The complete chloroplast genome of horned holly, Ilex cornuta Lindl. & Paxton (Aquifoliaceae)

Abstract

Ilex cornuta Lindl. & Paxton is a species distributed in eastern China and Korea, utilized as traditional medical plants as well as horticultural species. Here, we completed chloroplast genome of I. cornuta. Its length is 157,224 bp long and has four subregions: 86,610 bp of large single copy (LSC) and 18,429 bp of small single copy (SSC) regions are separated by 26,092 bp of inverted repeat (IR) regions including 131 genes (86 protein-coding genes, eight rRNAs, and 37 tRNAs). The overall GC content of this chloroplast genome is 37.7% and those in the LSC, SSC, and IR regions are 35.7%, 31.9%, and 42.9%, respectively. Phylogenetic trees show that I. cornuta is clustered in Section Ilex clade clearly. In addition, two Ilex species from South America are not in a basal clade, which is different from previous phylogenetic study, suggesting more Ilex chloroplast genomes are required to understand phylogenetic relationships of Ilex species.

Comparative analysis of the complete chloroplast genome among Prunus mume, P. armeniaca, and P. salicina

“…Guisinger and Weng 36,37 found that repetitive sequences might play an important role in chloroplast genome arrangement and sequence variation. In this study, we found a large number of repetitive sequences in the chloroplast genomes of P. mume , P. salicina , and P. armeniaca , especially in the intergenic region, which is consistent with the results of studies on the chloroplast genomes of Quercus 38 and Holly 39,40 . These repetitive sequences can be used as important resources for studying differences in chloroplast genes.…”

The complete chloroplast genome of Ilex ‘Tall Boy’, Ilex aquifolium × Ilex latifolia (Aquifoliaceae)

“… 2017 ; Park et al. 2019 ). A phylogenetic tree was constructed based on the complete cp genome of ‘Tall Boy’ and other reference genomes.…”

The complete chloroplast genome of Ilex ‘Emily Bruner’, Ilex cornuta ‘Burfordii’ × Ilex latifolia (Aquifoliaceae)

“… 2017 ; Park et al. 2019 ). To reveal the phylogenetic position of ‘Emily Bruner’ with these members, a phylogenetic analysis was performed based on 10 complete cp genomes, and one taxa from Helwingia was served as outgroup.…”

“…In a previous study, 10 cp genomes of Ilex were completed, which including the parents of 'Emily Bruner' (Yao et al 2016;Cascales et al 2017;Park et al 2019). To reveal the phylogenetic position of 'Emily Bruner' with these members, a phylogenetic analysis was performed based on 10 complete cp genomes, and one taxa from Helwingia was served as outgroup.…”