Evolutionary relationships in Panicoid grasses based on plastome phylogenomics (Panicoideae; Poaceae)

BMC Plant Biology

Research Article

Scot A. Kelchner¹  J. Chris Pires²  William P. Wysocki³  Melvin R. Duvall³  Sean V. Burke³  Patrick P. Edger⁴  Dustin Mayfield-Jones⁵  Lynn G. Clark⁶  Fernando O. Zuloaga⁷  Joseph M. Craine⁸ 

[1] Biological Sciences, Idaho State University, 921 S. 8th Ave, 83209-8007, Pocatello, ID, USA;Biological Sciences, University of Missouri, 371b Bond Life Sciences Center, 65211, Columbia, MO, USA;Department of Biological Sciences, Northern Illinois University, 1425 W. Lincoln Hwy, 60115-2861, DeKalb, IL, USA;Department of Horticulture, Michigan State University, 48823, East Lansing, MI, USA;Donald Danforth Plant Science Center, 975 North Warson Rd, 63132, St. Louis, MO, USA;Ecology, Evolution and Organismal Biology, 251 Bessey Hall, Iowa State University, 50011-1020, Ames, IA, USA;Instituto de Botánica Darwinion, Labardén 200, Casilla de Correo 22, B1642HYD, San Isidro, Buenos Aires, Argentina;Jonah Ventures, 66502, Manhattan, KS, USA;

关键词: Grasses;    mtDNA;    Next generation sequencing;    Panicoideae;    Paspalum;    Phylogenomics;    Plastome;    Poaceae;    ptDNA;    Subtribal systematics;   

DOI  :  10.1186/s12870-016-0823-3

 received in 2016-01-20, accepted in 2016-05-27,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundPanicoideae are the second largest subfamily in Poaceae (grass family), with 212 genera and approximately 3316 species. Previous studies have begun to reveal relationships within the subfamily, but largely lack resolution and/or robust support for certain tribal and subtribal groups. This study aims to resolve these relationships, as well as characterize a putative mitochondrial insert in one linage.Results35 newly sequenced Panicoideae plastomes were combined in a phylogenomic study with 37 other species: 15 Panicoideae and 22 from outgroups. A robust Panicoideae topology largely congruent with previous studies was obtained, but with some incongruences with previously reported subtribal relationships. A mitochondrial DNA (mtDNA) to plastid DNA (ptDNA) transfer was discovered in the Paspalum lineage.ConclusionsThe phylogenomic analysis returned a topology that largely supports previous studies. Five previously recognized subtribes appear on the topology to be non-monophyletic. Additionally, evidence for mtDNA to ptDNA transfer was identified in both Paspalum fimbriatum and P. dilatatum, and suggests a single rare event that took place in a common progenitor. Finally, the framework from this study can guide larger whole plastome sampling to discern the relationships in Cyperochloeae, Steyermarkochloeae, Gynerieae, and other incertae sedis taxa that are weakly supported or unresolved.

【 授权许可】

CC BY   
© The Author(s). 2016