Multi-locus phylogeny of Bryoria reveals recent diversification and unexpected diversity in section Divaricatae

doi:10.1017/S0024282923000555

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	Multi-locus phylogeny of Bryoria reveals recent diversification and unexpected diversity in section Divaricatae
	Myllys,Leena; Pino-Bodas,Raquel; Velmala,Saara; Wang,Li-Song; Goward,Trevor
	2023
发表期刊	LICHENOLOGIST
ISSN	1096-1135
摘要	In recent years, the genus Bryoria (Parmeliaceae, Lecanoromycetes) has been the subject of considerable phylogenetic scrutiny. Here we used information on six gene regions, three nuclear protein-coding markers (Mcm7, GAPDH and Tsr1), two nuclear ribosomal markers (ITS and IGS) and a partial mitochondrial small subunit (mtSSU), to examine infrageneric relationships in the genus and to assess species delimitation in the Bryoria bicolor/B. tenuis group in section Divaricatae. For this purpose, phylogenetic analyses and several of the available algorithms for species delimitation (ASAP, GMYC single, GMYC multiple and bPTP) were employed. We also estimated divergence times for the genus using *BEAST. Our phylogenetic analyses based on the combined data set of six gene loci support the monophyly of sections Americanae, Divaricatae and Implexae, while section Bryoria is polyphyletic and groups in two clades. Species from Bryoria clade 1 are placed in an emended section Americanae. Our study reveals that section Divaricatae is young (c. 5 My) and is undergoing diversification, especially in South-East Asia and western North America. Separate phylogenetic analyses of section Divaricatae using ITS produced a topology congruent with the current species concepts. However, the remaining gene regions produced poorly resolved phylogenetic trees and the different species delimitation methods also generated highly inconsistent results, congruent with other studies that highlight the difficulty of species delimitation in groups with recent and rapid radiation. Based on our results, we describe the new species B. ahtiana sp. nov., characterized by its bicolorous, caespitose, widely divergent thallus, conspicuously thickening main stems, well-developed secondary branches, and rather sparse third-order branchlets. Another new lineage, referred to here as B. tenuis s. lat., is restricted to western North America and may represent a new species recently diverged from B. tenuis s. str., though further work is needed.
关键词	fungal barcode incomplete lineage sorting ITS regions lichen species delimitation SPECIES DELIMITATION PCR PRIMERS PARMELIACEAE ASCOMYCOTA DNA EVOLUTION TAXONOMY LICHENS USNEA LECANORALES
DOI	10.1017/S0024282923000555
收录类别	SCI
WOS记录号	WOS:001113548300001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75589
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Myllys,Leena,Pino-Bodas,Raquel,Velmala,Saara,et al. Multi-locus phylogeny of Bryoria reveals recent diversification and unexpected diversity in section Divaricatae[J]. LICHENOLOGIST,2023.
APA	Myllys,Leena,Pino-Bodas,Raquel,Velmala,Saara,Wang,Li-Song,&Goward,Trevor.(2023).Multi-locus phylogeny of Bryoria reveals recent diversification and unexpected diversity in section Divaricatae.LICHENOLOGIST.
MLA	Myllys,Leena,et al."Multi-locus phylogeny of Bryoria reveals recent diversification and unexpected diversity in section Divaricatae".LICHENOLOGIST (2023).

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