SNP概论及应用。Single-nucleotidepolymorphism(SNP)isanewtermforanoldconcept.Geneticistshavebeentryingfordecadestofindthegeneticdifferencesamongindividuals.Originallyphenotypeswereused,thenproteinsequence,electrophoresis,restrictionfragmentpolymorphisms(RFLPs),andmicrosatellites.Withrecenttech-nologi