New Zealand Journal of Botany abstracts
Variation in DNA C-value and haploid genome size in New Zealand native
grasses
B. G. Murray
School of Biological Sciences
The University of Auckland
Private Bag 92019
Auckland, New Zealand
Email: b.murray@auckland.ac.nz
I. E. Weir
A. R. Ferguson
The Horticulture and Food Research Institute of New Zealand Ltd
Private Bag 92169
Auckland, New Zealand
P. J. de Lange
Science & Research Unit
Department of Conservation
Private Bag 68908
Newton
Auckland, New Zealand
Abstract Flow cytometry has been used to measure the
C-values of 29 species in 13 genera of New Zealand native grasses. An almost
18-fold variation was found between the lowest value, 0.78 pg for Zoysia
pauciflora, and the highest value, 13.70 pg for Pyrrhanthera exigua.
Some of this variation can be attributed to differences in chromosome number
or ploidy level but groups of related species with the same chromosome number
also show big interspecific differences. A distinction was found in general,
between species in genera of tropical origin and those of temperate origin.
In several cases there are examples of apparent intraspecific variation that
may indicate taxonomic heterogeneity.
Keywords C-value variation; flow cytometry; grasses;
ploidy level
B02029 Received 3 April 2002; accepted 4 November 2002; published 31 March
2003
New Zealand Journal of Botany, 2003, Vol. 41: 63-69
0028-825X/03/4101-0063 $7.00 © The Royal Society of New Zealand
2003
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