c17 lecture 3

T: Phenetic organization, based on phenotypes

P: Based on evolutionary relationships

Incorporates various phenetic and phylogenetic information, with 16S RNA analysis

Father of Bacteriology

Sorted bacteria based on morphology

Bacteria that maintain the characteristics when cultured in the same conditions should be designated a species

D P C O F G S

- Prokaryotes lack sexual reproduction -> cant use interbreeding

- Collection of strains, housekeeping genes

Differ biochemically and physiologically

Differ morphologically

Differ in antigenic properties

First strain isolated, used as a reference

Genus species

G. Species

Pathogenic strain of bacteria after recieving new genetic information through HGT

• Based on as many characteristics as possible
• Morphological
• Physiological
• Ecological
• Molecular

• Life cycle patterns
• Symbiotic relationships
• Pathogenic ability
• Habitat
• Growth Requirements

• 1) Nucleic acid base composition
• 2) Nucleic acid hybridization
• 3) Nucleic acid sequencing
• 4) Genomic fingerprinting
• 5) Proteins
• 6) Fatty acids

25-80%

<10%

• 0-25% = different genera
• 25-75% = same genus, different species
• 75-100% = same species

Nucleic acid sequencing

1) Taxonomy not based on evolutive relationships

2) Asexual reproduction + HGT

3) No fossil record to support evolutive taxa