Genetic analysis of citron ( Citrus medica L.) using simple sequence repeats and single nucleotide polymorphisms

•Studied 47 citrons; many from Yunnan, an area of origin; many novel taxa.•Conducted analysis using microsatellites and single nucleotide polymorphisms.•Heterozygosity observed in some. Structure analysis revealed three populations.•Clusters 1 and 2 from China (non-fingered, fingered); cluster 3 from Mediterranean.•A citron-specific microsatellite marker identified.