A universal probe set for targeted sequencing of 353 nuclear genes from any flowering plant designed using k-medoids clustering
Authors
Johnson, Matthew G.Pokorny, Lisa
Dodsworth, Steven
Botigue, Laura R.
Cowan, Robyn S.
Devault, Alison
Eiserhardt, Wolf L.
Epitawalage, Niroshini
Forest, Felix
Kim, Jan T.
Leebens-Mack, James H.
Leitch, Ilia J.
Maurin, Olivier
Soltis, Douglas E.
Soltis, Pamela S.
Wong, Gane Ka-Shu
Wickett, Norman J.
Baker, William J.
Issue Date
2018-12-10
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Sequencing of target-enriched libraries is an efficient and cost-effective method for obtaining DNA sequence data from hundreds of nuclear loci for phylogeny reconstruction. Much of the cost of developing targeted sequencing approaches is associated with the generation of preliminary data needed for the identification of orthologous loci for probe design. In plants, identifying orthologous loci has proven difficult due to a large number of whole-genome duplication events, especially in the angiosperms (flowering plants).We used multiple sequence alignments from over 600 angiosperms for 353 putatively single-copy protein-coding genes identified by the One Thousand Plant Transcriptomes Initiative to design a set of targeted sequencing probes for phylogenetic studies of any angiosperm group. To maximize the phylogenetic potential of the probes, while minimizing the cost of production, we introduce a k-medoids clustering approach to identify the minimum number of sequences necessary to represent each coding sequence in the final probe set. Using this method, 5–15 representative sequences were selected per orthologous locus, representing the sequence diversity of angiosperms more efficiently than if probes were designed using available sequenced genomes alone. To test our approximately 80,000 probes, we hybridized libraries from 42 species spanning all higher-order groups of angiosperms, with a focus on taxa not present in the sequence alignments used to design the probes. Out of a possible 353 coding sequences, we recovered an average of 283 per species and at least 100 in all species. Differences among taxa in sequence recovery could not be explained by relatedness to the representative taxa selected for probe design, suggesting that there is no phylogenetic bias in the probe set. Our probe set, which targeted 260 kbp of coding sequence, achieved a median recovery of 137 kbp per taxon in coding regions, a maximum recovery of 250 kbp, and an additional median of 212 kbp per taxon in flanking non-coding regions across all species. These results suggest that the Angiosperms353 probe set described here is effective for any group of flowering plants and would be useful for phylogenetic studies from the species level to higher-order groups, including the entire angiosperm clade itself.Citation
Johnson MG, Pokorny L, Dodsworth S, Botigué LR, Cowan RS, Devault A, Eiserhardt WL, Epitawalage N, Forest F, Kim JT, Leebens-Mack JH, Leitch IJ, Maurin O, Soltis DE, Soltis PS, Ka-Shu Wong G Baker WJ, Wickett NJ (2019) 'A universal probe set for targeted sequencing of 353 nuclear genes from any flowering plant designed using k-medoids clustering', Systematic Biology, 68 (4), pp.594-606.Publisher
Oxford University Press (OUP)Journal
Systematic BiologyPubMed ID
30535394Additional Links
https://academic.oup.com/sysbio/article/68/4/594/5237557Type
ArticleLanguage
enISSN
1063-5157Sponsors
This work was supported by the Texas Tech University College of Arts and Sciences [to M.G.J.], the National Science Foundation [DEB-1239992, DEB-1342873 to N.J.W.], and by the Calleva Foundation, the Garfield Weston Foundation, and the Sackler Trust to the Royal Botanic Gardens, Kewae974a485f413a2113503eed53cd6c53
10.1093/sysbio/syy086
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- Creative Commons
Except where otherwise noted, this item's license is described as Yellow - can archive pre-print (ie pre-refereeing)
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