Abstract Detail

Systematics Section/ASPT

Lee, Chunghee [1], Chung, Jae Min [1], Kim, Seon-Hee [2], Kim, Seung-Chul [2].

Phylogeny and biogeography of genus Forsythia (Forsythieae; Oleaceae).

The genus Forsythia comprises of 13 species and is restricted to the temperate region of Eurasia, especially northeastern Asia and eastern Europe. It represents one of the most popular shrubby spring flowers and many wild species and several cultivars are widely cultivated in this region. All but one species, F. europaea, occur in east Asia and the northeastern Asia is considered as the center of diversity. Despite of its horticultural importance, very little is known about phylogenetic relationships among wild species within the genus. In addition, the delimitation of several species is controversial due to highly variable vegetative and reproductive characters. In this study, we sampled a total of 17 taxa including the monotypic genus Abelliophyllum as ingroup and one outgroup genus Fontanesia, representing the first study including all but one wild species with multiple populations. A total of 86 accessions were sequenced for both nuclear ITS and four chloroplast noncoding regions (rps16-trnQ, rpl32-trnL, rpl32-ndhF, and psbJ-petA). For phylogenetic analysis, we conducted maximum parsimony (MP), maximum likelihood (ML), and Bayesian Inference (BI) analyses. Furthermore, molecular dating using BEAST program was performed to estimate the age of genus Forsythia and major lineages within the genus. The ITS phylogeny suggests that Abelliophyllum and Forsythia are reciprocally monophyletic and three major lineages were identified in genus Forsythia. Non-monophyly of several species is apparent, warranting further taxonomic studies. The cpDNA phylogeny based on four combined regions found four major lineages within the genus. Major lineages found in nuclear and chloroplast DNA phylogenies correspond to their vegetative (leaf shape and degree of hairiness) and floral (flower color, degree of floral tube dissection, and sepal structure) morphology. The molecular dating suggests that the crown age of Forsythieae (Forsythia and Abelliophyllum) is 13. 2 Mya (mid Miocene) and major lineages of Forsythia were diversified during late Miocene and early Pliocene.

Broader Impacts:

1 - Korea National Arboretum, Pocheon, Gyeong-Gi, 487-821, Korea
2 - Sungkyunkwan University, Biological Sciences, 2066 Seobu-ro, Suwon, Gyeonggi Do, N/A, 440-746, Korea

Keywords:
Forsythia
Abelliophyllum
disjunct distribution
molecular phylogeny
molecular dating.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PSY048
Abstract ID:509
Candidate for Awards:None