Articles
BREEDING FOR RESISTANCE AGAINST BOTRYTIS IN LILY
Article number
836_20
Pages
143 – 148
Language
English
Abstract
The fungus Botrytis occurs worldwide and destroys various crops.
In lilies, the species Botrytis elliptica destroys leaves, flower buds and flowers.
Reddish-brown spots, the first evidence of the disease, appear on the leaves.
During wet weather, the spots eventually coalesce and the whole leaf collapses and decays.
To avoid the use of chemical pesticides and to make growing of plants economically sound and ecologically safe, in lily breeding the current activities are directed towards the development of disease-resistant cultivars.
Crosses between cultivars with different levels of resistance to Botrytis elliptica have been obtained.
Estimation of parent plants and the produced hybrids have been carried out by two years of testing on plants grown in natural environment (2004-2005). The level of Botrytis resistance was rated visually from 0-4 grades (0=healthy – 4=very susceptible). When Botrytis-resistant parents were crossed, the hybrids were characterized by degree of resistance to the disease; when Botrytis-susceptible cultivars were crossed with cultivars resistant to the disease, the hybrids are intermediate or susceptible.
Under field conditions, 10 perspective hybrids have been tested (2006-2007) for resistance to the grey mould.
After two years of testing, no significant differences in disease level have been found.
In lilies, the species Botrytis elliptica destroys leaves, flower buds and flowers.
Reddish-brown spots, the first evidence of the disease, appear on the leaves.
During wet weather, the spots eventually coalesce and the whole leaf collapses and decays.
To avoid the use of chemical pesticides and to make growing of plants economically sound and ecologically safe, in lily breeding the current activities are directed towards the development of disease-resistant cultivars.
Crosses between cultivars with different levels of resistance to Botrytis elliptica have been obtained.
Estimation of parent plants and the produced hybrids have been carried out by two years of testing on plants grown in natural environment (2004-2005). The level of Botrytis resistance was rated visually from 0-4 grades (0=healthy – 4=very susceptible). When Botrytis-resistant parents were crossed, the hybrids were characterized by degree of resistance to the disease; when Botrytis-susceptible cultivars were crossed with cultivars resistant to the disease, the hybrids are intermediate or susceptible.
Under field conditions, 10 perspective hybrids have been tested (2006-2007) for resistance to the grey mould.
After two years of testing, no significant differences in disease level have been found.
Publication
Authors
A. Balode
Keywords
crosses, estimation, grey mould, hybrids
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