Intraspecific differentiation of Limonium wrightii (Plumbaginaceae) on northwestern Pacific Islands: rate heterogeneity in nuclear rDNA and its distance-independent geographic structure.
We conducted a molecular phylogenetic analysis of a coastal sea lavender in NW Pacific using ITS sequences of nrDNA. As a result, the ITS sequences of populations on the oceanic Daito Islands were considerably different from conspecific others in nine apomorphic substitutions. This finding indicates a distance-independent geographical structure of the genetic variation among islands in NW Pacific. The calibrated rate of nucleotide substitutions in the ITS regions within L. wrightii (average: 1.41x10(-8) substitutions per site per year) was higher than any other instances of substitution rates in flowering plants.
Matsumura
Shun'ichi
S
Biological Institute, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan. flores@cello.ocn.ne.jp
Yokoyama
Jun
J
Fukuda
Tatsuya
T
Maki
Masayuki
M
D018744:DNA, Plant / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D019143:Evolution, Molecular; D014644:Genetic Variation; D005828:Genetics, Population; D005843:Geography; D006239:Haplotypes; D016013:Likelihood Functions; D008957:Models, Genetic; D010139:Pacific Islands; D010802:Phylogeny; D029606:Plumbaginaceae / Q000145:classification / Q000235:genetics*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
D018744:DNA, Plant; D021903:DNA, Ribosomal Spacer