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- W2890135531 abstract "<ns5:p><ns5:bold>Background:</ns5:bold>The chloroplast (cp) genome is an important resource for studying plant diversity and phylogeny. Assembly of the cp genomes from next-generation sequencing data is complicated by the presence of two large inverted repeats contained in the cp DNA.</ns5:p><ns5:p><ns5:bold>Methods:</ns5:bold>We constructed a complete circular cp genome assembly for the hexaploid sweetpotato using extremely low coverage (<1×) Oxford Nanopore whole-genome sequencing (WGS) data coupled with Illumina sequencing data for polishing.</ns5:p><ns5:p><ns5:bold>Results:</ns5:bold>The sweetpotato cp genome of 161,274 bp contains 152 genes, of which there are 96 protein coding genes, 8 rRNA genes and 48 tRNA genes. Using the cp genome assembly as a reference, we constructed complete cp genome assemblies for a further 17 sweetpotato cultivars from East Africa and an<ns5:italic>I. triloba</ns5:italic>line using Illumina WGS data. Analysis of the sweetpotato cp genomes demonstrated the presence of two distinct subpopulations in East Africa. Phylogenetic analysis of the cp genomes of the species from the Convolvulaceae<ns5:italic>Ipomoea</ns5:italic>section<ns5:italic>Batatas</ns5:italic>revealed that the most closely related diploid wild species of the hexaploid sweetpotato is<ns5:italic>I. trifida</ns5:italic>.</ns5:p><ns5:p><ns5:bold>Conclusions:</ns5:bold>Nanopore long reads are helpful in construction of cp genome assemblies, especially in solving the two long inverted repeats. We are generally able to extract cp sequences from WGS data of sufficiently high coverage for assembly of cp genomes. The cp genomes can be used to investigate the population structure and the phylogenetic relationship for the sweetpotato.</ns5:p>" @default.
- W2890135531 created "2018-09-27" @default.
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- W2890135531 date "2020-07-21" @default.
- W2890135531 modified "2023-10-16" @default.
- W2890135531 title "Insights into population structure of East African sweetpotato cultivars from hybrid assembly of chloroplast genomes" @default.
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- W2890135531 doi "https://doi.org/10.12688/gatesopenres.12856.2" @default.
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