New Zealand Journal of Crop and Horticultural Science abstracts
Genotypic and environmental variation in bulb composition of New Zealand
adapted onion (Allium cepa) germplasm
J. A. MCCALLUM1
D. G. GRANT2
E. P. MCCARTNEY1
J. SCHEFFER3
M. L. SHAW1
R. C. BUTLER1
1New Zealand Institute of Crop & Food
Research Limited
Private Bag 4704
Christchurch, New Zealand
email: mccallumj@crop.cri.nz
2Hybrid Seed Company NZ Ltd
Patumahoe, RD 3
Pukekohe, New Zealand
3New Zealand Institute of Crop & Food
Research Limited
Cronin Rd
Pukekohe, New Zealand
Abstract Bulb pungency, soluble solids content, and storage
quality of 154 lines from the New Zealand Institute of Crop & Food Research
Limited onion (
Allium cepa L.) breeding programme were evaluated at
Pukekohe and Lincoln, New Zealand in the 1998/99 season. Within-site variation
was controlled by an experimental design incorporating systematically allocated
mild and pungent check lines rather than blocking. Spatial trends in bulb
composition were detected and adjustments made to models accordingly,
suggesting that this is an appropriate and efficient means of compensating for
within-site variation in onion trials. The lines surveyed included many that
were early, but few that were mild and/or had low soluble solids. Correlation
between soluble solids content and storage loss was observed at both sites. The
correlation observed between maturity date and frequency of rots at Pukekohe
was probably the result of greater impacts of onion thrip damage and wet
weather on late-maturing lines. We conclude that although selection for storage
and earliness in this programme have been effective lower pungency may have
been lost from mild introductions through lack of deliberate selection.
Keywords Allium cepa; onion; pungency; storage;
REML; plant breeding
H00039
Received 28 September 2000; accepted 16 May 2001
New Zealand Journal of Crop and Horticultural Science, 2001, Vol. 29:
149-158
0014-0671/01/2903-0149 $7.00 (c) The Royal Society of New Zealand 2001
PDF file of entire paper: medium quality (748K); (scanned from paper original: notes about this process)
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