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Intraspecific Taxa (intraspecific + taxa)
Selected AbstractsTHE PHYLOGENY OF CAULERPA BASED ON RDNA INTERNAL TRANSCRIBED SPACER SEQUENCESJOURNAL OF PHYCOLOGY, Issue 2000S. Nemeth Phylogenetic hypotheses for the pantropical marine green algal genus, Caulerpa, were inferred based on analyses of nuclear-encoded rDNA internal transcribed spacer (ITS) sequences. Results of these analyses were used to assess the correspondence between rDNA phylogeny and traditional sectional taxonomy, to identify synapomorphic morphological characters (including assimilator morphology and chloroplast ultrastructure), and to examine marine biogeographic hypotheses for the genus. Ribosomal DNA ITS sequences were aligned for thirty-three species and intraspecific taxa of Caulerpa. Results indicate limited correspondence between phylogeny and sectional taxonomy for the genus, (e.g., the sections Filicoideae and Sedoideae were not monophyletic). In contrast, chloroplast morphology could be mapped to the tree topology with limited homoplasy. Pantropical isolates of the filicoidean species, Caulerpa sertularioides and Caulerpa mexicana each formed monophyletic groups. Caulerpa reyesii was included as a derived taxon within the Caulerpa taxifolia clade, suggesting that these species were conspecific and affirmed the lack of correspondence between phylogeny and assimilator morphology. Isolates and various intraspecific taxa of Caulerpa racemosa did not form a monophyletic group. Instead, these taxa formed a heterogeneous assemblage with other sedoidean and filicoidean taxa. Within the C. sertularioides clade, Caribbean and Atlantic isolates formed a basal paraphyletic group, whereas eastern and western Pacific isolates formed a more derived monophyletic group. Therefore, these results are not consistent with an Indo-West Pacific origin of this species. [source] Musa yunnanensis (Musaceae) and its intraspecific taxa in ChinaNORDIC JOURNAL OF BOTANY, Issue 5-6 2008Markku Häkkinen Musa yunnanensis Häkkinen & H. Wang (Musaceae) is distributed across the Mekong River watershed in Yunnan, China. In the present study its intraspecific taxa are thoroughly investigated. These wild Musa species and varieties are commonly planted for animal fodder in higher elevations due to their cold tolerance. Three varieties of M. yunnanensis described here as a new taxa, M.yunnanensis var. caii Häkkinen & H. Wang, M.yunnanensis var. yongpingensis Häkkinen & H. Wang and M.yunnanensis var. jingdongensis Häkkinen & H. Wang, are morphologically described and illustrated based on data from field studies in Yunnan, China in 2005, 2006 and 2007. A table with the diagnostic characters of the new varieties, as well as for M. yunnanensis var. yunnanensis, is provided. [source] | ||||||||||