Abstract
Zicaitai (Brassica rapa var. purpuraria (L.H.Bailey) Kitam 1950) is a vegetable crop that boasts a high nutritional value and unique flavor. It originated from Central China and was formed after long-term cultivation and domestication. In this study, we obtained the complete sequence of the chloroplast genome of zicaitai, a circular molecule of 153,483 bp in length. This chloroplast genome consists of a large single-copy (LSC) region (83,282 bp), a small single-copy (SSC) region (17,775 bp), and a pair of inverted repeats (IRs) (26,213 bp). By sequence annotation, 132 genes, including 87 protein-coding genes, 37 tRNA genes, and eight rRNA genes were identified in the zicaitai chloroplast. A total of 315 simple sequence repeats (SSRs) were found located in LSC (197), SSC (72), and IR (46), respectively. Phylogenetic analysis based on chloroplast genomes indicated the relationship of zicaitai and the Brassicaceae family, which supports zicaitai as a variety of B. rapa in taxonomy. The results obtained in this study provide insight into further research on Brassica chloroplasts and their phylogeny.
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