Phylogeography of Asparagopsis taxiformis revisited: Combined mtDNA data provide novel insights into population structure in Japan

Akira Kurihara, Hanna Horiguchi, Takeaki Hanyuda, Hiroshi Kawai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Six intraspecific lineages (Lineages 1-6) of Asparagopsis taxiformis have been previously established based on mitochondrial cox2-cox3 intergenic spacer and a partial cox1 sequences. 'Lineage 2' (L2) was suggested to be a recent introduction to the Mediterranean Sea, but its source population has not yet been identified. In order to clarify the nature of northwestern Pacific populations, we performed extensive sampling in Japan (60 individuals from 16 locations) and molecular phylogenetic analyses based on mitochondrial sequences. Sixteen additional individuals, collected from eight locations in the Indo-Pacific, Caribbean, and Mediterranean regions, were also analyzed. Combined sequence analyses revealed that the Japanese populations only consisted of L2. Out of 19 combined haplotypes identified within L2, two are shared between Japan and the Mediterranean Sea and the Hawaiian Islands, and 12 were identified as endemic to Japan. Genetic analyses of population differentiation suggested that Japanese populations are genetically isolated from the Mediterranean and the Hawaiian populations. A genetic disjunction appears to separate two subpopulations within Japan: one between Toi and Kagoshima and the other between Ojikajima Island and Kagoshima in the Kyushu area.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalPhycological Research
Volume64
Issue number2
DOIs
Publication statusPublished - Apr 1 2016

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Aquatic Science
  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science

Fingerprint Dive into the research topics of 'Phylogeography of Asparagopsis taxiformis revisited: Combined mtDNA data provide novel insights into population structure in Japan'. Together they form a unique fingerprint.

  • Cite this