Abstract Detail



Systematics

Chung, Kyong-Sook [1].

Phylogeny of Carex sect. Phleoideae (Cyperaceae).

Carex sect. Phleoideae Meinsh. (subgenus Vignea, Cyperaceae) occurs in East, South, and Southeastern Asia with about ten specie. The section is characterized by short rhizomes, unbranched and bisexual spikes (androgynous) with 2 stigmas, and veined small perigynia (less than 7 mm long). To test the monophyly of the section and clarify phylogenetic relationships among taxa in the section, nrDNA (ITS and ETS) and cpDNA (trnC-ycf6, trnL-F, rpL16, and atpB-rbcL IGS) data are analyzed covering all the taxa with morphological variations and geographic distribution areas. The monophyly of the section is supported in all the data sets, and within the section at least three clades are formed. However, compositions of each clade and topology vary depending on data sets. C. nuerocarpa exhibits monophyletic with high supports in all the data sets and placed in derived groups. Although wide geographic distribution areas of the taxon, winged perigynia and leafy long bracts distinguish the taxon from the others in the section. C. paxii is placed in the basal in the section. The taxon usually grow in small populations and is very rare in all the distribution areas. C. leiorhyncha forms exclusive clades, whereas C. lasvissma is nested with C. nubigena complex. To clarify C. nubigena complex (C. nubigena subsp. alba, C. nubigena subsp. pseudoarenicola, and C. nubigena var. franchetiana), further discussion will be made at the presentation. Detailed perigynium morphology and cytological information in the section will be interpreted in a phylogenetic framework.


1 - Jungwon University, 85 Munmuro, Goesan, Chungbuk, 28024, Korea

Keywords:
Cyperaceae
sect. Phleoideae
Carex.

Presentation Type: Oral Paper
Number:
Abstract ID:659
Candidate for Awards:None


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