classification

classification

1. phenetic classification

   • observed physical characteristics
   • method: 1)numerical taxonomy
     • simple matching coefficient(Ssm)
     • Jaccard coefficient(Sj)
   • 2)unweighted comparison

2. phylogenetic classification

   • highly conserved genetic sequence-16S rRNA or 18S rRNA
     • method:Polymerase chain reaction
   • advancement in sequencing technique
   • Phylogenetic tree
     • node
       • external -living species
       • internal-ancestor
     • branch:represent the evolutionary distance in between 2 species
     • rooted
     • unrooted

3. Genotypic Classification

   • compare genetic similarity between organisms