BREEDING OF CARNATIONS (DIANTHUS CARYOPHYLLUS L.) FOR RESISTANCE TO BACTERIAL WILT (BURKHOLDERIA CARYOPHYLLI)

Bacterial wilt caused by Burkholderia caryophylli is one of the most damaging
diseases of carnations in Japan.
We have performed repeated crossing and selection
for resistance to produce a new cultivar having resistance derived from Dianthus
capitatus ssp. andrzejowskianus, a wild species highly resistant to bacterial wilt.
We
have succeeded in developing the world’s first wilt-resistant carnation cultivar, ‘Karen
Rouge’. It is a deep yellowish-red standard-type cultivar selected from a cross between
carnation cultivar ‘Miracle Rouge’ and resistant line 4AZ31-5. ‘Karen Rouge’ has a
high degree of resistance to bacterial wilt, and its productivity and other traits
desirable for cut flowers are similar to those of modern commercial cultivars.
In 2004,
we initiated marker-assisted selection with the STS-WG44 marker, which is linked to
a QTL with a large effect for bacterial wilt resistance derived from D. capitatus ssp.
andrzejowskianus. This step reduced the labor and time required for testing the
resistance of breeding populations.
To our knowledge, this is also first cultivar
produced by marker-assisted selection in carnation.

XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Advances in Ornamentals, Landscape and Urban Horticulture

M. Yagi, N. Tanikawa, M. Shibata, T. Onozaki

marker-assisted selection (MAS), DNA marker, interspecific hybridization, quantitative trait locus (QTL)

https://doi.org/10.17660/ActaHortic.2012.937.52