New Zealand Journal of Crop and Horticultural Science abstracts
Variation in flowering within Actinidia chinensis vines
A. C. RICHARDSON
The Horticulture and Food Research
Institute of New Zealand Ltd
Kerikeri Research Centre
P. O. Box 23
Kerikeri, New Zealand
email: arichardson@hortresearch.co.nz
W. P. SNELGAR
H. N. DE SILVA
H. R. PAUL
The Horticulture and Food Research
Institute of New Zealand Ltd
Mt Albert Research Centre
Private Bag 92 169
Auckland, New Zealand
Abstract Variation in the time of flowering within vines of
two
Actinidia chinensis (Planch.) var.
chinensis cultivars,
`Hort16A' and `37-3-18A' (`18A'), is described. The flowering capacity of the
two cultivars was very different, with 106 terminal flowers and 50 lateral
flowers/m
2 of canopy on `18A' vines compared to only 39 terminal
flowers/m
2 on `Hort16A' vines. However the variation within vines
was similar. The most consistent systematic trend in the time of flowering was
within canes, where time of flowering varied by up to 7 days. Shoots near the
apex of the cane produced more flowers and they opened earlier than shoots near
the cordon. Vines of both cultivars produced a large number of canes near the
trunk and few at the end of cordons. However, time of flowering was not
consistently affected by position on the cordon, cane size, or type of fruiting
wood. On `18A' vines, lateral flowers formed a separate population, opening 4-5
days after terminal flowers, and should be monitored separately. Any sampling
scheme developed from these data should take account of variation within canes.
Vines should be managed to reduce variation in flowering date, which has been
linked to unwanted variation in fruit maturity at harvest.
Keywords Actinidia chinensis; flowering;
cultivars; within-vine variation; spatial variation
H00018
Received 10 July 2000; accepted 22 February 2001
New Zealand Journal of Crop and Horticultural Science, 2001, Vol. 29:
103-110
0014-0671/01/2902-0103 $7.00 (c) The Royal Society of New Zealand 2001
PDF file of entire paper: medium quality (585K); (scanned from paper original: notes about this process)
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