Abstract:
Information on genetic diversity and its relationship is fundamental for
the preservation and improvement of orchid germplasm. For Dendrobium, such
information, particularly by a meta-analysis, was limited. The study aimed to
assess the genetic diversity and relationships of Dendrobium germplasm based on
bioactive compounds, their biological activities, and plant organs by a meta-analysis approach. A total of 51 species of Dendrobium have been collected and
identified as producing bioactive compounds, including their biological activities
and plant organs (parts). In this case, the highest genetic diversity was shown by
polyphenols (H' index = 0.90) as substances, neuroprotective (H' = 0.80) for
activity, and the leaf organ with an H' index of 0.89. The UPGMA analysis showed
that Dendrobium grouped into seven clusters, where the furthest relationship was
presented by D. moschatum and D. catenatum. However, the closest relation was
by D. scabrilingue with D. delacourii, including D. snowflake and D. ovatum.
Following these parameters, Dendrobium shows unique genetic diversity and
relationships. Thus, it is valuable for future preservation and improvement
programs of Dendrobium.
