The invention relates to methods of identifying and characterizing a Cannabis spp. plant comprising a quantitative trait locus (QTL) or a causal polymorphism associated with a flower density trait, and to Cannabis spp. plants having a flower density trait of interest comprising defined allelic states of polymorphisms defining the QTL or defined allelic states of causal polymorphisms provided herein. Also provided are Cannabis spp. plants with a flower density trait of interest comprising defined allelic states of polymorphisms and plants identified, characterized or produced by the methods described. Further provided are methods of marker assisted selection, genomic selection, marker assisted breeding, and genetic modification, for obtaining plants having a flower density trait of interest.

Provided herein are methods and compositions for producing pea plants having a desirable yield, height, and/or lodging phenotype using marker-assisted selection. The disclosure further provides methods and compositions for introgressing one or more loci comprising at least an allele linked to the yield, height, and/or lodging QTL, thus producing pea plants with a desirable yield, height, and/or lodging phenotype.