Non Mendelian Genetics

Non-Mendelian genetics describes inheritance patterns in cannabis that deviate from simple dominant/recessive models outlined by Mendel's laws. These include cytoplasmic inheritance (traits passed through maternal chloroplasts or mitochondria), epigenetic modifications (gene expression changes without DNA sequence alteration), and polygenic traits controlled by multiple loci with additive effects. Cannabis breeders frequently encounter non-Mendelian patterns when selecting for complex characteristics like cannabinoid ratios, terpene profiles, and plant architecture. Understanding these mechanisms helps explain why offspring sometimes display phenotypes unpredictable by standard pedigree analysis. Documentation of non-Mendelian traits remains important for refining breeding programs and establishing more accurate trait prediction models.

Breeders working with non-Mendelian inheritance patterns must employ larger sample sizes and multi-generational testing to reliably identify and stabilize desired traits. Recognition of maternal inheritance and epigenetic factors informs parent selection strategies and explains phenotypic variation in F1 crosses that single-gene models cannot predict.