Abstract:
BACKGROUND:Paired-tag sequencing approaches are commonly used for the analysis of genome structure. However, mammalian genomes have a complex organization with a variety of repetitive elements that complicate comprehensive genome-wide analyses. RESULTS:Here, we systematically assessed the utility of paired-end and mate-pair (MP) next-generation sequencing libraries with insert sizes ranging from 170 bp to 25 kb, for genome coverage and for improving scaffolding of a mammalian genome (Rattus norvegicus). Despite a lower library complexity, large insert MP libraries (20 or 25 kb) provided very high physical genome coverage and were found to efficiently span repeat elements in the genome. Medium-sized (5, 8 or 15 kb) MP libraries were much more efficient for genome structure analysis than the more commonly used shorter insert paired-end and 3 kb MP libraries. Furthermore, the combination of medium- and large insert libraries resulted in a 3-fold increase in N50 in scaffolding processes. Finally, we show that our data can be used to evaluate and improve contig order and orientation in the current rat reference genome assembly. CONCLUSIONS:We conclude that applying combinations of mate-pair libraries with insert sizes that match the distributions of repetitive elements improves contig scaffolding and can contribute to the finishing of draft genomes.
journal_name
BMC Genomicsjournal_title
BMC genomicsauthors
van Heesch S,Kloosterman WP,Lansu N,Ruzius FP,Levandowsky E,Lee CC,Zhou S,Goldstein S,Schwartz DC,Harkins TT,Guryev V,Cuppen Edoi
10.1186/1471-2164-14-257subject
Has Abstractpub_date
2013-04-16 00:00:00pages
257issn
1471-2164pii
1471-2164-14-257journal_volume
14pub_type
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