New Zealand Journal of Botany abstract
B97078
Received 30 November 1997; accepted 16 January 1998
Chromosome numbers of Phragmites australis (Arundineae: Gramineae) in
New Zealand
H. E. CONNOR
Department of Geography
University of Canterbury
Private Bag 4800
Christchurch, New Zealand
M. I. DAWSON
Landcare Research
P. O. Box 69
Lincoln, New Zealand
R. D. KEATING
L. S. GILL
Oceans Environmental Engineering (NZ) Ltd
Clarkville, New Zealand
Abstract Somatic chromosome numbers for New Zealand
provenances of
Phragmites australis are reported. A wide range of
cytological variation was encountered--one plant was tetraploid (2
n =
4
x2 = 48), two were octoploid (2
n = 8
x2 = 96), and two
were mixoploid (2
n = 48, 53, 54; and 2
n = 96, c. 264). One
Australian provenance was octoploid. Possible regions of origin for the New
Zealand populations are suggested, and multiple introductions postulated,
although it is conceivable that some octoploids could be indigenous in a
cytodeme shared with Australia.
Keywords chromosome numbers; polyploidy; aneuploidy;
mixoploidy; Arundineae; Gramineae; Phragmites; P. australis; New
Zealand; Australia
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