Botrytis Resistance Genetics

Botrytis resistance genetics refer to heritable traits that confer susceptibility reduction to Botrytis cinerea (gray mold), a common fungal pathogen in cannabis cultivation. Plant breeders have identified and selected for morphological and physiological characteristics—such as dense trichome production, reduced leaf surface moisture retention, and improved air circulation through plant architecture—that correlate with lower infection rates. Lineage records frequently report botrytis-resistant phenotypes emerging from genetic backgrounds adapted to humid growing regions. Understanding these traits is critical for outdoor and greenhouse growers operating in climates prone to high humidity and condensation. Research into botrytis resistance remains ongoing, with breeders working to stack resistance markers while maintaining commercial yield and cannabinoid profiles.

Breeders select for botrytis resistance through phenotypic screening under high-humidity conditions and by crossing resistant parental lines to establish more stable resistant cultivars. Incorporating these genetics is particularly valuable for developing cultivars suited to challenging climates without relying solely on fungicide applications.