Novel disease resistance in oilseed rape
A new form of resistance to light leaf spot ( Pyrenopeziza brassicae) has been identified in oilseed rape. Researchers at the UK’s Rothamsted Research (Harpenden, Hertfordshire) have identified a resistance gene (R gene) that blocks pathogen asexual reproduction. Fungal pathogens typically undergo asexual replication several times during a growing season, but reproduce sexually only once – at the end of the season. Blocking asexual reproduction significantly reduces the chances of a light leaf spot epidemic developing during the growing season, the study notes.