Plastid genomes reveal evolutionary shifts in elevational range and flowering time of Osmanthus (Oleaceae)

Species of Osmanthus are economically important ornamental trees, yet information regarding their plastid genomes (plastomes) have rarely been reported, thus hindering taxonomic and evolutionary studies of this small but enigmatic genus. Here, we performed comparative genomics and evolutionary analy...

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Bibliographic Details
Main Authors: Duan, Y. (Author), Li, X. (Author), Li, Y. (Author), Sylvester, S.P (Author), Wang, X. (Author), Zhang, M. (Author)
Format: Article
Language:English
Published: John Wiley and Sons Ltd 2022
Subjects:
Online Access:View Fulltext in Publisher
LEADER 02494nam a2200253Ia 4500
001 10.1002-ece3.8777
008 220510s2022 CNT 000 0 und d
020 |a 20457758 (ISSN) 
245 1 0 |a Plastid genomes reveal evolutionary shifts in elevational range and flowering time of Osmanthus (Oleaceae) 
260 0 |b John Wiley and Sons Ltd  |c 2022 
856 |z View Fulltext in Publisher  |u https://doi.org/10.1002/ece3.8777 
520 3 |a Species of Osmanthus are economically important ornamental trees, yet information regarding their plastid genomes (plastomes) have rarely been reported, thus hindering taxonomic and evolutionary studies of this small but enigmatic genus. Here, we performed comparative genomics and evolutionary analyses on plastomes of 16 of the 28 currently accepted species, with 11 plastomes newly sequenced. Phylogenetic studies identified four main lineages within the genus that are here designated the: “Caucasian Osmanthus” (corresponding to O. decorus), “Siphosmanthus” (corresponding to O. sect. Siphosmanthus), “O. serrulatus + O. yunnanensis,” and “Core Osmanthus: (corresponding to O. sect. Osmanthus + O. sect. Linocieroides). Molecular clock analysis suggested that Osmanthus split from its sister clade c. 15.83 Ma. The estimated crown ages of the lineages were the following: genus Osmanthus at 12.66 Ma; “Siphosmanthus” clade at 5.85 Ma; “O. serrulatus + O. yunnanensis” at 4.89 Ma; and “Core Osmanthus: clade at 6.2 Ma. Ancestral state reconstructions and trait mapping showed that ancestors of Osmanthus were spring flowering and originated at lower elevations. Phylogenetic principal component analysis clearly distinguished spring-flowering species from autumn-flowering species, suggesting that flowering time differentiation is related to the difference in ecological niches. Nucleotide substitution rates of 80 common genes showed slow evolutionary pace and low nucleotide variations, all genes being subjected to purifying selection. © 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. 
650 0 4 |a ancestral state reconstruction 
650 0 4 |a ancestral trait reconstruction 
650 0 4 |a molecular clock 
650 0 4 |a plastomes 
650 0 4 |a purification selections 
700 1 |a Duan, Y.  |e author 
700 1 |a Li, X.  |e author 
700 1 |a Li, Y.  |e author 
700 1 |a Sylvester, S.P.  |e author 
700 1 |a Wang, X.  |e author 
700 1 |a Zhang, M.  |e author 
773 |t Ecology and Evolution