. flavus resistant breeding lines, and cultivars from West Africa, were tested at Sadore, Bengou and Maradi in Niger. Seed collected from these trials was tested in the laboratory to estimate contamination by A. flavus, and aflatoxin content was measured using the ELISA method. Average seed contamination varied from 5 to 37 % according to site and year. The highest seed contamination was recorded in 1991 at Sadore. Significant differences between genotypes were found. Some breeding line possessed good levels of resistance to A. flavus, reflecting the presence of genes for resistance. A. flavus contamination was well correlated and aflatoxin content ranged from 1 to 750 ppb. Only one line (VAR 27) with high contamination by A. flavus showed a low level of aflatoxin. Among the ICRISAT breeding lines, ICGV 87110 produced the lowest level of aflatoxin. In 1991, VAR 27 had 49 % seed invasion by A. flavus only had 1 ppb of aflatoxin
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