Recent and Historical Gene Flow in Cultivars, Landraces, and a Wild Taxon of Cucurbita pepo in Mexico

Gene flow among crops and their wild relatives is an active study area in evolutionary biology horticulture, because genetic exchange between them may impact trajectories increase the variation of cultivated lineages. Mexico a center diversity for genus Cucurbita that includes pumpkins, squash gourds. domesticated species has been reported as common ; but gene populations C. pepo ssp. from its relative not studied. We used 2,061 SNPs, derived tunable genotyping by sequencing (tGBS) to estimate 14 Mexican traditional landraces , also including individuals five improved cultivars ovifera var. fraterna . found moderate high levels diversity, low differentiation. In test introgression lineages, we all possible arrangements ancestral sites lineages showed similar frequencies; thus, incomplete lineage sorting, flow, might be taking place Overall, our results suggest these subspecies cultigens, sorting retention characters shaped trajectory origin diversification. addition, evidence use material improvement commercial cultivars. The are important source which preserved both management practices small farmers natural exists different crop fields region.