The biosystematics of Jacobaea maritima (L.) Pelser & Meijden and four closely related taxa in the CentralMediterranean area has been studied. Nine representative populations of five taxa (J. maritima subsp. maritima,subsp. bicolor, subsp. gibbosa, J. ambigua subsp. ambigua and subsp. nebrodensis) were analysed. Molecularanalysis confirms close relationships among taxa (trnLEU and ITS II sequences are identical); ITS I and ISSRanalysis, on the other hand, shows some variability. Multivariate PCoA, based on 22 morphological variables,shows a gradient connecting all populations; a rather clear grouping of taxa is obtained, however, when thepopulation from Levanzo is excluded. Finally, a new subspecies, J. maritima subsp. sicula, is proposed.

A biosystematic study of the Jacobaea maritima group (Asteraceae, Senecioneae) in the Central Mediterranean area

PASSALACQUA, Nicodemo Giuseppe
;
PELLEGRINO, Giuseppe
2008

Abstract

The biosystematics of Jacobaea maritima (L.) Pelser & Meijden and four closely related taxa in the CentralMediterranean area has been studied. Nine representative populations of five taxa (J. maritima subsp. maritima,subsp. bicolor, subsp. gibbosa, J. ambigua subsp. ambigua and subsp. nebrodensis) were analysed. Molecularanalysis confirms close relationships among taxa (trnLEU and ITS II sequences are identical); ITS I and ISSRanalysis, on the other hand, shows some variability. Multivariate PCoA, based on 22 morphological variables,shows a gradient connecting all populations; a rather clear grouping of taxa is obtained, however, when thepopulation from Levanzo is excluded. Finally, a new subspecies, J. maritima subsp. sicula, is proposed.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11770/142166
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