Molecular Relationships Among the Gracilariaceae (Rhodophyta) - Further Observations On Some Undetermined Species

Bird, CJ, Ragan, MA, Critchley, AT, Rice, EL and Gutell, RR (1994) Molecular Relationships Among the Gracilariaceae (Rhodophyta) - Further Observations On Some Undetermined Species. European Journal of Phycology, 29 3: 195-202. doi:10.1080/09670269400650641


Author Bird, CJ
Ragan, MA
Critchley, AT
Rice, EL
Gutell, RR
Title Molecular Relationships Among the Gracilariaceae (Rhodophyta) - Further Observations On Some Undetermined Species
Journal name European Journal of Phycology   Check publisher's open access policy
ISSN 0967-0262
Publication date 1994-08-01
Year available 1994
Sub-type Article (original research)
DOI 10.1080/09670269400650641
Open Access Status Not yet assessed
Volume 29
Issue 3
Start page 195
End page 202
Total pages 8
Place of publication NEW YORK
Publisher CAMBRIDGE UNIV PRESS
Language eng
Abstract We have used molecular characteristics to clarify the taxonomic status of three problematic gracilarioid algae, by comparison with existing data for the Gracilariaceae. Nucleotide sequences of nuclear-encoded 18S rDNA were determined for an unidentified species of Gracilariopsis from North Carolina, and two infertile strains of gracilarioid algae from Namibia, tentatively assigned to Gracilariopsis. The sequence from the North Carolinian alga was intermediate between those established previously for Gracilariopsis lemaneiformis and European Gracilariopsis sp., and represents a different, probably undescribed, species. Sequences from the Namibian plants were characteristic of Gracilaria, and very similar to those from Gracilaria verrucosa and two closely related congeners. In parsimony, distance and maximum-likelihood analyses of these sequences and others already published for the Gracilariaceae, the North Carolinian Gracilariopsis sp. consistently grouped with its congeners, and the two Namibian strains with verrucosa-type species of Gracilaria. Restriction digestion of plastid DNA from the Namibian algae suggested that they were conspecific despite their different morphologies and agar characteristics. Moreover the restriction patterns were nearly identical with those observed previously for Gracilaria verrucosa, and the Namibian strains are probably referable to this species.
Keyword 18S Rdna
Fitch-Margoliash Distance
Gracilaria
Gracilariopsis
Maximum Likelihood
Parsimony
Verrucosa
Populations
Chilensis
Sequences
Seaweeds
Limits
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
 
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