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Phylogenetic marker development for target enrichment from transcriptome and genome skim data: the pipeline and its application in southern African Oxalis (Oxalidaceae)

By vojta , 26 November 2015

Phylogenetics benefits from using a large number of putatively independent nuclear loci and their combination with other sources of information, such as the plastid and mitochondrial genomes. To facilitate the selection of orthologous low-copy nuclear (LCN) loci for phylogenetics in non-model organisms, we created an automated and interactive script to select hundreds of LCN loci by a comparison between transcriptome and genome skim data. We used our script to obtain LCN genes for southern African Oxalis (Oxalidaceae), a speciose plant lineage in the Greater Cape Floristic Region. This resulted in 1,164 LCN genes greater than 600 bp. Using target enrichment combined with genome skimming (Hyb-Seq) we obtained on average 1,141 LCN loci, nearly the whole plastid genome and the nrDNA cistron from 23 southern African Oxalis species. Despite a wide range of gene trees, the phylogeny based on the LCN genes was very robust, as retrieved through various gene and species tree reconstruction methods as well as concatenation. Cytonuclear discordance was strong. This indicates that organellar phylogenies alone are unlikely to represent the species tree and stresses the utility of Hyb-Seq in phylogenetics. https://onlinelibrary.wiley.com/doi/abs/10.1111/1755-0998.12487 and https://github.com/V-Z/sondovac/

Články
Bioinformatics
Phylogeny
HybSeq
Linux (and another software)
Oxalis
Faculty of Science, Charles University
Taxonomy
Science, research, biology
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This work by Vojtěch Zeisek is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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