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The origin of a novel form of Senecio (Asteraceae) restricted to sand dunes in southern Sicily

The origin of a novel form of Senecio (Asteraceae) restricted to sand dunes in southern Sicily
The origin of a novel form of Senecio (Asteraceae) restricted to sand dunes in southern Sicily
•?The taxonomy of diploid Mediterranean Senecio sect. Senecio (Asteraceae) is complex, owing to a recent species radiation, high morphological plasticity and occasional interspecific hybridization.

•?A study was conducted to resolve the origin of a novel form of Senecio restricted to sand dunes in southern Sicily, Italy. This has been described previously as morphologically intermediate to Senecio gallicus and Senecio glaucus ssp. coronopifolius, indicating a possible hybrid origin, or as a variant of Senecio leucanthemifolius.

•?Plants of this form grown in a glasshouse were morphologically intermediate to S. glaucus and S. leucanthemifolius, but were also similar to some cultivated individuals of S. gallicus. No evidence for a hybrid origin was obtained from a survey of random amplified polymorphic DNA variation; instead the plants surveyed were most closely allied to Tunisian S. glaucus. They were also polymorphic for the same set of cpDNA haplotypes present in Tunisian S. glaucus.

•?We conclude that the Sicilian Senecio is a variant form of North African S. glaucus ssp. coronopifolius, which most probably dispersed to sand dunes in southern Sicily in the relatively recent past. The presence of several cpDNA haplotypes in this material indicates that there have been multiple introductions of the species to Sicily.
0028-646X
1051-1062
Chapman, M.A.
8bac4a92-bfa7-4c3c-af29-9af852ef6383
Abbott, R.J.
545fd905-c335-405d-ae47-1c7cef35de67
Chapman, M.A.
8bac4a92-bfa7-4c3c-af29-9af852ef6383
Abbott, R.J.
545fd905-c335-405d-ae47-1c7cef35de67

Chapman, M.A. and Abbott, R.J. (2005) The origin of a novel form of Senecio (Asteraceae) restricted to sand dunes in southern Sicily. New Phytologist, 166 (3), 1051-1062. (doi:10.1111/j.1469-8137.2005.01393.x).

Record type: Article

Abstract

•?The taxonomy of diploid Mediterranean Senecio sect. Senecio (Asteraceae) is complex, owing to a recent species radiation, high morphological plasticity and occasional interspecific hybridization.

•?A study was conducted to resolve the origin of a novel form of Senecio restricted to sand dunes in southern Sicily, Italy. This has been described previously as morphologically intermediate to Senecio gallicus and Senecio glaucus ssp. coronopifolius, indicating a possible hybrid origin, or as a variant of Senecio leucanthemifolius.

•?Plants of this form grown in a glasshouse were morphologically intermediate to S. glaucus and S. leucanthemifolius, but were also similar to some cultivated individuals of S. gallicus. No evidence for a hybrid origin was obtained from a survey of random amplified polymorphic DNA variation; instead the plants surveyed were most closely allied to Tunisian S. glaucus. They were also polymorphic for the same set of cpDNA haplotypes present in Tunisian S. glaucus.

•?We conclude that the Sicilian Senecio is a variant form of North African S. glaucus ssp. coronopifolius, which most probably dispersed to sand dunes in southern Sicily in the relatively recent past. The presence of several cpDNA haplotypes in this material indicates that there have been multiple introductions of the species to Sicily.

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Published date: June 2005
Organisations: Centre for Biological Sciences

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Local EPrints ID: 352737
URI: http://eprints.soton.ac.uk/id/eprint/352737
ISSN: 0028-646X
PURE UUID: d582a901-c144-490b-9145-bd0fc38957e4
ORCID for M.A. Chapman: ORCID iD orcid.org/0000-0002-7151-723X

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Date deposited: 04 Jun 2013 13:46
Last modified: 20 Jul 2019 00:39

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Author: M.A. Chapman ORCID iD
Author: R.J. Abbott

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