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Genetic basis for resistance against fruit tree canker in apple

Ghasemkhani, Marjan (2012). Genetic basis for resistance against fruit tree canker in apple. Alnarp: (LTJ, LTV) > Plant Breeding and Biotechnology (until 121231), Sveriges lantbruksuniversitet. Introductory paper at the Faculty of Landscape Planning, Horticulture and Agricultural Science ; 2012:7
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Abstract

Neonectria ditissima (formerly Neonectria galligena, anamorph Cylindrocarpon heteronema) is the causal agent of fruit tree canker which is regarded as a serious economic problem in horticulture. This fungus causes notable damage to apple trees and it is very important in some regions, especially North western Europe, where it can result in death of spur shoots and branches. Although it occurs in a wide range of temperatures, it is associated with wet weather and climate has an important effect on the geographic distribution. The fungus produces conidia and ascospores, both of which are dispersed and cause infection during prolonged periods of rainy weather. Also, spores produced on the infected wood can act as an infection source in the orchards. The fungus can therefore be introduced into new orchards with infected planting material from other orchards or tree nurseries. Chemical and mechanical control like spraying of fungicides, covering wounds with paint, and cutting out infected branches, do not prevent the occurrence of epidemics. Breeding cultivars with a high level of resistance towards canker would be of great help towards the avoidance of this disease. Apple cultivars show variable levels of partial resistance to the fungus, whereas complete resistance has not yet been reported and no major genes have been identified. Therefore, apple genotypes with comparatively high levels of genetically determined partial resistance should be identified for use in apple breeding.

Authors/Creators:Ghasemkhani, Marjan
Title:Genetic basis for resistance against fruit tree canker in apple
Series/Journal:Introductory paper at the Faculty of Landscape Planning, Horticulture and Agricultural Science (1654-3580)
Year of publishing :25 September 2012
Number:2012:7
Page range:
Number of Pages:47
Place of Publication:Alnarp
Publisher:Faculty of Landscape Planning, Horticulture and Agricultural Science, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:Z - SLU - Libray > Odla mera
ISSN:1654-3580
Language:English
Publication Type:Report
Version:Published version
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant breeding
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Plant Biotechnology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:Apple canker, Neonectria ditissima, Neonectria galligena, Nectria galligena, Fruit tree canker
URN:NBN:urn:nbn:se:slu:epsilon-e-626
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-626
ID Code:9096
Faculty:LTJ - Faculty of Landscape Planning, Horticulture and Agricultural Science (until 2013)
Department:(LTJ, LTV) > Plant Breeding and Biotechnology (until 121231)
Deposited By: Mrs Marjan Ghasemkhani
Deposited On:26 Sep 2012 07:14
Metadata Last Modified:28 Oct 2015 08:53

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