TY - JOUR
T1 - Biosystematic studies on the family tofieldiaceae III. classification of tofieldia nuda into three species and three varieties
AU - Tamura, Minoru N.
AU - Fuse, Shizuka
AU - Lee, Nam Sook
AU - Kim, Jin Ohk
AU - Yamashita, Jun
AU - Ishii, Takaaki
PY - 2011/10/1
Y1 - 2011/10/1
N2 - In order to reexamine the taxonomic coherence of Tofieldia nuda, which shows wide morphological variation within the species, we analysed sequences of plastid trnK, trnL, and trnL-F and nuclear ITS of T. nuda and seven further species of Tofieldia. We found that T. nuda contains three different lineages supported with 99% or 100% bootstrap value: one lineage sister to T. coccinea (100%), one linage sister to the Chinese species T. divergens and T. thibetica (98%-100%), and a third lineage sister to the second lineage plus T. divergens and T. thibetica (99%-100%). As the wide morphological gaps among T. nuda, T. coccinea, T. divergens, and T. thibetica prevent us from considering them as conspecific with one another, the three lineages of T. nuda are regarded as different at the species level. The first lineage corresponds to T. nuda s.str., the second to T. furusei (formerly T. nuda var. furusei), and the third to T. yoshiiana, often considered a synonym of T. nuda. Tofieldia yoshiiana is further divided into three varieties, var. yoshiiana, var. kanwonensis comb. nov. and var. hyugaensis var. nov. A key to the three species and varieties is provided.
AB - In order to reexamine the taxonomic coherence of Tofieldia nuda, which shows wide morphological variation within the species, we analysed sequences of plastid trnK, trnL, and trnL-F and nuclear ITS of T. nuda and seven further species of Tofieldia. We found that T. nuda contains three different lineages supported with 99% or 100% bootstrap value: one lineage sister to T. coccinea (100%), one linage sister to the Chinese species T. divergens and T. thibetica (98%-100%), and a third lineage sister to the second lineage plus T. divergens and T. thibetica (99%-100%). As the wide morphological gaps among T. nuda, T. coccinea, T. divergens, and T. thibetica prevent us from considering them as conspecific with one another, the three lineages of T. nuda are regarded as different at the species level. The first lineage corresponds to T. nuda s.str., the second to T. furusei (formerly T. nuda var. furusei), and the third to T. yoshiiana, often considered a synonym of T. nuda. Tofieldia yoshiiana is further divided into three varieties, var. yoshiiana, var. kanwonensis comb. nov. and var. hyugaensis var. nov. A key to the three species and varieties is provided.
KW - ITS
KW - Molecular phylogeny
KW - Taxonomy
KW - trnK
KW - trnL
KW - trnL-F
UR - http://www.scopus.com/inward/record.url?scp=80054913459&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80054913459&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:80054913459
VL - 60
SP - 1339
EP - 1348
JO - Taxon
JF - Taxon
SN - 0040-0262
IS - 5
ER -