Abstract
The aim of this study was to design a Trichoderma atroviride-specific qPCR oligo set, evaluate its specificity, and standardize a methodology that quantifies antagonism against Botrytis cinerea in blackberry fruits (Rubus adenotrichos Schltdl.). Primers and probe were designed based on the nuclear translation elongation factor 1-alpha (tef1-α) of T. atroviride. A commercial IGS-based oligo set was used to quantify B. cinerea. The specificity of the designed oligo set, along with ITS-based oligo sets, was assessed using other Trichoderma species and B. cinerea. Multiplex qPCR assays were performed using DNA from B. cinerea, T. atroviride, and blackberries inoculated with these fungi. Assays with the tef1-α oligo set showed high sensitivity and reproducibility. In inoculated fruits, T. atroviride and B. cinerea were quantified simultaneously, including in symptomless tissues. This work standardized a qPCR methodology that specifically targets a T. atroviride isolate. This newly-designed qPCR oligo set could be useful in future biological control programs.
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