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Abstract
Chicory (Cichorium intybus L.) root is the main raw material used for inulin production, and chicory leaf represents an important forage resource. This is the first reported sequence for a chloroplast genome of the chicory family Compositae. The length of the intact chicory chloroplast genome was 152,975 bp, consisting of one reverse repeat region (IRs, 50,038 bp), one small single-copy region (SSC, 18,561 bp), and one large single-copy region (LSC, 84,376 bp). The chicory chloroplast genome contains 127 functional genes, including 74 protein-coding genes, 29 tRNA genes, and 24 rRNA genes. An analysis of the phylogenetic relationship of chicory to other species revealed that chicory is closely related to the Chrysanthemum and Artemisia groups. Together these results serve to lay a foundation for the ongoing evolutionary and ecological study of Cichorium.
Disclosure statement
The authors declare no conflicts of interest and are responsible for the content.
Figure 1. Neighbour-joining phylogenetic tree of Cichorium intybus based on 14 complete chloroplast genome sequences using Nicotiana tabacum as an out-group. Numbers in the nodes are bootstrap values based on 1000 replicates. Accession numbers are listed as below: Helianthus_tuberosus MG_696658, Helianthus_annuus NC_007977, Lactuca sativa NC_007578, Cynara cardunculus KM_035764, Ageratina_adenophora NC_015621, Chrysanthemum boreale MG_913594.1, Artemisia frigida NC_020607, Cynara cardunculus KM_035764, Carthamus tinctorius KX_822074, Pericallis_hybrida KT_285537, Jacobaea vulgaris NC_015543, Abies sibirica NC_035067, Taraxacum mongolicum NC_031396, and Nicotiana tabacum NC_001879.
