Medicinal mushroom Agaricus subrufescens from Iran shares genetic markers with specimens from China and Thailand
Valiollah Mahdizadeh, Naser Safaie, Ebrahim Mohammadi Goltapeh, Mohammad Reza Asef,
and Philippe Callac
Botany. 95: 579–585 (2017) dx.doi.org/10.1139/cjb-2016-0198
Agaricus subrufescens Peck is a cosmopolitan species of nutritional and medicinal interest. Three types of
internal transcribed spacer (ITS) rDNA sequences were recently characterized for this species. Sequences of types
A, B, or both types A and B are found in American and European specimens, while sequences of type C are found
in Asian (China and Thailand) and Oceanian (Hawaii) specimens. We report on a collection of this species from
Iran, for the first time. Both the morphological features and ITS sequence confirm its identification as A. subrufescens.
Its ITS sequence was of type C and even identical to that of specimens previously reported from Hawaii, China,
and Thailand. This sequence differed from those of Europe or the Americas, where most current cultivars originate.
The discovery of a specimen likely native to Iran extends the known distribution range of the ITS sequence
of type C from East Asia to Iran. More collections from West Asia (and elsewhere, for example Africa) would help
to better know the distribution area of the different types of ITS sequences and to increase the available germplasm
resources of A. subrufescens.
Key words: taxonomy, rDNA, ITS, Agaricaceae, Basidiomycota.