Abstract
Conserved sequences are molecular fossil record of any organism and their evolution can be traced using the sequences. Genus Pleurotus is one of the most cultivated mushroom species for food purposes. To trace the evolution in Pleurotus species, two conserved sequences (ITS and LSU) of twenty three species were analysed and phylogenetic relationship was studied to see evolution pattern linked with domestication. The sequence were analysed using the Molecular Evolutionary Genetics Analysis (MEGA) and Bayesian phylogenetic analysis (Mr. Bayes). Analysis of LSU and ITS categorized the Pleurotus species into two groups. The differences in evolutionary rate among various species were ascertained. Grouping of sequences confirmed that cultivation requirements of Pleurotus species might be due to allopatric variation occurred during the evolution. Our results suggested that summer and winter species of Pleurotus might be evolved at different evolutionary rate.
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