Deciphering complex reticulate evolution of Asian Buddleja (Scrophulariaceae): insights into the taxonomy and speciation of polyploid taxa in the Sino-Himalayan region
文献类型：期刊论文
| 作者 | Yang,Fengmao; Ge,Jia ; Guo,Yongjie; Olmstead,Richard; Sun,Weibang
|
| 刊名 | ANNALS OF BOTANY
 |
| 出版日期 | 2023 |
| 关键词 | Buddleja phylogenomics reticulate evolution polyploidy plastid genome low-copy nuclear gene HYBRIDIZATION ALIGNMENT DIVERSIFICATION ALLOPOLYPLOIDY PHYLOGENETICS FRAMEWORK NUCLEAR ROBUST FLOW |
| ISSN号 | 1095-8290 |
| DOI | 10.1093/aob/mcad022 |
| 英文摘要 | Background and Aims Species of the genus Buddleja in Asia are mainly distributed in the Sino-Himalayan region and form a challenging taxonomic group, with extensive hybridization and polyploidization. A phylogenetic approach to unravelling the history of reticulation in this lineage will deepen our understanding of the speciation in biodiversity hotspots. Methods For this study, we obtained 80 accessions representing all the species in the Asian Buddleja clade, and the ploidy level of each taxon was determined by flow cytometry analyses. Whole plastid genomes, nuclear ribosomal DNA, single nucleotide polymorphisms and a large number of low-copy nuclear genes assembled from genome skimming data were used to investigate the reticulate evolutionary history of Asian Buddleja. Complex cytonuclear conflicts were detected through a comparison of plastid and species trees. Gene tree incongruence was also analysed to detect any reticulate events in the history of this lineage. Key Results Six hybridization events were detected, which are able to explain the cytonuclear conflict in Asian Buddleja. Furthermore, PhyloNet analysis combining species ploidy data indicated several allopolyploid speciation events. A strongly supported species tree inferred from a large number of low-copy nuclear genes not only corrected some earlier misinterpretations, but also indicated that there are many Asian Buddleja species that have been lumped mistakenly. Divergent time estimation shows two periods of rapid diversification (8-10 and 0-3 Mya) in the Asian Buddleja clade, which might coincide with the final uplift of the Hengduan Mountains and Quaternary climate fluctuations, respectively. Conclusions This study presents a well-supported phylogenetic backbone for the Asian Buddleja species, elucidates their complex and reticulate evolutionary history and suggests that tectonic activity, climate fluctuations, polyploidization and hybridization together promoted the diversification of this lineage. |
| 学科主题 | Plant Sciences |
| WOS记录号 | WOS:000945929800001 |
| 源URL | [http://ir.kib.ac.cn/handle/151853/74890]  |
| 专题 | 中国科学院昆明植物研究所 |
| 推荐引用方式 GB/T 7714 | Yang,Fengmao,Ge,Jia,Guo,Yongjie,et al. Deciphering complex reticulate evolution of Asian Buddleja (Scrophulariaceae): insights into the taxonomy and speciation of polyploid taxa in the Sino-Himalayan region[J]. ANNALS OF BOTANY,2023. |
| APA | Yang,Fengmao,Ge,Jia,Guo,Yongjie,Olmstead,Richard,&Sun,Weibang.(2023).Deciphering complex reticulate evolution of Asian Buddleja (Scrophulariaceae): insights into the taxonomy and speciation of polyploid taxa in the Sino-Himalayan region.ANNALS OF BOTANY. |
| MLA | Yang,Fengmao,et al."Deciphering complex reticulate evolution of Asian Buddleja (Scrophulariaceae): insights into the taxonomy and speciation of polyploid taxa in the Sino-Himalayan region".ANNALS OF BOTANY (2023). |
入库方式： OAI收割
来源：昆明植物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。