Phylogeny and Molecular Evolution of Tricyrtis (Liliaceae s.l.) Inferred from Plastid DNA matK Spacer Nucleotide Sequences

Abstract

Phylogenetic relationships of the genus Tricyrtis (Liliaceae s.l.) have been investigated using data from two non-coding plastid DNA nucleotide sequences using a classical parsimony-based approach in order to provide ground work for further Bayesian inference research. Parsimony-based studies do not involve temporal and spatial information unlike MCMC (Markov chain Monte Carlo) methods. However, well-established phylogeny and age calibration information play vital roles in estimation of molecular evolutionary rate and divergence times in lineages. The evolutionary rate estimates from the matK spacer in Tricyrtis lineages were similar to those in our previous report on rps16 intron data. In the near future different evolutionary model systems will be tested in order to clarify evolutionary rate estimations in various flowering plants including medicinal herbs.

1089. Tricyrtis ohsumiensis Masam.: Liliaceae

“…Since its description in 1930, T. ohsumiensis has remained unchanged in its taxonomic position as a member of sect. Flavae , with the most recent phylogenetic studies showing both strong support for its placement within this section as well as strong support for the monophyly of this clade (Masamune, 1930; Takahashi, 1980; Tanaka, 2012; Hong & Jury, 2011; Hong & Jury, 2012). Morphologically species within this section are characterised by an absence of stolons, lack of adaxially impressed or abaxially raised veins of the leaves, nearly homomorphic outer and inner tepals with a corniculate or apiculate apex and with unlobed ‘uni‐saccate’ nectariferous sacs (Figure 1) (Masamune, 1930; Tanaka, 2010).…”

“…for the monophyly of this clade (Masamune, 1930;Takahashi, 1980;Tanaka, 2012;Hong & Jury, 2011;Hong & Jury, 2012). Morphologically species within this section are characterised by an absence of stolons, lack of adaxially impressed or abaxially raised veins of the leaves, nearly homomorphic outer and inner tepals with a corniculate or apiculate apex and with unlobed 'uni-saccate' nectariferous sacs (Figure 1) (Masamune, 1930;Tanaka, 2010).…”

Complete chloroplast genome of Tricyrtis xianjuensis Li, Chen & Ma 2014 (Liliaceae): a species endemic to Zhejiang province, China

“… 2018 ) is 155,778 bp, merely 22 bp longer than that of T. xianjuensis . However, compared to matK gene and rps16 intron, which were previously used for phylogenetic and evolutionary analyses of Tricyrtis species, the chloroplast genome offers a greater number of variable sites (Sophia and Jury 2012 ).…”

“…The genus Tricyrtis , classified within family Liliaceae, is a small-sized group comprising approximately 18 species, and they are predominantly distributed from Himalayas to East Asia (Wu et al. 2000 ; Sophia and Jury 2012 ). There are about 10 Tricyrtis species distributed in China, including T. macropoda Miq 1867, T. pilosa Wall.…”

1055. Tricyrtis lasiocarpa Matsumura: Liliaceae

“…Hirtae despite T. formosana var. amethystina being widely accepted as a synonym of T. lasiocarpa (Hong et al, 2012). There is clearly much more research to be done on the infrageneric classification of this genus in order to clarify these internal relationships.…”