Long-fragment targeted capture for long-read sequencing of plastomes.
APPLICATIONS IN PLANT SCIENCES(2019)
摘要
Premise Third-generation sequencing methods generate significantly longer reads than those produced using alternative sequencing methods. This provides increased possibilities for the study of biodiversity, phylogeography, and population genetics. We developed a protocol for in-solution enrichment hybridization capture of long DNA fragments applicable to complete plastid genomes. Methods and Results The protocol uses cost-effective in-house probes developed via long-range PCR and was used in six non-model monocot species (Poaceae: African rice, pearl millet, fonio; and three palm species). DNA was extracted from fresh and silica gel-dried leaves. Our protocol successfully captured long-read plastome fragments (3151 bp median on average), with an enrichment rate ranging from 15% to 98%. DNA extracted from silica gel-dried leaves led to low-quality plastome assemblies when compared to DNA extracted from fresh tissue. Conclusions Our protocol could also be generalized to capture long sequences from specific nuclear fragments.
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关键词
de novo assembly,DNA probes,long-range PCR,MinION,whole plastome sequencing
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