Classification System

Classification System

1. Phenetic Classification

   • Mutual similarity of phenotypic characteristics
   • Not dependant on phylogenetic relationship
   • Numerical Taxanomy
     • Simple matching coefficient
     • Jaccard coefficient
   • Sharing many characteristics
   • Info converted for numerical studies by computer
   • > 50 attributes for comparison
   • Morphological, biochemical, physiological
   • 80% - same species, 65% - same genus

2. Phylogenetic Classification

   • Evolutionary relationships
   • Highly conserved genetic sequence and advanced sequencing technique
   • Phylogenetic Treea
     • Nodes
     • Branches
     • Rooted
       • Shows common Ancestor
     • Unrooted

3. Genotypic classification

   • Polyphasic taxnomy
     • Apply more than 1 method for classification
   • Compare similarity between organisms
     • Individual genes
     • Whole genomes