Phylogeography of the mediterranean green seaweed Halimeda tuna (Ulvophyceae, Chlorophyta).

Publisher: Wiley Periodicals Inc Country of Publication: United States NLM ID: 9882935 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1529-8817 (Electronic) Linking ISSN: 00223646 NLM ISO Abbreviation: J Phycol Subsets: MEDLINE

Publication: <2015-> : Malden, MA : Wiley Periodicals Inc.
Original Publication: [New York] Phycological Society of America.

Chlorophyta*/genetics ; Seaweed*; Bayes Theorem ; DNA, Mitochondrial ; Genetic Variation ; Haplotypes ; Italy ; Mediterranean Sea ; Phylogeny ; Phylogeography

Populations of many Mediterranean marine species show a strong phylogeographic structure, but the knowledge available for native seaweeds is limited. We investigated the genetic diversity of the green alga Halimeda tuna based on two plastid markers (tufA gene and a newly developed amplicon spanning five ribosomal protein genes and intergenic spacers, the rpl2-rpl14 region). The tufA sequences showed that Mediterranean H. tuna represents a single, well-defined species. The rpl2-rpl14 results highlighted a genetic separation between western and eastern Mediterranean populations; specimens collected from widely scattered locations in the Adriatic/Ionian region shared a haplotype unique to this region, and formed a group separated from all western Mediterranean regions. Specimens from Sardinia also formed a unique haplotype. Within the western Mediterranean basin, a gradual shift in the frequency of haplotypes was apparent along a West-East gradient. Our results represent the first clear evidence of an East-West genetic cleavage in a native Mediterranean macroalga and offer an interesting perspective for further research into fine-scale seaweed population structure in the NW Mediterranean Sea.
(© 2020 Phycological Society of America.)

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Keywords: Halimeda; Mediterranean seaweeds; Messinian Salinity Crisis; Pleistocene glaciations; phylogeography

0 (DNA, Mitochondrial)

Date Created: 20200422 Date Completed: 20210203 Latest Revision: 20220531

20250114

10.1111/jpy.13006

32315445