Characterization of complete chloroplast genome of <i>Amentotaxus yunnanensis</i> (Taxaceae), a species with extremely small populations in China

Torreya nucifera (L.) Siebold & Zucc. (Taxaceae) is a tertiary relict tree species with a distribution that is limited to South Korea and Japan. In the present study, the complete chloroplast (cp) genome of T. nucifera was sequenced and analyzed. The genome was 136,985 bp in length and contained 118 genes, including 82 protein-coding genes, 33 tRNA genes, and 4 rRNA genes. Fifteen of the genes contained a single intron, whereas ycf3 contained two introns and there were no inverted repeat sequences in the genome. Phylogenetic analysis supported the monophyly of Torreya species within the Taxaceae and T. nucifera was closely related to its congener T. grandis.

supporting

confidence: 76%

The complete chloroplast genome of Torreya nucifera (Taxaceae) and phylogenetic analysis

Shin

Kim

Hong

et al. 2019

“…Similar to other conifers, the studied species does not contain inverted repeat regions (IRs) (Ge et al. 2019 ). The total GC content was 35.1%.…”

mentioning

confidence: 94%

The complete chloroplast genome of Cephalotaxus lanceolata (Taxaceae), a plant species with extremely small populations

Xiong

Luo

2021

Self Cite

Cephalotaxus lanceolata K. M. Feng ex C. Y. Cheng W. C. Cheng and L. K. Fu (Taxaceae) is a threatened plant species and a typical plant species with extremely small populations (PSESP) with only four individuals found in Gaoligong Mountain. With the aim of providing data for future conservation efforts, we sequenced the whole chloroplast (cp) genome of C. lanceolata. The results showed that the plastid genome is 136,404 bp in size. In total, 116 unique genes were annotated, including 83 protein-coding genes, 29 tRNA genes, and 4 rRNA genes. The total GC content was 35.1%. We performed phylogenetic analyses based on 12 cp genomes of Taxaceae, and we determined that the genus Cephalotaxus forms a sister group to Taxus and Pseudotaxus .

“… 2018 ; Ge et al. 2019 ; Shin et al. 2019 ), with the loss of one copy of the inverted repeats (IRs).…”

mentioning

confidence: 99%

The complete chloroplast genome of Torreya parvifolia, a species with extremely small population in China

Zhang

Mao

Qian

et al. 2021

Torreya parvifolia ( Torreya , Taxaceae) is endemic in Sichuan, China. It consisted of an extremely small population with less than 100 wild individuals. In this study, the complete chloroplast genome of T. parvifolia was assembled using the Illumina data. The complete chloroplast genome of T. parvifolia is 137,106 bp in length. The genome consists of 119 genes in total, including 82 protein-coding genes (PCGs), 4 ribosomal RNA (rRNA) genes, and 33 transfer RNA (tRNA) genes. Phylogenetic analysis indicated that T. parvifolia was closely related to T. fargesii , T. nucifera , and T. fargesii var. yunnanensis with strong support.