New Zealand Journal of Agricultural Research abstracts
Cultivar release
‘Puna II’ forage chicory (Cichorium intybus L.)
W. Rumball
R. A. Skipp
R. G. Keogh
R. B. Claydon
AgResearch Grasslands
Private Bag 11 008
Palmerston North, New Zealand
Abstract ‘Puna II’ forage chicory (Cichorium intybus
L.) was bred from ‘Grasslands Puna’ chicory by selection for tolerance to
the fungus Sclerotinia, cool-season activity, greater uniformity,
and higher levels of the sesquiterpene lactones, lactucin and lactucopicrin.
It is intended for use as a pure sward on non-milking farms, and as a component
of mixed swards on all grazing farms. Breeding took place from 1992 to 1997,
and involved two interdependent screening paths, for (1) tolerance to Sclerotinia
and (2) vigour and uniformity, then high levels of lactucin and lactucopicrin.
In most years, the seed harvested from each path was incorporated also into
the alternate path for the following year. The two paths were combined in
1997 to provide a final single breeding population. ‘Puna II’ is more uniform
than ‘Grasslands Puna’ in morphology and leaf shape. It is also more erect
and much more winter-active, and at least as persistent. It is much more
persistent than a cultivar bred simultaneously for dairy farms (‘Choice’)
but slightly less winter-active, and has higher combined levels of lactucin
and lactucopicrin. About 3% of ‘Puna II’ plants bear only pink flowers, rather
than blue.
Keywords ‘Puna II’ forage chicory; Cichorium intybus
L.
A02037 Received 24 June 2002; accepted 17 October 2002; published 26 March
2003
New Zealand Journal of Agricultural Research, 2003, Vol. 46: 53-55
0028-8233/03/4601-0053 $7.00/0 © The Royal Society of New Zealand
2003Cultivar release
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