Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations

Alternaria brown spot (ABS) in citrus is a serious disease caused by the tangerine pathotype of the fungus Alternaria alternata, which induces necrotic lesions on fruit and young leaves, defoliation and fruit drop in susceptible genotypes. It is a strong concern for triploid breeding programs aiming...

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Main Authors: Cuenca, José, Aleza, Pablo, Iborra, E., Vicent, Antonio, Ollitrault, Patrick, Navarro, Luis
Other Authors: Sabater-Munoz, Beatriz
Format: Objeto de conferencia
Language:Inglés
Published: 2017
Online Access:http://hdl.handle.net/20.500.11939/5068
https://doi.org/10.17660/ActaHortic.2015.1065.51
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author Cuenca, José
Aleza, Pablo
Iborra, E.
Vicent, Antonio
Ollitrault, Patrick
Navarro, Luis
author2 Sabater-Munoz, Beatriz
author_browse Aleza, Pablo
Cuenca, José
Iborra, E.
Navarro, Luis
Ollitrault, Patrick
Sabater-Munoz, Beatriz
Vicent, Antonio
author_facet Sabater-Munoz, Beatriz
Cuenca, José
Aleza, Pablo
Iborra, E.
Vicent, Antonio
Ollitrault, Patrick
Navarro, Luis
author_sort Cuenca, José
collection ReDivia
description Alternaria brown spot (ABS) in citrus is a serious disease caused by the tangerine pathotype of the fungus Alternaria alternata, which induces necrotic lesions on fruit and young leaves, defoliation and fruit drop in susceptible genotypes. It is a strong concern for triploid breeding programs aiming to produce seedless mandarin cultivars. In the present work, we have taken advantage of the particular genetic structures of unreduced megagametophytes resulting from second division restitution (SDR) (leading to triploid hybrid recovery) to map a genome region linked to ABS resistance in citrus. The monolocus dominant inheritance of susceptibility, proposed on the basis of diploid population studies, was corroborated in triploid progeny. Bulk segregant analysis coupled with genome scan using a large set of genetically mapped SNP markers and targeted genetic mapping by half tetrad analysis, using SSR and SNP markers, allowed locating a region linked to ABS resistance near the centromere of chromosome III. SSR and SNP markers were developed for efficient early marker-assisted selection (MAS) of ABS resistant hybrids.
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institution Instituto Valenciano de Investigaciones Agrarias (IVIA)
language Inglés
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spelling ReDivia50682025-04-25T14:53:57Z Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations Acta Horticulturae Cuenca, José Aleza, Pablo Iborra, E. Vicent, Antonio Ollitrault, Patrick Navarro, Luis Sabater-Munoz, Beatriz Moreno, Pedro Pena, Leandro Navarro, Luis Alternaria brown spot (ABS) in citrus is a serious disease caused by the tangerine pathotype of the fungus Alternaria alternata, which induces necrotic lesions on fruit and young leaves, defoliation and fruit drop in susceptible genotypes. It is a strong concern for triploid breeding programs aiming to produce seedless mandarin cultivars. In the present work, we have taken advantage of the particular genetic structures of unreduced megagametophytes resulting from second division restitution (SDR) (leading to triploid hybrid recovery) to map a genome region linked to ABS resistance in citrus. The monolocus dominant inheritance of susceptibility, proposed on the basis of diploid population studies, was corroborated in triploid progeny. Bulk segregant analysis coupled with genome scan using a large set of genetically mapped SNP markers and targeted genetic mapping by half tetrad analysis, using SSR and SNP markers, allowed locating a region linked to ABS resistance near the centromere of chromosome III. SSR and SNP markers were developed for efficient early marker-assisted selection (MAS) of ABS resistant hybrids. 2017-06-01T10:11:39Z 2017-06-01T10:11:39Z 2015 2015 conferenceObject Cuenca, J., Aleza, P., Iborra, E., Vicent, A., Ollitrault, P. & Navarro, L. (2012). Location of a chromosome region linked to Alternaria Brown Spot resistance from the evaluation of triploid mandarin populations. Acta Horticulturae, 1065, 415-425. 0567-7572; 978-94-62610-53-8 http://hdl.handle.net/20.500.11939/5068 https://doi.org/10.17660/ActaHortic.2015.1065.51 en openAccess Impreso
spellingShingle Cuenca, José
Aleza, Pablo
Iborra, E.
Vicent, Antonio
Ollitrault, Patrick
Navarro, Luis
Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations
title Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations
title_full Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations
title_fullStr Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations
title_full_unstemmed Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations
title_short Location of a Chromosome Region Linked to Alternaria Brown Spot Resistance from the Evaluation of Triploid Mandarin Populations
title_sort location of a chromosome region linked to alternaria brown spot resistance from the evaluation of triploid mandarin populations
url http://hdl.handle.net/20.500.11939/5068
https://doi.org/10.17660/ActaHortic.2015.1065.51
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