부산대학교 도서관

Compsopogon specimens collected in China were examined based on morphology and DNA sequences. Five molecularmarkers from different genome compartments including rbcL, COI, 18S rDNA, psbA, and UPA were identified andused to construct a phylogenetic relationship. Phylogenetic analyses indicated that two different morphological typesfrom China clustered into an independent clade with Compsopogon specimens when compared to other global samples. The Compsopogon clade exhibited robust support values, revealing the affiliation of the samples to Compsopogon caeruleus. Although the samples were distributed in a close geographical area, unexpected sequence divergences betweenthe Chinese samples implied that they were introduced by different dispersal events and from varied origins. It wasspeculated that Compsopogon originated in North America, a portion of the Laurentia landmass situated in the Rodiniasupercontinent at approximately 573.89-1,701.50 million years ago during the Proterozoic era. Although Compsopogonhad evolved for a rather long time, genetic conservation had limited its variability and rate of evolution, resulting in thecurrent monospecific global distribution. Additional global specimens and sequence information were required to increaseour understanding of the evolutionary history of this ancient red algal lineage.