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Management of aflatoxin contamination in groundnut by enhancing host-plant resistance

Liao, B., Lei, Y., Jiang, H., Yan, L., Wan, L., Huang, L., Zhou, X., Luo, H., Chen, Y., Wang, H., Pandey, M.K., Sudini, H., Upadhyaya, H.D. and Varshney, R.K.ORCID: 0000-0002-4562-9131 (2017) Management of aflatoxin contamination in groundnut by enhancing host-plant resistance. In: InterDrought-V, 21 - 25 February 2017, Hyderabad, India.


Groundnut (Arachis hypogaea) currently ranks first among oilseed crops in China in terms of annual production, average crop and oil yield, and total crop value. Aflatoxin contamination has been a crucial concern for food safety and market competitiveness in groundnut products in most warm regions where heat and drought stresses are generally serious. Genetic enhancement for resistance to aflatoxin has been regarded as the most cost-effective approach to reduce contamination risk in this crop. Based on continuous evaluation of groundnut germplasms, including the core collections from China, ICRISAT and USA, several lines have been identified as resistant to Aspergillus infection or aflatoxin production. Recently, more research efforts have been made in identifying materials with shell resistance to Aspergillus infection, through cooperation with ICRISAT. Efforts have also been made in identifying and enhancing germplasm lines with diverse resistance components or mechanisms. Several ICRISAT breeding lines have been used in improving aflatoxin resistance of groundnut in Chinese institutions. An elite cultivar developed at OCRI-CAAS, Zhonghua 6, with desirable resistance to aflatoxin production, bacterial wilt and pot rot has been extensively used in central China. Through RNA-seq profiling, it was found that relative higher resveratrol content in Zhonghua 6 was a key mechanism for its reduced aflatoxin production under high infection pressure of Aspergillus sp.

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