Botrytis Resistance Genetics

Botrytis resistance genetics refer to heritable traits that confer susceptibility reduction to Botrytis cinerea (gray mold), a fungal pathogen affecting cannabis cultivation. These traits are identified through selective breeding programs and phenotypic observation across generations. Breeders working in temperate and humid climates have documented varying resistance levels across different cultivar families, though environmental control remains the primary management strategy. Lineage records frequently report that certain landrace and hybrid backgrounds show reduced disease pressure under high-moisture conditions. Resistance genetics are often polygenic, meaning multiple genes contribute to the overall phenotype. This classification remains empirically valuable for growers in challenging climates, though resistance is never absolute.

Breeders incorporate botrytis-resistant parent material to reduce crop loss in outdoor and greenhouse settings, particularly in regions with persistent humidity. Selecting for traits like open flower structure and faster bud maturation can support disease resilience without relying on monogenic resistance mechanisms.