The most polymorphic marker system is:
Simple sequence repeats exhibit exceptional polymorphism due to high mutation rates caused by slipped-strand mispairing during DNA replication. Variable repeat numbers generate many alleles per locus, often exceeding ten in diverse germplasm, providing high polymorphic information content and heterozygosity values. Their codominant, multiallelic nature surpasses biallelic SNPs, low polymorphism RFLPs and dominant RAPD markers that detect fewer loci. Widespread genomic distribution, excellent reproducibility and ease of PCR detection further enhance utility for linkage mapping, population struc
Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.
