The large single-copy (LSC) region functions as a highly effective and efficient molecular marker for accurate authentication of medicinal Dendrobium species.

ABSTRACT: Having great medicinal values, Dendrobium species of "Fengdou" (DSFs) are a taxonomically complex group in Dendrobium genus including many closely related and recently diverged species. Traditionally used DNA markers have been proved to be insufficient in authenticating many species of this group. Here, we investigated 101 complete plastomes from 23 DSFs, comprising 72 newly sequenced and 29 documented, which all exhibited well-conserved genomic organization and gene order. Plastome-wide comparison showed the co-occurrence of single nucleotide polymorphisms (SNPs) and insertions/deletions (indels), which can be explained by both the repeat-associated and indel-associated mutation hypotheses. Moreover, guanine-cytosine (GC) content was found to be negatively correlated with th

SUBMITTER: Li L 

PROVIDER: S-EPMC7606094 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature