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Issue: Vol. 329 No. 2: 28 November 2017
Type: Article
Published: 2017-11-28
DOI: 10.11646/phytotaxa.329.2.2
Page range: 114–126
Abstract views: 23
PDF downloaded: 2

New subtribe Pachitinae (Orchideae) of Orchidaceae: Evidence from morphological and molecular analyses

College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Shenzhen Key Laboratory for Orchid Conservation and Utilization, the National Orchid Conservation Centre of China and the Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China
Shenzhen Key Laboratory for Orchid Conservation and Utilization, the National Orchid Conservation Centre of China and the Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China
College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Shenzhen Key Laboratory for Orchid Conservation and Utilization, the National Orchid Conservation Centre of China and the Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China
College of Landscape, Fujian Agriculture and Forestry University, Fuzhou 350002, China
College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Orchideae Pachitinae Orchideae phylogenetics Pachites Monocots

Abstract

The subtribal delimitation and relationships of Orchideae remain unresolved. In the present study, the phylogenetic relationships among all subtribes of Orchideae were reconstructed, utilizing five plastid and two nuclear DNA sequences (rbcL, trnS-trnG, matK, trnL-F, psbA-trnH, Xdh and ITS) from 178 taxa of Orchideae. The combined results show that most clades are successively sister to the grade of clades representing antecedently accepted subtribes, but Pachites and Huttonaea do not belong to the previous classification of Disinae. In contrast, these two genera represent two additional isolated lineages. On this basis, a new subtribe, Pachitinae, is tentatively proposed to accommodate this taxon. Also, the subtribe Huttonaeinae Schltr. was recovered (1926: 568). In addition to the taxonomic treatment of this subtribe, the delimitation of many related subtribes in Orchideae is discussed.