Authors: Jiahuai Hu Darcy E P Telenko Patrick M Phipps Elizabeth A Grabau
Publish Date: 2015/12/16
Volume: 145, Issue: 1, Pages: 177-187
Abstract
Field trials were conducted from 2006 to 2008 at the Tidewater Agricultural Research and Extension Center TAREC in Suffolk Virginia to determine whether Blight Blocker transgenic peanut lines showed possible increased or decreased susceptibility to common peanut pathogens Disease susceptibility was evaluated for seven transgenic lines containing a barley oxalate oxidase gene and their corresponding parental cultivars Perry Wilson NC 7 In addition to Sclerotinia blight the peanut diseases evaluated included i early leaf spot caused by Cercospora arachidicola ii Cylindrocladium black rot caused by Cylindrocladium parasiticum iii southern stem rot caused by Sclerotium rolfsii iv tomato spotted wilt virus and v aflatoxin levels in seeds caused by Aspergillus flavus or A parasiticus Results demonstrated that the susceptibility of Blight Blocker transgenic lines to common peanut pathogens was similar to that of nontransgenic cultivars while transgenic lines provided resistance to Sclerotinia blight caused by S minor Transgenic lines consistently provided high levels of resistance to S minor in all three years however the barley oxalate oxidase had little or no effect on the disease susceptibility to other organisms on peanut The results of this research should provide additional evidence needed to petition for deregulation of Blight Blocker peanut linesThis work was supported by the USDA National Institute of Food and Agriculture Hatch project 221820 Funding was provided by the National Peanut Board Virginia Peanut Growers’ Association Virginia Agricultural Council and United States Department of Agriculture Southern Region IPM Program We thank B Keeling S Byrum E Hobbs and J Hampton for technical assistance in the laboratory and field
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