Chloroplast genome of an extremely endangered conifer Thuja sutchuenensis Franch.: gene organization, comparative and phylogenetic analysis.

ABSTRACT: Thuja sutchuenensis is a critically endangered tertiary relict species of Cupressaceae from southwestern China. We sequenced the complete chloroplast (cp) genome of T. sutchuenensis, showing the genome content of 129,776 bp, 118 unique genes including 82 unique protein-coding genes, 32 tRNA genes, and 4 rRNA genes. The genome structures, gene order, and GC content are similar to other typical gymnosperm cp genomes. Thirty-eight simple sequence repeats were identified in the T. sutchuenensis cp genome. We also found an apparent inversion between trnT and psbK between genera Thuja and Thujopsis. In addition, positive selection signals were detected in seven genes with high Ka/Ks ratios. The reconstructed phylogeny based on locall

SUBMITTER: Yu T 

PROVIDER: S-EPMC7078402 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature