Relationships Among Eucheuma-Denticulatum, Eucheuma-Isiforme and Kappaphycus-Alvarezii (Gigartinales, Rhodophyta) Based On Nuclear Ssu-Ribosomal-Rna Gene-Sequences

Lluisma, AO and Ragan, MA (1995) Relationships Among Eucheuma-Denticulatum, Eucheuma-Isiforme and Kappaphycus-Alvarezii (Gigartinales, Rhodophyta) Based On Nuclear Ssu-Ribosomal-Rna Gene-Sequences. Journal of Applied Phycology, 7 5: 471-477. doi:10.1007/BF00003931


Author Lluisma, AO
Ragan, MA
Title Relationships Among Eucheuma-Denticulatum, Eucheuma-Isiforme and Kappaphycus-Alvarezii (Gigartinales, Rhodophyta) Based On Nuclear Ssu-Ribosomal-Rna Gene-Sequences
Journal name Journal of Applied Phycology   Check publisher's open access policy
ISSN 0921-8971
Publication date 1995-10-01
Year available 1995
Sub-type Article (original research)
DOI 10.1007/BF00003931
Open Access Status Not yet assessed
Volume 7
Issue 5
Start page 471
End page 477
Total pages 7
Place of publication DORDRECHT
Publisher Kluwer Academic Publishers
Language eng
Abstract The nuclear genes encoding small-subunit ribosomal RNAs (ssu-rDNAs) of the carrageenophytes Eucheuma denticulatum, E. isiforme and Kappaphycus alvarezii were amplified by the polymerase chain reaction, cloned and sequenced. The sequences range from 1767 (K. alvarezii) to 1781 (E. isiforme) nucleotides in length, and have guanine+cytosine contents between 51.2% (E. isiforme) and 51.5% (E. denticulatum). Pairwise sequence identities among these sequences ranged from 97.6% to 98.5%, levels comparable to some intergeneric identities within Gracilariales. In phylogenetic analyses, the two Eucheuma ssu-rDNAs group stably together vis-a-vis the ssu-rDNA of K. alvavezii, and these three ssu-rDNAs form a monophyletic group within a larger grouping of other carrageenophytes. The results demonstrate quantitatively that analysis of nuclear-encoded ssu-rDNA sequences is likely to be useful. in resolving taxonomic, phylogenetic and biogeographic questions among tribe Eucheumatoideae Doty.
Keyword Carrageenophyte
Eucheuma
Kappaphycus
Rdna Sequence
Systematics
Gracilaria-Verrucosa
Ribosomal-Rna
Evolution
Algae
Red
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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