Phylogeography of the Northern Atlantic species Chondrus crispus (Gigartinales, Rhodophyta) inferred from nuclear rDNA internal transcribed spacer sequences |
| |
| Authors: | Zimin Hu Xiaoqi Zeng Alan T Critchley Steve L Morrell and Delin Duan |
| |
| Institution: | (1) Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, P. R. China;(2) Division of Life Science and Technology, Ocean University of China, Qingdao, 266003, P. R. China;(3) Acadian Seaplants Limited, 30 Brown Avenue, B3B 1x8 Dartmouth, Nova Scotia, Canada;(4) Dale Fort Field Centre, Dale, Pembrokeshire, SA62 3RD, UK |
| |
| Abstract: | Eighteen isolates of the red algae Chondrus crispus were collected from Northern Atlantic sites, together with C. ocellatus, C. yendoi and C. pinnulatus from the North Pacific. The nuclear rDNA internal transcribed spacer (ITS) was sequenced and compared, spanning both the
ITS regions and the 5.8S rRNA gene. Percentage of nucleotide variation for C. crispus ranged from 0.3% to 4.0%. Phylogenetic analyses were performed using maximum parsimony (MP), neighbor-joining (NJ) and minimum
evolution methods. They showed that two main clades existed within the C. crispus samples examined and that suggested C. crispus had a single Atlantic origin. The clustering however did not follow the geographic origin. We hypothesized that the current
distribution of C. crispus populations might be a result of three main factors: temperature boundaries, paleoclimate and paleoceanography. ITS data
exhibited abundant molecular information not only for phylogeographical investigation but also for systematics studies.
Handling editor: C. Sturmbauer |
| |
| Keywords: | Chondrus crispus Internal transcribed spacer Phylogeography Red algae |
| 本文献已被 SpringerLink 等数据库收录！ |
|
