Analysis of microsatellite locus polymorphism in potato (<Emphasis Type="Italic">Solanum tuberosum</Emphasis>) cultivars of Russian breeding

Polymorphism of microsatellite loci of the nuclear genome was examined in 29 cultivars and accessions of wild potato (S. tuberosum, S. stoloniferum, S. demissum, and S. phureja). Nine SSR markers, most informative (PIC = 0.61–0.92) for genotyping of the cultivars of Russian breeding were selected. Polymorphism of the selected SSR loci was characterized, and prevailing, as well as unique SSR allele phenotypes were described. A total of 87 allele phenotypes were identified. The highest number of allele phenotypes was detected for the SSR1 (17), ST83/84 (12), and STRBCS1b (12) loci. The least numbers of allele phenotypes were typical of the ST47/48 (5) and STWIN12G (6) loci. Based on the microsatellite loci analyzed, for each of the cultivars examined, its allele formula was established. The latter can be uses as the cultivar molecular genetic passport. Diagnostic sets of most informative loci (SSR markers), enabling identification of the genotypes of all potato cultivars of Russian breeding examined, were determined