Abstract：
:Data sets comprising small numbers of genetic markers are not always able to resolve phylogenetic relationships. This has frequently been the case in molecular systematic studies of plants, with many analyses being based on sequence data from only two or three chloroplast genes. An example of this comes from the riceflowers Pimelea Banks & Sol. ex Gaertn. (Thymelaeaceae), a large genus of flowering plants predominantly distributed in Australia. Despite the considerable morphological variation in the genus, low sequence divergence in chloroplast markers has led to the phylogeny of Pimelea remaining largely uncertain. In this study, we resolve the backbone of the phylogeny of Pimelea in comprehensive Bayesian and maximum-likelihood analyses of plastome sequences from 41 taxa. However, some relationships received only moderate to poor support, and the Pimelea clade contained extremely short internal branches. By using topology-clustering analyses, we demonstrate that conflicting phylogenetic signals can be found across the trees estimated from individual chloroplast protein-coding genes. A relaxed-clock dating analysis reveals that Pimelea arose in the mid-Miocene, with most divergences within the genus occurring during a subsequent rapid diversification. Our new phylogenetic estimate offers better resolution and is more strongly supported than previous estimates, providing a platform for future taxonomic revisions of both Pimelea and the broader subfamily. Our study has demonstrated the substantial improvements in phylogenetic resolution that can be achieved using plastome-scale data sets in plant molecular systematics.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Foster CSP,Henwood MJ,Ho SYWdoi
10.1016/j.ympev.2018.05.018subject
Has Abstractpub_date
2018-10-01 00:00:00pages
156-167eissn
1055-7903issn
1095-9513pii
S1055-7903(17)30744-3journal_volume
127pub_type
杂志文章abstract：:The Herpestidae are small terrestrial carnivores comprising 18 African and Asian genera, currently split into two subfamilies, the Herpestinae and the Galidiinae. The aim of this work was to resolve intra-familial relationships and to test the origin of sociality in the group. For this purpose we analysed sequences of...
journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
pub_type： 杂志文章
doi：10.1016/j.ympev.2012.10.012
更新日期：2013-02-01 00:00:00
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
pub_type： 杂志文章,评审
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journal_title：Molecular phylogenetics and evolution
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doi：10.1016/j.ympev.2013.09.011
更新日期：2014-01-01 00:00:00
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journal_title：Molecular phylogenetics and evolution
pub_type： 历史文章,杂志文章
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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