Abstract Detail



Pteridology

Zhang, Xin [1], Chen, De-Kui [2], Rothfels, Carl J. [3], Shepherd, Lara [4], Zhou, Xin-Mao [1], He, Hai [2], Gao, Xin-Fen [5], Zhang, Libing [1].

Phylogeny of Lycopodiaceae.

Lycopodiaceae contain about 388 lycophyte species distributed on all continents except the Antarctica and the highest diversity is found in tropical regions. Previous studies on the morphology, anatomy, cytology, and molecular systematics have made substantial progress in understanding the diversity and evolution of the family, but major issues remain: (1) The family is morphologically simple and thus taxonomically difficult; (2) The relationships among the genera have not been well established; and (3) The monophyly of many genera recognized has not robustly been tested. In this study, five plastid markers (atpA, psbA-trnH, rbcL, rps4-trnS, trnL-F) of 323 accessions representing ca. 130 (ca. 30% of all) species of Lycopodiaceae were used to infer a phylogeny. The major results included: (1) the tree is resolved into three major clades corresponding the three subfamilies: Huperzioideae, Lycopodioidieae, and Lycopodielloideae, with the latter two together as sister to the former; (2) Lycopodioidieae and Lycopodielloideae are more closely related with Huperzioideae; (3) the family is resolved into 17 clades, of which 16 represent 16 genera recognized in the PPG I classification. The 15 out of the 16 clades are well supported (ML BS≥96, MP JK≥86) as monophyletic except for the Huperzia clade. The Huperzia clade received weak support (ML BS=50,MP JK=55) when Phylloglossum is included in the analysis, but strongly supported (ML BS=80,MP JK=92) when Phylloglossum is excluded.


1 - Missouri Botanical Garden, Science & Conservation, P.O. Box 299, St. Louis, MO, 63166, United States
2 - College of Life Science, Chongqing, , Normal University, Shapingba, Chongqing, 401331, China
3 - University of California, Berkeley, Department of Integrative Biology, Berkeley, CA, 94720
4 - Museum Of New Zealand Te Papa Tongarewa, 26 Thane Rd, Wellington, WGN, 6011, New Zealand
5 - CAS Key Laboratory of Mountain Ecological Restoration and Bioresource , Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu Sichuan , 610041, China

Keywords:
classification
club mosses
Lycopodiaceae.

Presentation Type: Oral Paper
Number:
Abstract ID:714
Candidate for Awards:None


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