New Zealand Journal of Botany abstracts

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Genetic relationships of Helichrysum dimorphum (Inuleae-Compositae (Asteraceae)) with H. filicaule, H. depressum, and Raoulia glabra as resolved by isozyme analysis

PETER HAASE

School of Forestry
University of Canterbury
Private Bag 4800
Christchurch, New Zealand1

ILSE BREITWIESER

School of Biological Sciences
Victoria University of Wellington
P.O. Box 600
Wellington, New Zealand2

JOSEPHINE M. WARD3

Plant and Microbial Sciences
University of Canterbury
Private Bag 4800
Christchurch, New Zealand
'Present address: Estacion Experimental de Zones
Aridas, c/o General Segura I., 04001-Almeria, Spain.
2Present address: Botanischer Garten und Botanisches
Museum Berlin-Dahlem, Konigin-Luise-Strasse 6-
8, D-1000 Berlin 33, Federal Republic of Germany.
3To whom all requests for reprints should be addressed.

Abstract Extracts of vegetative tissue of Helichrysum dimorphum, H. filicaule, H. depressum, and Raoulia glabra were fractionated by horizontal starch gel electrophoresis, and genetic variation between species was analysed at 18 enzymatic loci. Results provided no evidence for hybrid origin of H. dimorphum. H. dimorphum and H. filicaule have the highest genetic identity (0.765), and also share a duplication of the cytosolic phosphoglucose isomerase (PGI) locus, which was not found in the two remaining species. Genetic identities between any two of the three Helichrysum species are within the range reported for congeneric plant species, whereas genetic identities between the Helichrysum species studied and Raoulia glabra are considerably lower. The gene duplication of PGI in two but possibly not in the third investigated Helichrysum species may provide a genetic marker which could be useful in future phylogenetic studies of the New Zealand Inuleae.

Keywords Helichrysum dimorphum; Helichrysum filicaule; Helichrysum depressum; Raoulia glabra; hybridism; gene duplication; phosphoglucose isomerase; isozyme analysis; electrophoresis; New Zealand; Inuleae; Compositae; Asteraceae

B92024 ; Received 29 May 1992; accepted 5 February 1993
New Zealand Journal of Botany, 1993, Vol. 31: 59-64
0O28-825X/93/31O1-OO59 $2.50/0 © The Royal Society of New Zealand 1993

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