Abstract Detail

Systematics Section/ASPT

Kim, Jungsung [1], Hong, Jeong-Ki  [2], Chase, Mark W. [3], Fay, Michael F. [3], Kim, Joo-Hwan [1].

Molecular phylogeneticrelationship of Liliales based on the data of four plastid loci, matK, rbcL, atpB and atpF-H.

Many molecular studies have shown that the monocot order Liliales are well supported; morphologically they are defined by synapomorphies of tepalar nectaries and extrorse anthers, in contrast to septal nectaries and introrse anthers commonly found in other monocots, especially Asparagales with which they were often confused in the past. They are composed of approximately 1,500 species, 67genera and 9-11 families. Although monophyly is clear, phylogenetic relationships among some families are still unclear. In this study, we examine inter- and infra-familial relationships among Liliales with analyses based on four plastid loci, rbcL, matK, atpB and atpF-H. We produced both maximum parsimony and Bayesian trees for 10 families, 49 genera and 147 taxa of Liliales sensu APG III using combined data. Liliales, except Corsiaceae (Arachnitis) were again strongly supported in both results. Campynemataceae were sister to the rest of the order, which fell in two well-defined clades of (Colchicaceae (Alstroemeriaceae including Luzuriagaceae) and (Liliaceae, Smilacaceae, (Rhipogonaceae + Philesiaceae)) and one weakly supported clade of Melanthiaceae plus Petermanniaceae. Subfamilial/tribal circumscriptions of the three larger families, Colchicaceae, Melanthiaceae and Liliaceae were well defined except Calochortoideae (Liliaceae); Calochortus and Tricyrtis were not sister taxa. In addition, we found several taxa with a small inversion composed of 10bp in matK, which could contribute additional homoplasy to these analyses if included without re-coding. Placement of Corsiaceae with plastid data was problematic. Based on these results, reconsideration of circumscription of Rhipogonaceae + Philesiaceae and subfamilial circumscription for Calochortoideae are suggested.

Broader Impacts:

1 - Gachon University, Dept Of Life Science, 1342 Seongnam-daero, Bokjeong-dong, Sujeong-gu, Seongnam, Gyeonggi-do, N/A, 461-701, Korea
2 - Korea National Aboretum, Pochon, Gyeonggi-do, 487-821, Korea
3 - Royal Botanic Gardens - Kew, Jodrell Laboratory, Kew Road, Richmond, TW9 3DS, United Kingdom

Keywords:
Liliales
Molecular phylogeny
Familial relationships.

Presentation Type: Oral Paper:Papers for Sections
Session: 38
Location: Delaware B/Hyatt
Date: Tuesday, July 10th, 2012
Time: 1:45 PM
Number: 38002
Abstract ID:417