Developing Resistance to Aflatoxin in Maize and Cottonseed

Toxins

Jeffrey W. Cary¹  Kanniah Rajasekaran¹  Robert L. Brown¹  Meng Luo¹  Zhi-Yuan Chen² 

[1] United States Department of Agriculture-Agriculture Research Service, Southern Regional Research Center, New Orleans, LA 70124, USA;Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA;

关键词: Aspergillus flavus;    aflatoxin resistance;    host resistance;    marker-assisted breeding;    transgenic cotton;    maize;   

DOI  :  10.3390/toxins3060678

来源: mdpi

【 摘 要 】

At this time, no “magic bullet” for solving the aflatoxin contamination problem in maize and cottonseed has been identified, so several strategies must be utilized simultaneously to ensure a healthy crop, free of aflatoxins. The most widely explored strategy for the control of aflatoxin contamination is the development of preharvest host resistance. This is because A. flavus infects and produces aflatoxins in susceptible crops prior to harvest. In maize production, the host resistance strategy has gained prominence because of advances in the identification of natural resistance traits. However, native resistance in maize to aflatoxin contamination is polygenic and complex and, therefore, markers need to be identified to facilitate the transfer of resistance traits into agronomically viable genetic backgrounds while limiting the transfer of undesirable traits. Unlike maize, there are no known cotton varieties that demonstrate enhanced resistance to A. flavus infection and aflatoxin contamination. For this reason, transgenic approaches are being undertaken in cotton that utilize genes encoding antifungal/anti-aflatoxin factors from maize and other sources to counter fungal infection and toxin production. This review will present information on preharvest control strategies that utilize both breeding and native resistance identification approaches in maize as well as transgenic approaches in cotton.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.