A multigene phylogeny of the Gelidiales including nuclear large-subunit rRNA sequence data

被引:40
作者
Freshwater, DW
Bailey, JC
机构
[1] UNCW, Marine Sci Res Ctr, Wilmington, NC 28403 USA
[2] Bigelow Lab Ocean Sci, Boothbay Harbor, ME 04575 USA
基金
美国国家科学基金会;
关键词
Gelidiales phylogeny; gene evolution; LSU; rbcL; SSU;
D O I
10.1023/A:1008075429646
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Partial sequences (1032 bp) of the nuclear-encoded large ribosomal RNA gene (LSU) were determined for 16 gelidialean species, and analyzed separately and in combination with plastid rbcL and nuclear SSU gene sequences. The number of informative characters and levels of sequence divergence among taxa are intermediate in LSU sequences as compared to that for rbcL and SSU. Analyses of the separate LSU, and a combined LSU, SSU, and rbcL data sets have identified early-diverging lineages within the Gelidiales including Gelidiella, Pterocladia, Pterocladiella, and a lineage including Gelidium and species classified in other genera. The relationships among most gelidialean taxa are well-resolved and well-supported by analyses of the combined data; however, the relationships of Ptilophora and Capreolia remain unclear. It is speculated that these two lineages have diverged from a common ancestor over an evolutionarily short period of time.
引用
收藏
页码:229 / 236
页数:8
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