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231224s2013 xx |||||o 00| ||eng c |
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|a 10.1111/nph.12178
|2 doi
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|a pubmed24n0750.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Balesdent, Marie-Hélène
|e verfasserin
|4 aut
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| 245 |
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|a The dispensable chromosome of Leptosphaeria maculans shelters an effector gene conferring avirulence towards Brassica rapa
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|c 2013
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 25.11.2013
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|a Date Revised 18.03.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.
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|a Phytopathogenic fungi frequently contain dispensable chromosomes, some of which contribute to host range or pathogenicity. In Leptosphaeria maculans, the stem canker agent of oilseed rape (Brassica napus), the minichromosome was previously suggested to be dispensable, without evidence for any role in pathogenicity. Using genetic and genomic approaches, we investigated the inheritance and molecular determinant of an L. maculans-Brassica rapa incompatible interaction. Single gene control of the resistance was found, while all markers located on the L. maculans minichromosome, absent in the virulent parental isolate, co-segregated with the avirulent phenotype. Only one candidate avirulence gene was identified on the minichromosome, validated by complementation experiments and termed AvrLm11. The minichromosome was frequently lost following meiosis, but the frequency of isolates lacking it remained stable in field populations sampled at a 10-yr time interval, despite a yearly sexual stage in the L. maculans life cycle. This work led to the cloning of a new 'lost in the middle of nowhere' avirulence gene of L. maculans, interacting with a B. rapa resistance gene termed Rlm11 and introgressed into B. napus. It demonstrated the dispensability of the L. maculans minichromosome and suggested that its loss generates a fitness deficit
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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1 |
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|a Fudal, Isabelle
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ollivier, Bénédicte
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bally, Pascal
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Grandaubert, Jonathan
|e verfasserin
|4 aut
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| 700 |
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|a Eber, Frédérique
|e verfasserin
|4 aut
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| 700 |
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|a Chèvre, Anne-Marie
|e verfasserin
|4 aut
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| 700 |
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|a Leflon, Martine
|e verfasserin
|4 aut
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| 700 |
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|a Rouxel, Thierry
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 198(2013), 3 vom: 06. Mai, Seite 887-898
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:198
|g year:2013
|g number:3
|g day:06
|g month:05
|g pages:887-898
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|u http://dx.doi.org/10.1111/nph.12178
|3 Volltext
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|h 887-898
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