De novo assembly of chloroplast genomes of Corchorus capsularis and C. olitorius yields species-spec

来源 :作物学报(英文版) | 被引量 : 0次 | 上传用户:yu555497
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Jute (Corchorus spp.) is a member of the Malvaceae family, which comprises more than 100 species. The systematic positions of jute species have remained unsettled. Chloroplasts are maternally inherited and their genomes are widely used for plant phylogenetic studies. In the present study, the chloroplast genomes of Corchorus capsularis and C. olitorius were assembled, with sizes of respectively 161,088 and 161,766 bp. Both genomes contained 112 unique genes (78 protein-coding, four rRNA, and 30 tRNA genes). Four regions with high variation between the two species were located in single-copy rather than inverted-repeat regions. A total of 66 simple sequence repeats (SSRs) were identified in the C. capsularis chloroplast genome and 56 in that of C. olitorius. Comparison of the two chloroplast genome sequences permitted the evaluation of nucleotide variation including 2417 single-nucleotide polymorphisms sites and 294 insertion or deletion sites, of which one marker (cpInDel 205) could discriminate the two jute species. Comparison of the C. capsularis and C. olitorius chloroplast genomes with those of other species in the Malvaceae revealed breakpoints in the accD locus, which is involved in fatty acid synthesis, in C. capsularis and C. olitorius. This finding suggests that genes from the chloroplast genome might have been transferred to the nuclear genome in some Corchorus species. This hypothesis was supported by synteny analysis of the accD region among the nuclear, chloroplast, and mitochondrial genomes. To our knowledge, this is the first report of the assembled chloroplast genome sequences of C. capsularis and C. olitorius. C. capsularis and C. olitorius are closely related to Gossypium species and there are abundant microstructure variations between these two genera. These results will expand our understanding of the systematics of species in the Malvaceae.
其他文献
As the end products of cellular regulatory processes, metabolites provide the link between genotypes and phenotypes. Although metabolites have been widely appli
Fusarium head blight (FHB) is one of the prevalent fungal diseases of wheat worldwide. Exploring new FHB resistance quantitative trait loci (QTL) in adapted whe