Breeding resistance to fungal pathogens in lettuce

Context

Fungal plant pathogens cause substantial economic losses on a global scale, reducing the yield and quality of agricultural products. In general, the vast majority of growers resort to repetitive applications of fungicides to overcome fungal diseases, bringing concerns over public health and environmental risk. Botrytis cinerea (causal agent of grey mould) and Sclerotinia sclerotiorum (causal agent of white mould) are closely related necrotrophic pathogens, each able to infect over 200 species, including lettuce (Lactuca sativa).

The research

In the Denby Lab, high-throughput approaches such as transcriptome profiling (time series and across diversity sets), gene regulatory network modelling, and quantitative trait mapping are used to identify candidate genes and genetic markers associated with resistance to these fungal pathogens. We are also using gene editing to generate lettuce varieties with increased disease resistance. We focus on identifying transcriptional regulators of plant immunity with the ultimate goal to develop durable and sustainable resistance in host plants.