Species boundaries in fungi
Posted 20 December 2010 - 04:20 PM
Does anybody know a review that explain how to infer the relatedeness of different organisms, based on sequences of housekeeping genes? And the identity thresholds that make them belonging to the same species, or same genus, etc... Thanks.
Posted 21 December 2010 - 02:02 PM
Posted 22 December 2010 - 12:31 AM
The establishment of new species is often very subjective and depends on the "school" that dominates research on your fungi. Some groups create millions of s.sp./f.sp. and others make new species out of every different strain.
If you want to use DNA data, the story does not get easier. There are genera where only one nucleotide difference in the ITS is enough to qualify for a new species whereas in other genera you need more than 2% of difference. The same is true for other genes as well. Usually there is consent today that you need to find a clear, reproducible physiological/morphological difference between two isolates to qualify for separate species.
Good taxonomic works can be found in the "Studies in Mycocolgy" series, especially the issues entitled "Celebrating xy years of biodiversity" might contain some helpful works.
Edit: bad spelling
Edited by gebirgsziege, 22 December 2010 - 12:32 AM.