Screening for resistance to Aspergillus flavus and aflatoxin production in groundnut

Abstract

All the varieties, advanced breeding lines, germplasm lines, and wild species used in the experiments differed significantly for their ability to allow invasion and aflatoxin production by an aflatoxigenicAspergillus flavus strain. Infection and colonisation were strongly correlated (r = 0.82), while there was no relation between infection and aflatoxin content or colonisation and aflatoxin content (r = 0.15). The varieties ICGS11 and S 206 supported less infection and colonisation (range 35 to 40%). Lowest aflatoxin content was recorded in Chitra (3,200 ppb), while it was highest in Kaushal (38,250 ppb). A cross derivative of GAUG1 × NC Ac 17133 R F showed lowest infection and colonisation (86,3 and 25,28%, respectively), and also supported moderate aflatoxin production (4,000 ppb). Among germplasm lines spancross supported lowest aflatoxin production (2,026 ppb) while both the wild species vz. ICG 8127 and ICG 8128 were highly susceptible to infection, colonisation, and aflatoxin production.

Molecular characterisation of <italic>Aspergillus flavus</italic> isolates from peanut fields in India using AFLP

“…, 2011 ). Since, not all the isolates of Aspergillus are toxigenic ( Desai et al , 1991 ), the characterisation of the isolates, for their toxigenicity in the major agro-ecological zones of peanut production system in India, is the need of the hour.…”

“…, 2004 ). Till date, limited information, from India, is available on the prevalence and variability across the isolates of Aspergillus belonging to the section Flavi in respect to their toxigenicity ( Desai et al. , 1991 ; Rajarajan et al.…”

Detection of Toxigenic and Atoxigenic Strains of Aspergillus flavus in Telangana and Andhra Pradesh

“…These aflatoxins are a group of twenty secondary metabolites produced by Aspergillus flavus 16 and Aspergillus parasiticus (Speare) 17,24 . In several of the documented cases, there was no direct correlation between the quantum of A. flavus infection and kernel aflatoxin contamination 5 . One of the important factors for lack of correlation is the presence of nonaflatoxigenic/atoxigenic A. flavus strains in groundnut crop soils and their invasion to pods.…”

Prevalence of Aspergillus flavus Infection and Aflatoxin Contamination of Groundnut in Telangana and Andhra Pradesh

“…However, a comprehensive mapping of the risk and sensitive areas with respect to toxin accumulation during storage at oil mills/traders' is not documented. Further, in several of the documented cases, there was no direct correlation between the quantum of A. flavus infection and kernel aflatoxin contamination 4 . The present investigation was carried out with the facilities available at International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Hyderabad, India.…”

“…The crop occupies about 25. 4 Mha worldwide with an annual production of 45.2 Mt and a productivity of 1.77 tonnes ha -1 [6] . In India, the crop is grown to an extent of 5.25 Mha with a production of 9.47 Mt and productivity of 1.80 tonnes ha -1 [6] .…”