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Systematics of Gagea and Lloydia (Liliaceae) and infrageneric classification of Gagea based on molecular and
Angela Peterson1, Igor G Levichev, Jens Peterson
1Martin-Luther-University of Halle/Wittenberg, Biozentrum, Weinbergweg 22, D-06120 Halle/Saale, Germany. angela.peterson@biozentrum.uni-halle.de
Abstract:
Our study represents the first phylogenetic analyses of the genus Gagea Salisb. (Liliaceae), including 58 species of Gagea and 6 species of the closely related genus Lloydia Salisb. ex Rchb. Our molecular results support the infrageneric classification of the genus Gagea in sections according to Levichev and demonstrate that Pascher's subdivision of this genus into two subgenera can no longer be upheld. Certain Gagea sections (e.g., Gagea, Minimae, and Plecostigma) are well supported by cpDNA and nrDNA data. Gagea sect. Fistulosae is closely related to G. sect. Didymobolbos. Gagea sect. Graminifoliae and G. sect. Incrustatae are closely related to G. sect Platyspermum. The analyses support the monophyly of Gagea and Lloydia collectively. The molecular analyses reveal the basal position of G. graeca in proportion to all other species of Gagea and Lloydia investigated. Minor morphological differences could be established between both genera which support their close relationship.
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