Analysis of Genetic Diversity, Population Structure and Association Mapping for Late Blight Resistance in Potato (Solanum tuberosum L.) Accessions Using SSR Markers

The allelic variations in a diversity panel of 353 potato accessions, including 256 accessions belonging to Solanum tuberosum sub spp. tuberosum, 49 andigena, and 48 Indian varieties were analysed using 25 simple sequence repeat (SSR) markers. SSR profiles revealed high levels polymorphism distinctness among the studied. A total 343 alleles markers observed highly diverse tetraploid accessions. number produced per varied from 8 for marker STM1053 STIKA. polymorphic information content (PIC) ranged 0.66 (STG0010) 0.93 (STM1106) with an average 0.82. cluster analysis divided population into five major groups. association mapping late blight resistance identified six general linear model (GLM), out these significance three was reconfirmed mixed (MLM). findings this study suggest that SSRs are appropriate evaluating genetic structure within different germplasm collections. significant across observed. Moreover, could be useful marker-assisted selection (MAS) breeding (LBR).