文献类型： 外文期刊
作者： Li, Yongfu 1 ; Li, Xuan 1 ; Nie, Shuai 2 ; Zhang, Min 1 ; Yang, Qinghua 1 ; Xu, Wenbin 5 ; Duan, Yifan 1 ; Wang, Xianrong 1 ;
作者机构： 1.Nanjing Forestry Univ, Coll Life Sci, Coinnovat Ctr Sustainable Forestry Southern China, Int Cultivar Registrat Ctr Osmanthus, Nanjing 210037, Jiangsu, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Guangdong, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Genet & Breeding High Qual Rice Southern C, Guangzhou 510640, Guangdong, Peoples R China
4.Guangdong Acad Agr Sci, Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Guangdong, Peoples R China
5.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China
关键词： phylogenomics; introgression; reticulate evolution; historical biogeography
期刊名称：PLANT JOURNAL （ 影响因子：7.2； 五年影响因子：7.9 ）
ISSN： 0960-7412
年卷期： 2023 年
页码：
收录情况： SCI
摘要： When interspecific gene flow is common, species relationships are more accurately represented by a phylogenetic network than by a bifurcating tree. This study aimed to uncover the role of introgression in the evolution of Osmanthus, the only genus of the subtribe Oleinae (Oleaceae) with its distribution center in East Asia. We built species trees, detected introgression, and constructed networks using multiple kinds of sequencing data (whole genome resequencing, transcriptome sequencing, and Sanger sequencing of nrDNA) combined with concatenation and coalescence approaches. Then, based on well-understood species relationships, historical biogeographic analyses and diversification rate estimates were employed to reveal the history of Osmanthus. Osmanthus originated in mid-Miocene Europe and dispersed to the eastern Tibetan Plateau in the late Miocene. Thereafter, it continued to spread eastwards. Phylogenetic conflict is common within the 'Core Osmanthus' clade and is seen at both early and late stages of diversification, leading to hypotheses of net-like species relationships. Incomplete lineage sorting proved ineffective in explaining phylogenetic conflicts and thus supported introgression as the main cause of conflicts. This study elucidates the diversification history of a relict genus in the subtropical regions of eastern Asia and reveals that introgression had profound effects on its evolutionary history.
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