Journal
PLANT BIOSYSTEMS
Volume 147, Issue 3, Pages 788-799Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/11263504.2013.829880
Keywords
Allozymes; genetic variability; Italy; morphology; Pilosella; taxonomic relationships
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Funding
- International Foundation pro Herbario Mediterraneo
- Universita degli Studi di Palermo (Fondi di Ateneo per la Ricerca)
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Morphological variation, ploidy level and genetic diversity have been studied on 10 populations of the Pilosella hoppeana aggr. from the Alps, Abruzzo, Calabria and Sicily. Chromosome counts showed that the plants from Abruzzo and those from Sicily are tetraploid (2n=36); they are assigned to P. hoppeana subsp. macrantha. The plants from the Alps (P. hoppeana subsp. hoppeana) and those from Calabria are diploid. The Calabrian populations, previously included in P. hoppeana subsp. macrantha, are shown to belong to a separate species, P. leucopsilon. The principal component analysis, based on 25 morphological characters, allowed distinguishing clearly four groups. An allozyme study using 10 enzyme systems revealed 7 polymorphic loci with a total of 20 alleles, some of them exclusive at regional level, others shared between populations showing similar morphological features. The genetic differentiation between populations was relatively high. The obtained dendrogram supports recognition of the morphologically defined taxa.
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