Abstract：
:Biodiversity analyses based on next-generation sequencing (NGS) platforms have developed by leaps and bounds in recent years. A PCR-free strategy, which can alleviate taxonomic bias, was considered as a promising approach to delivering reliable species compositions of targeted environments. The major impediment of such a method is the lack of appropriate mitochondrial DNA enrichment ways. Because mitochondrial genomes (mitogenomes) make up only a small proportion of total DNA, PCR-free methods will inevitably result in a huge excess of data (>99%). Furthermore, the massive volume of sequence data is highly demanding on computing resources. Here, we present a mitogenome enrichment pipeline via a gene capture chip that was designed by virtue of the mitogenome sequences of the 1000 Insect Transcriptome Evolution project (1KITE, www.1kite.org). A mock sample containing 49 species was used to evaluate the efficiency of the mitogenome capture method. We demonstrate that the proportion of mitochondrial DNA can be increased by approximately 100-fold (from the original 0.47% to 42.52%). Variation in phylogenetic distances of target taxa to the probe set could in principle result in bias in abundance. However, the frequencies of input taxa were largely maintained after capture (R(2) = 0.81). We suggest that our mitogenome capture approach coupled with PCR-free shotgun sequencing could provide ecological researchers an efficient NGS method to deliver reliable biodiversity assessment.
journal_name
Mol Ecol Resourjournal_title
Molecular ecology resourcesauthors
Liu S,Wang X,Xie L,Tan M,Li Z,Su X,Zhang H,Misof B,Kjer KM,Tang M,Niehuis O,Jiang H,Zhou Xdoi
10.1111/1755-0998.12472subject
Has Abstractpub_date
2016-03-01 00:00:00pages
470-9issue
2eissn
1755-098Xissn
1755-0998journal_volume
16pub_type
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