干旱区生态环境知识资源中心(Arid): Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species

Arid

DOI	10.1186/s12862-018-1308-9
	Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species
	Cardinal-McTeague, Warren M.1,2,3; Wurdack, Kenneth J.3; Sigel, Erin M.4; Gillespie, Lynn J.1,2
通讯作者	Cardinal-McTeague, Warren M.
来源期刊	BMC EVOLUTIONARY BIOLOGY
ISSN	1471-2148
出版年	2019
卷号	19
英文摘要	BackgroundPlukenetia is a small pantropical genus of lianas and vines with variably sized edible oil-rich seeds that presents an ideal system to investigate neotropical and pantropical diversification patterns and seed size evolution. We assessed the biogeography and seed evolution of Plukenetia through phylogenetic analyses of a 5069 character molecular dataset comprising five nuclear and two plastid markers for 86 terminals in subtribe Plukenetiinae (representing 20 of 23 Plukenetia species). Two nuclear genes, KEA1 and TEB, were used for phylogenetic reconstruction for the first time. Our goals were: (1) produce a robust, time-dependent evolutionary framework for Plukenetia using BEAST; (2) reconstruct its biogeographical history with ancestral range estimation in BioGeoBEARS; (3) define seed size categories; (4) identify patterns of seed size evolution using ancestral state estimation; and (5) conduct regression analyses with putative drivers of seed size using the threshold model.ResultsPlukenetia was resolved into two major groups, which we refer to as the pinnately- and palmately-veined clades. Our analyses suggest Plukenetia originated in the Amazon or Atlantic Forest of Brazil during the Oligocene (28.7 Mya) and migrated/dispersed between those regions and Central America/Mexico throughout the Miocene. Trans-oceanic dispersals explain the pantropical distribution of Plukenetia, including from the Amazon to Africa in the Early Miocene (17.4 Mya), followed by Africa to Madagascar and Africa to Southeast Asia in the Late Miocene (9.4 Mya) and Pliocene (4.5 Mya), respectively. We infer a single origin of large seeds in the ancestor of Plukenetia. Seed size fits a Brownian motion model of trait evolution and is moderately to strongly associated with plant size, fruit type/dispersal syndrome, and seedling ecology. Biome shifts were not drivers of seed size, although there was a weak association with a transition to fire prone semi-arid savannas.ConclusionsThe major relationships among the species of Plukenetia are now well-resolved. Our biogeographical analyses support growing evidence that many pantropical distributions developed by periodic trans-oceanic dispersals throughout the Miocene and Pliocene. Selection on a combination of traits contributed to seed size variation, while movement between forest edge/light gap and canopy niches likely contributed to the seed size extremes in Plukenetia.
英文关键词	Divergence dating KEA1 Lite Blue Devil Long-distance dispersal Plukenetieae Sacha Inchi Seed ecology TEB
类型	Article
语种	英语
国家	Canada ; USA
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000456395100002
WOS关键词	MOLECULAR PHYLOGENETIC ANALYSIS ; MULTIPLE SEQUENCE ALIGNMENT ; FOUNDER-EVENT SPECIATION ; LONG-DISTANCE DISPERSAL ; HISTORICAL BIOGEOGRAPHY ; ATLANTIC FOREST ; MODEL SELECTION ; PLASTID RBCL ; GENOME SIZE ; INCLUDING 2
WOS类目	Evolutionary Biology ; Genetics & Heredity
WOS研究方向	Evolutionary Biology ; Genetics & Heredity
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214687
作者单位	1.Univ Ottawa, Dept Biol, Gendron Hall,Room 160,30 Marie Curie, Ottawa, ON K1N 6N5, Canada; 2.Canadian Museum Nat, Res & Collect, POB 3443,Stn D, Ottawa, ON K1P 6P4, Canada; 3.Smithsonian Inst, Natl Museum Nat Hist, Dept Bot, MRC-166,POB 37012, Washington, DC 20013 USA; 4.Univ Louisiana Lafayette, Dept Biol, Billeaud Hall,Room 108,410 E St Mary Blvd, Lafayette, LA 70503 USA
推荐引用方式 GB/T 7714	Cardinal-McTeague, Warren M.,Wurdack, Kenneth J.,Sigel, Erin M.,et al. Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species[J],2019,19.
APA	Cardinal-McTeague, Warren M.,Wurdack, Kenneth J.,Sigel, Erin M.,&Gillespie, Lynn J..(2019).Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species.BMC EVOLUTIONARY BIOLOGY,19.
MLA	Cardinal-McTeague, Warren M.,et al."Seed size evolution and biogeography of Plukenetia (Euphorbiaceae), a pantropical genus with traditionally cultivated oilseed species".BMC EVOLUTIONARY BIOLOGY 19(2019).