File(s) under permanent embargo
Relationship of resistance to common scab disease and tolerance to thaxtomin A toxicity within potato cultivars
journal contribution
posted on 2023-05-17, 02:44 authored by Robert TeggRobert Tegg, Calum WilsonCalum WilsonThaxtomin A has a central and implicit role in common scab disease expression in potato. Thaxtomin A tolerance has been suggested as a possible rapid means for screening potato germplasm for disease resistance, during breeding selections. We have tested a range of genetically diverse cultivars with varying resistances to common scab disease in both pot and field based studies and measured their mean necrosis response to thaxtomin A. We found no association between resistance to common scab disease and tolerance to thaxtomin A toxicity. For example, disease resistant cultivars ‘Russet Burbank’ and ‘Atlantic’ were sensitive and tolerant to thaxtomin A toxicity respectively. Similarly; disease susceptible cultivars ‘Bismark’ and ‘Tasman’ showed susceptibility and tolerance to thaxtomin A. This demonstrates that whilst thaxtomin A is critical to disease expression, reaction to this toxin is only one component influencing resistance to common scab disease and many other anatomical, physiological or biochemical factors are critical to defence against this disease.
Funding
Horticulture Innovation Australia
History
Publication title
European Journal of Plant PathologyVolume
128Pagination
143-148ISSN
0929-1873Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Kluwer Academic PublPlace of publication
Van Godewijckstraat 30, Dordrecht, Netherlands, 3311 GzRights statement
The original publication is available at http://www.springerlink.comRepository Status
- Restricted