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      Youngiahangii (Asteraceae, Crepidinae), a new species from Hubei, China

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          Abstract

          Youngia hangii T.Deng, D.G.Zhang, Qun Liu & Z.M.Li, sp. nov., a new species of Asteraceae , is described and illustrated. It was collected in Wufeng County, Hubei Province, Eastern Central China. Youngia hangii is morphologically most similar to Y. rubida , but can be easily distinguished from the latter by capitula with 8–10 florets and the hairy leaf surface. Phylogenetic analyses, based on the internal transcribed spacers (ITS) and one chloroplast marker ( rps16), showed that Y. hangii and Y. rubida were sister species with good support. The results of both phylogenetic analysis and the morphological data support the specific rank of Y. hangii .

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          MrBayes 3.2: Efficient Bayesian Phylogenetic Inference and Model Choice Across a Large Model Space

          Since its introduction in 2001, MrBayes has grown in popularity as a software package for Bayesian phylogenetic inference using Markov chain Monte Carlo (MCMC) methods. With this note, we announce the release of version 3.2, a major upgrade to the latest official release presented in 2003. The new version provides convergence diagnostics and allows multiple analyses to be run in parallel with convergence progress monitored on the fly. The introduction of new proposals and automatic optimization of tuning parameters has improved convergence for many problems. The new version also sports significantly faster likelihood calculations through streaming single-instruction-multiple-data extensions (SSE) and support of the BEAGLE library, allowing likelihood calculations to be delegated to graphics processing units (GPUs) on compatible hardware. Speedup factors range from around 2 with SSE code to more than 50 with BEAGLE for codon problems. Checkpointing across all models allows long runs to be completed even when an analysis is prematurely terminated. New models include relaxed clocks, dating, model averaging across time-reversible substitution models, and support for hard, negative, and partial (backbone) tree constraints. Inference of species trees from gene trees is supported by full incorporation of the Bayesian estimation of species trees (BEST) algorithms. Marginal model likelihoods for Bayes factor tests can be estimated accurately across the entire model space using the stepping stone method. The new version provides more output options than previously, including samples of ancestral states, site rates, site d N /d S rations, branch rates, and node dates. A wide range of statistics on tree parameters can also be output for visualization in FigTree and compatible software.
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            Precision Farming: Technologies and Information as Risk-Reduction Tools

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              SequenceMatrix: concatenation software for the fast assembly of multi-gene datasets with character set and codon information

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                Author and article information

                Contributors
                Role: Formal analysisRole: Writing - original draftRole: Writing - review and editing
                Role: Formal analysis
                Role: Formal analysis
                Journal
                PhytoKeys
                PhytoKeys
                3
                urn:lsid:arphahub.com:pub:F7FCE910-8E78-573F-9C77-7788555F8AAD
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2021
                14 September 2021
                : 182
                : 27-38
                Affiliations
                [1 ] School of Life Sciences, Yunnan Normal University, Kunming 650092, Yunnan, China Yunnan Normal University Kunming China
                [2 ] Rare Plants Research Institute of Yangtze River, Three Gorges Corporation, Yichang 443133, Hubei, China Rare Plants Research Institute of Yangtze River Yichang China
                [3 ] College of Biology and Environmental Sciences, Jishou University, Jishou 416000, Hunan, China Jishou University Jishou China
                [4 ] CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China Kunming Institute of Botany, Chinese Academy of Sciences Kunming China
                Author notes
                Corresponding authors: Tao Deng ( dengtao@ 123456mail.kib.ac.cn ), Zhi-Min Li ( lizhimin_vip@ 123456163.com )

                Academic editor: Alexander Sennikov

                Article
                71063
                10.3897/phytokeys.182.71063
                8455504
                Qun Liu, Gui-Yun Huang, Dai-Gui Zhang, Jian-Wen Zhang, Tao Deng, Zhi-Min Li

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Categories
                Research Article
                Asteraceae
                Taxonomy
                Asia
                Central Asia

                Plant science & Botany

                crepidinae , hubei, molecular phylogeny, morphology, new species, youngia

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