New Zealand Journal of Botany abstracts
DNA fingerprinting supports hybridisation as a factor explaining
complex natural variation in Phormium (Hemerocallidaceae)
R. D. Smissen
P. B. Heenan
Allan Herbarium
Landcare Research
PO Box 40
Lincoln 7640, New Zealand
Abstract Analysis of AFLP profiles from 47
wild-sourced plants of Phormium from New Zealand and Norfolk
Island reveals two major genetic groups corresponding with the two
currently recognised and sympatric species (P. cookianum and
P. tenax). In addition, plants from a number of coastal sites, a
putative F1 hybrid, and some plants identified a
priori as P. cookianum display AFLP profiles consistent with a
hybrid origin. These putative hybrid plants have varying genomic
composition, and some were collected from morphologically uniform
populations. Others depart from the intermediate morphology expected of
F1 hybrids. Therefore, introgression between P.
cookianum and P. tenax and the existence of stabilised
hybrid derivatives appears likely. Some degree of geographic
structuring of genetic diversity is evident in both species.
Keywords Phormium tenax; P. cookianum;
P. "Coast"; AFLP; hybridisation; New Zealand flora
B06036; Online publication date 22 May 2007; Received 4 September
2006; accepted 2 April 2007
New Zealand Journal of Botany, 2007, Vol. 45: 419—432
0028—825X/07/4502—0419 © The Royal Society of New Zealand 2007
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