Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul
Abstract Background Several bioinformatics tools have been designed for assembly and annotation of chloroplast (cp) genomes, making it difficult to decide which is most useful and applicable to a specific case. The increasing number of plant genomes provide an opportunity to accurately obtain cp gen...
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2019-11-01
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| Series: | BMC Genomics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12864-019-6253-5 |
| _version_ | 1828812509697540096 |
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| author | Kadriye Kahraman Stuart James Lucas |
| author_facet | Kadriye Kahraman Stuart James Lucas |
| author_sort | Kadriye Kahraman |
| collection | DOAJ |
| description | Abstract Background Several bioinformatics tools have been designed for assembly and annotation of chloroplast (cp) genomes, making it difficult to decide which is most useful and applicable to a specific case. The increasing number of plant genomes provide an opportunity to accurately obtain cp genomes from whole genome shotgun (WGS) sequences. Due to the limited genetic information available for European hazelnut (Corylus avellana L.) and as part of a genome sequencing project, we analyzed the complete chloroplast genome of the cultivar ‘Tombul’ with multiple annotation tools. Results Three different annotation strategies were tested, and the complete cp genome of C. avellana cv Tombul was constructed, which was 161,667 bp in length, and had a typical quadripartite structure. A large single copy (LSC) region of 90,198 bp and a small single copy (SSC) region of 18,733 bp were separated by a pair of inverted repeat (IR) regions of 26,368 bp. In total, 125 predicted functional genes were annotated, including 76 protein-coding, 25 tRNA, and 4 rRNA unique genes. Comparative genomics indicated that the cp genome sequences were relatively highly conserved in species belonging to the same order. However, there were still some variations, especially in intergenic regions, that could be used as molecular markers for analyses of phylogeny and plant identification. Simple sequence repeat (SSR) analysis showed that there were 83 SSRs in the cp genome of cv Tombul. Phylogenetic analysis suggested that C. avellana cv Tombul had a close affinity to the sister group of C. fargesii and C. chinensis, and then a closer evolutionary relationship with Betulaceae family than other species of Fagales. Conclusion In this study, the complete cp genome of Corylus avellana cv Tombul, the most widely cultivated variety in Turkey, was obtained and annotated, and additionally phylogenetic relationships were predicted among Fagales species. Our results suggest a very accurate assembly of chloroplast genome from next generation whole genome shotgun (WGS) sequences. Enhancement of taxon sampling in Corylus species provide genomic insights into phylogenetic analyses. The nucleotide sequences of cv Tombul cp genomes can provide comprehensive genetic insight into the evolution of genus Corylus. |
| first_indexed | 2024-12-12T09:45:16Z |
| format | Article |
| id | doaj.art-b9a449361363486e90241e049dd58718 |
| institution | Directory Open Access Journal |
| issn | 1471-2164 |
| language | English |
| last_indexed | 2024-12-12T09:45:16Z |
| publishDate | 2019-11-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Genomics |
| spelling | doaj.art-b9a449361363486e90241e049dd587182022-12-22T00:28:25ZengBMCBMC Genomics1471-21642019-11-0120111210.1186/s12864-019-6253-5Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv TombulKadriye Kahraman0Stuart James Lucas1Faculty of Engineering and Natural Sciences, Sabanci UniversitySabanci University Nanotechnology Research and Application Centre (SUNUM), Sabanci UniversityAbstract Background Several bioinformatics tools have been designed for assembly and annotation of chloroplast (cp) genomes, making it difficult to decide which is most useful and applicable to a specific case. The increasing number of plant genomes provide an opportunity to accurately obtain cp genomes from whole genome shotgun (WGS) sequences. Due to the limited genetic information available for European hazelnut (Corylus avellana L.) and as part of a genome sequencing project, we analyzed the complete chloroplast genome of the cultivar ‘Tombul’ with multiple annotation tools. Results Three different annotation strategies were tested, and the complete cp genome of C. avellana cv Tombul was constructed, which was 161,667 bp in length, and had a typical quadripartite structure. A large single copy (LSC) region of 90,198 bp and a small single copy (SSC) region of 18,733 bp were separated by a pair of inverted repeat (IR) regions of 26,368 bp. In total, 125 predicted functional genes were annotated, including 76 protein-coding, 25 tRNA, and 4 rRNA unique genes. Comparative genomics indicated that the cp genome sequences were relatively highly conserved in species belonging to the same order. However, there were still some variations, especially in intergenic regions, that could be used as molecular markers for analyses of phylogeny and plant identification. Simple sequence repeat (SSR) analysis showed that there were 83 SSRs in the cp genome of cv Tombul. Phylogenetic analysis suggested that C. avellana cv Tombul had a close affinity to the sister group of C. fargesii and C. chinensis, and then a closer evolutionary relationship with Betulaceae family than other species of Fagales. Conclusion In this study, the complete cp genome of Corylus avellana cv Tombul, the most widely cultivated variety in Turkey, was obtained and annotated, and additionally phylogenetic relationships were predicted among Fagales species. Our results suggest a very accurate assembly of chloroplast genome from next generation whole genome shotgun (WGS) sequences. Enhancement of taxon sampling in Corylus species provide genomic insights into phylogenetic analyses. The nucleotide sequences of cv Tombul cp genomes can provide comprehensive genetic insight into the evolution of genus Corylus.http://link.springer.com/article/10.1186/s12864-019-6253-5Corylus avellanaTombul cultivarHazelnutChloroplast genomePhylogeny |
| spellingShingle | Kadriye Kahraman Stuart James Lucas Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul BMC Genomics Corylus avellana Tombul cultivar Hazelnut Chloroplast genome Phylogeny |
| title | Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul |
| title_full | Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul |
| title_fullStr | Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul |
| title_full_unstemmed | Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul |
| title_short | Comparison of different annotation tools for characterization of the complete chloroplast genome of Corylus avellana cv Tombul |
| title_sort | comparison of different annotation tools for characterization of the complete chloroplast genome of corylus avellana cv tombul |
| topic | Corylus avellana Tombul cultivar Hazelnut Chloroplast genome Phylogeny |
| url | http://link.springer.com/article/10.1186/s12864-019-6253-5 |
| work_keys_str_mv | AT kadriyekahraman comparisonofdifferentannotationtoolsforcharacterizationofthecompletechloroplastgenomeofcorylusavellanacvtombul AT stuartjameslucas comparisonofdifferentannotationtoolsforcharacterizationofthecompletechloroplastgenomeofcorylusavellanacvtombul |