Assessment of introduced Kappaphycus (Solieriaceae, Rhodophyta) species relationships in China with molecular markers  

作　　者：LIU Chenlin HUANG Xiaohang LIU Jianguo 

机构地区：[1]Marine Ecological Center,The First Institute of Oceanography,State Oceanic Administration [2]Institute of Oceanology,the Chinese Academy of Sciences

出　　处：《Acta Oceanologica Sinica》2013年第2期59-65,共7页海洋学报（英文版）

基　　金：Basic Scientific Fund for National Public Research Institutes of China under contract No. 2008G19

摘　　要：Due to morphological plasticity and paucity of diagnostic morphological characters, the taxonomy of Kap- paphycus gets more and more confused with the expanding of commercial cultivation. In this study, the phylogenetic relationship of 13 strains of introduced Kappaphycus species in China was defined using DNA molecular markers, such as 18S rDNA, rbcL and cox2-cox3 spacer region. The resolutions obtained by three different molecular markers were compared： both cox2--cox3 spacer region and rbcL sequences are eligible in inter- species identification of Kappaphycus, whereas cox2-cox3 spacer region is more variable than rbcL sequence. There is several basepairs＇ discrepancy among 18S rDNA sequences, while it is 100% identical among both cox2-cox3 spacer region and rbcL sequences of the ten strains of K. alvarezii. We suppose that 18S rDNA sequence can provide more information in biogeography study of Kappaphycus than other two DNA sequences.Due to morphological plasticity and paucity of diagnostic morphological characters, the taxonomy of Kap- paphycus gets more and more confused with the expanding of commercial cultivation. In this study, the phylogenetic relationship of 13 strains of introduced Kappaphycus species in China was defined using DNA molecular markers, such as 18S rDNA, rbcL and cox2-cox3 spacer region. The resolutions obtained by three different molecular markers were compared： both cox2--cox3 spacer region and rbcL sequences are eligible in inter- species identification of Kappaphycus, whereas cox2-cox3 spacer region is more variable than rbcL sequence. There is several basepairs＇ discrepancy among 18S rDNA sequences, while it is 100% identical among both cox2-cox3 spacer region and rbcL sequences of the ten strains of K. alvarezii. We suppose that 18S rDNA sequence can provide more information in biogeography study of Kappaphycus than other two DNA sequences.

关 键 词：18S rDNA  cox2-cox3 spacer region  molecular marker  Kappaphycus rbcL 

分 类 号：Q949[生物学—植物学]