Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker
Apple canker caused by the phytopathogenic fungus Neonectria ditissima is an economically important disease, which has spread in recent years to almost all pome-producing regions of the world. N. ditissima is able to cross-infect a wide range of apple varieties and causes branch and trunk lesions, k...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2016-09-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01365/full |
| _version_ | 1819174531195994112 |
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| author | Antonio Gomez-Cortecero Antonio Gomez-Cortecero Robert J Saville Robert J Saville Reiny W.A. Scheper Joanna Katharine Bowen Hugo Agripino de Medeiros Jennifer Kingsnorth Xiangming Xu Xiangming Xu Richard Jonathan Harrison Richard Jonathan Harrison |
| author_facet | Antonio Gomez-Cortecero Antonio Gomez-Cortecero Robert J Saville Robert J Saville Reiny W.A. Scheper Joanna Katharine Bowen Hugo Agripino de Medeiros Jennifer Kingsnorth Xiangming Xu Xiangming Xu Richard Jonathan Harrison Richard Jonathan Harrison |
| author_sort | Antonio Gomez-Cortecero |
| collection | DOAJ |
| description | Apple canker caused by the phytopathogenic fungus Neonectria ditissima is an economically important disease, which has spread in recent years to almost all pome-producing regions of the world. N. ditissima is able to cross-infect a wide range of apple varieties and causes branch and trunk lesions, known as cankers. Most modern apple varieties are susceptible and in extreme cases suffer from high mortality (up to 50%) in the early phase of orchard establishment. There is no known race structure of the pathogen and the global level of genetic diversity of the pathogen population is unknown. Resistance breeding is underway in many global breeding programmes, but nevertheless, a total resistance to canker has not yet been demonstrated. Here we present preliminary data from a survey of the phylogenetic relationships between global isolates of N. ditissima which reveals only slight evidence for population structure. In addition we report the results of four rapid screening tests to assess the response to N. ditissima in different apple scion and rootstock varieties, which reveals abundant variation in resistance responses in both cultivar and rootstock material. Further seedling tests show that the segregation patterns of resistance and susceptibility vary widely between crosses. We discuss inconsistencies in test performance with field observations and discuss future research opportunities in this area. |
| first_indexed | 2024-12-22T20:40:27Z |
| format | Article |
| id | doaj.art-ee45b9ce0aa9408c9c302d962f8819e9 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-22T20:40:27Z |
| publishDate | 2016-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-ee45b9ce0aa9408c9c302d962f8819e92022-12-21T18:13:21ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2016-09-01710.3389/fpls.2016.01365191865Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European cankerAntonio Gomez-Cortecero0Antonio Gomez-Cortecero1Robert J Saville2Robert J Saville3Reiny W.A. Scheper4Joanna Katharine Bowen5Hugo Agripino de Medeiros6Jennifer Kingsnorth7Xiangming Xu8Xiangming Xu9Richard Jonathan Harrison10Richard Jonathan Harrison11NIAB-EMRUniversity of ReadingNIAB-EMRUniversity of ReadingThe New Zealand Institute for Plant and Food Research Limited (PFR), Havelock NorthThe New Zealand Institute for Plant and Food Research Limited (PFR)- AucklandEmpresa de Pesquisa Agropecuária e Extensão Rural de Santa CatarinaNIAB-EMRNIAB-EMRUniversity of ReadingNIAB-EMRUniversity of ReadingApple canker caused by the phytopathogenic fungus Neonectria ditissima is an economically important disease, which has spread in recent years to almost all pome-producing regions of the world. N. ditissima is able to cross-infect a wide range of apple varieties and causes branch and trunk lesions, known as cankers. Most modern apple varieties are susceptible and in extreme cases suffer from high mortality (up to 50%) in the early phase of orchard establishment. There is no known race structure of the pathogen and the global level of genetic diversity of the pathogen population is unknown. Resistance breeding is underway in many global breeding programmes, but nevertheless, a total resistance to canker has not yet been demonstrated. Here we present preliminary data from a survey of the phylogenetic relationships between global isolates of N. ditissima which reveals only slight evidence for population structure. In addition we report the results of four rapid screening tests to assess the response to N. ditissima in different apple scion and rootstock varieties, which reveals abundant variation in resistance responses in both cultivar and rootstock material. Further seedling tests show that the segregation patterns of resistance and susceptibility vary widely between crosses. We discuss inconsistencies in test performance with field observations and discuss future research opportunities in this area.http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01365/fullDisease ResistancephylogeneticsPathogenicity testNeonectria ditissimaEuropean canker |
| spellingShingle | Antonio Gomez-Cortecero Antonio Gomez-Cortecero Robert J Saville Robert J Saville Reiny W.A. Scheper Joanna Katharine Bowen Hugo Agripino de Medeiros Jennifer Kingsnorth Xiangming Xu Xiangming Xu Richard Jonathan Harrison Richard Jonathan Harrison Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker Frontiers in Plant Science Disease Resistance phylogenetics Pathogenicity test Neonectria ditissima European canker |
| title | Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker |
| title_full | Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker |
| title_fullStr | Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker |
| title_full_unstemmed | Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker |
| title_short | Variation in host and pathogen in the Neonectria/Malus interaction; towards an understanding of the genetic basis of resistance to European canker |
| title_sort | variation in host and pathogen in the neonectria malus interaction towards an understanding of the genetic basis of resistance to european canker |
| topic | Disease Resistance phylogenetics Pathogenicity test Neonectria ditissima European canker |
| url | http://journal.frontiersin.org/Journal/10.3389/fpls.2016.01365/full |
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