Articles
New cultivars resistant to Verticillium wilt obtained in the olive breeding program of IFAPA in Córdoba, Spain
Article number
1446_16
Pages
113 – 116
Language
English
Abstract
The use of resistant cultivars is one of the most recommended measures within the framework of an integrated pest management control strategy for Verticillium wilt in olive (VWO). However, only a limited number of traditional cultivars have shown high levels of resistance and the agronomic performance of these resistant cultivars does not always fulfill the requirements of growers.
The olive breeding program of IFAPA aims to select new olive genotypes showing both high levels of resistance to VW and interesting agronomic characteristics for olive oil production.
Cross-breeding between parents with known resistance levels was carried out followed by initial selection of seedlings on the basis of their agronomic performance for traits of interest.
Selected seedlings were then tested for resistance to VWO by artificial inoculation tests under controlled conditions.
Then resistance was reconfirmed in artificially inoculated microplots and field trials under natural conditions.
Some contradictory results were obtained for the different methodologies of disease resistance evaluation.
This underlines the need for long-term experimentation under natural environmental conditions.
The field trials were also used to evaluate agronomic traits and oil quality.
As a result of all these works, three new cultivars have finally been selected as showing high levels of resistance to the disease in a consistent manner, together with interesting agronomic characteristics in terms of high productivity, oil yield and different oil composition and sensory profiles.
These new cultivars have been registered as especially recommended in areas with high risk of VWO.
The olive breeding program of IFAPA aims to select new olive genotypes showing both high levels of resistance to VW and interesting agronomic characteristics for olive oil production.
Cross-breeding between parents with known resistance levels was carried out followed by initial selection of seedlings on the basis of their agronomic performance for traits of interest.
Selected seedlings were then tested for resistance to VWO by artificial inoculation tests under controlled conditions.
Then resistance was reconfirmed in artificially inoculated microplots and field trials under natural conditions.
Some contradictory results were obtained for the different methodologies of disease resistance evaluation.
This underlines the need for long-term experimentation under natural environmental conditions.
The field trials were also used to evaluate agronomic traits and oil quality.
As a result of all these works, three new cultivars have finally been selected as showing high levels of resistance to the disease in a consistent manner, together with interesting agronomic characteristics in terms of high productivity, oil yield and different oil composition and sensory profiles.
These new cultivars have been registered as especially recommended in areas with high risk of VWO.
Publication
Authors
L. León, R. de la Rosa
Keywords
extra virgin olive oil, cross-breeding, disease, Olea europaea L, Verticillium dahliae Kleb
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