In an effort to clarify and standardize microbial taxonomy, the International Co

Question

In an effort to clarify and standardize microbial taxonomy, the International Committee on Systematics of Prokaryotes (ICSP) recommends four criteria to meet a "gold standard" for species assignment. Which of the following is not part of the criteria?

Bioinformatics ecotype analysis showing similar environmental niches

Phenotypic similarity to others microorganisms in the group

Whole genome similarity (as determined by DDH) of at least 70%

Melting temperature of the DNA (reflection of the G+C content) within 58C

Less than 3% divergence in rRNA gene sequence

Explanation / Answer

Answer is bioinformatic ecotype analysis showing similar environmental niches can not be the criteria because a particular niche can be shared by different species like a pond where bacteria can be present can also be a home for algae.

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