Brown spot of tangerine hybrid cultivars Minneola, Page and Fortune caused by <i>Alternaria alternata</i> in Iran

Golmohammadi, M.; Andrew, Marion; Peever, Tobin L.; Peres, Natália A.; Timmer, L. W.

doi:10.1111/j.1365-3059.2006.01427.x

Cited by 11 publications

(10 citation statements)

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“…Keissl., that induces necrotic lesions on fruits and young leaves, defoliation and fruit drop in susceptible citrus genotypes (Akimitsu et al, 2003). The disease was first observed in Australia in 1903 on “Emperor” mandarin (Pegg, 1966) and was subsequently detected in citrus-growing regions all over the world (Vicent et al, 2000; Timmer et al, 2003; Golmohammadi et al, 2006; Wang et al, 2010). Currently, ABS control is primarily based on fungicide application.…”

Section: Introductionmentioning

confidence: 99%

Fine Mapping for Identification of Citrus Alternaria Brown Spot Candidate Resistance Genes and Development of New SNP Markers for Marker-Assisted Selection

et al. 2016

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Alternaria brown spot (ABS) is a serious disease affecting susceptible citrus genotypes, which is a strong concern regarding citrus breeding programs. Resistance is conferred by a recessive locus (ABSr) previously located by our group within a 3.3 Mb genome region near the centromere in chromosome III. This work addresses fine-linkage mapping of this region for identifying candidate resistance genes and develops new molecular markers for ABS-resistance effective marker-assisted selection (MAS). Markers closely linked to ABSr locus were used for fine mapping using a 268-segregating diploid progeny derived from a heterozygous susceptible × resistant cross. Fine mapping limited the genomic region containing the ABSr resistance gene to 366 kb, flanked by markers at 0.4 and 0.7 cM. This region contains nine genes related to pathogen resistance. Among them, eight are resistance (R) gene homologs, with two of them harboring a serine/threonine protein kinase domain. These two genes along with a gene encoding a S-adenosyl-L-methionine-dependent-methyltransferase protein, should be considered as strong candidates for ABS-resistance. Moreover, the closest SNP was genotyped in 40 citrus varieties, revealing very high association with the resistant/susceptible phenotype. This new marker is currently used in our citrus breeding program for ABS-resistant parent and cultivar selection, at diploid, triploid and tetraploid level.

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Section: Introductionmentioning

confidence: 99%

Fine Mapping for Identification of Citrus Alternaria Brown Spot Candidate Resistance Genes and Development of New SNP Markers for Marker-Assisted Selection

et al. 2016

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“…It has been reported in the US . In Iran, ABS was first described in 2006 on tangerine hybrid cultivars (Minneola, Page, and Fortune) and then on other citrus cultivars 9 . Alternaria spp.…”

Section: Introductionmentioning

confidence: 99%

Genetic differences in Alternaria alternata isolates associated with brown spot in tangerine cultivars

Lengi¹,

Niazmand²,

Kianoush³

2014

ScienceAsia

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Alternaria alternata is one of the most important fungi causing brown spot on tangerine. Samples of A. alternata were collected from different cultivars of tangerine affected by brown spot in orchards in Jahrom region, Iran. Samples were cultured on potato dextrose agar (PDA) media and purified using the single-spore method. Pathogenicity tests were done based on Koch's postulates on healthy and scratched leaves of different tangerine cultivars. All isolates were pathogenic on both healthy and scratched leaves. Ponkan and Mahalli (local isolates) showed the greatest growth, while Fortune and Kinnow isolates had the least growth on PDA media. The rDNA ITS1 region of Clementine, Mahalli, Ponkan, Lee, Fortune, Kinnow, Page, and Osceola isolates was sequenced. One PCR product (360 bp) was recovered from all mycelia multiplications. Sequences of all isolates were deposited in GenBank. BLAST searches of the NCBI database showed that the closest matches were A. alternata. The morphological tests were supported by molecular experiments. The phylogenetic tree of the sequences was mapped based on neighbour-joining procedures. Grouping of all isolate sequences placed them in two main clusters. Mahalli isolates in cluster 2 were in a different group from the other isolates. In general, the results showed intra-species genetic differences in rDNA ITS1 sequences among A. alternata isolates collected from tangerine cultivars. In this study, A. alternata was identified as the cause of Alternaria brown spot of tangerine cultivars in southern Iran.

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“…Africa, Iran and China (Goes et al, 2001;Timmer et al, 2003;Golmohammadi et al, 2006;Wang et al, 2010). In Spain, the disease was first detected in 1998 (Vicent et al, 2000) and it is currently widespread in most citrus-growing areas.…”

Section: Special Focus On Breeding For Alternaria Brown Spot Resistancementioning

confidence: 99%

“…The disease was first observed in Australia in 1903 on the 'Emperor' mandarin (Pegg, 1966), and was subsequently detected in citrus-growing regions in America, the Mediterranean Basin, South Africa, Iran and China (Timmer et al, 2003;Golmohammadi et al, 2006;Wang et al, 2010). In Spain, the disease was first detected in 1998 (Vicent et al, 2000), and it is currently widespread in all citrus-growing areas, affecting mainly 'Fortune' and 'Nova' mandarin hybrids.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of sexual polyploidization and inheritance in triploid citrus populations

Cuenca¹

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Durante estos años, muchas han sido las personas que han contribuido de una forma o de otra en el desarrollo de esta tesis, por lo que gran parte de ella les pertenece. A todos ellos, debo y quiero expresarles mi gratitud.En primer lugar, quiero dar las gracias al IVIA y a su ex-director, Dr. Florentino Juste, por haberme dado la oportunidad de desarrollar mi trabajo en este centro. Quiero agradecer al Dr. Luis Navarro su confianza en mí para trabajar en su grupo (hace ahora 13 años) y realizar posteriormente esta tesis doctoral bajo su dirección. Durante todos estos años, su consejo y guía han sido imprescindibles para mi formación como profesional. Quiero agradecer de forma especial al Dr. Patrick Ollitrault, codirector de esta tesis, su apoyo y confianza en mi trabajo desde el principio. Su gran capacidad para orientar las investigaciones ha sido definitiva para el desarrollo de esta tesis, la cual no se habría podido concebir sin su inestimable participación. Quiero dar las gracias también a mi tutora, Dra. Mª José Díez, por estar siempre dispuesta a ayudar en cualquier tarea necesaria para el desarrollo de la tesis.Quiero dar las gracias a mis compañeros del Laboratorio de Cultivo de Tejidos. A Pepe Juárez, su apoyo incondicional y confianza en mi; siempre he recibido de él buenos consejos y me ha enseñado todo lo que puedo saber sobre cultivo in vitro. A Pablo Aleza debo agradecerle, ante todo, su amistad y, por supuesto, su colaboración en todos los trabajos desarrollados en esta tesis. Gracias también a Juana Mª, Carmen, Toni, Vio, Cloti y Marga por ayudarme siempre en todo lo que he necesitado. Quiero agradecer a mis compañeros del laboratorio CIRAD-IVIA, su inestimable ayuda en este trabajo y su paciencia para aguantarme (Frederique, Juan, María, Marta, Ana, Houssem). De forma especial, quiero dar las gracias a Andrés (Dr. García-Lor et al) por su amistad, su gran predisposición a ayudarme y colaboración en esta tesis.Agradecer también a todos aquéllos que en algún momento me han aconsejado y guiado en mis investigaciones (José Guerri, Leandro Peña, Gema Ancillo, José A. Pina, Alejandro Medina). Gracias a todos mis compañeros del centro, tanto a los que trabajan en los laboratorios (Ana, Elsa, Nuria, Berta, Montse, Jesús, Karelia, Vero, Toni, Daniel, Sandra, Pilar, Sawsen) como a los que trabajan en el campo o invernaderos (Vicente Lloris, José Manuel, Octavio (Paco), Fran, Aurelio, José Lloris, Diego, Raquel, Toni, Ramón, Ferran) y, en especial, a Rafa Montalt y Josep Peris (xufa) por ser más amigos que compañeros. Quiero agradecer a todos los que, de alguna forma, han convivido conmigo durante estos años (administración, conserjería, cafetería, limpieza, mantenimiento). Quiero recordar también a todos los que han pasado por el IVIA durante un tiempo más o menos largo (Magda, Mamen, Pedro, Álida, Giovanni, Jorge, Regina, Inma, Diana, Ezequiel, Lucía, Águeda, Marta, Esther) y especialmente a Mari Cruz, Frank, Rosa y José Manuel, con los que he convivido intensamente durante varios años.Por supuesto, q...

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Brown spot of tangerine hybrid cultivars Minneola, Page and Fortune caused by Alternaria alternata in Iran

Cited by 11 publications

References 4 publications

Fine Mapping for Identification of Citrus Alternaria Brown Spot Candidate Resistance Genes and Development of New SNP Markers for Marker-Assisted Selection

Fine Mapping for Identification of Citrus Alternaria Brown Spot Candidate Resistance Genes and Development of New SNP Markers for Marker-Assisted Selection

Genetic differences in Alternaria alternata isolates associated with brown spot in tangerine cultivars

Mechanisms of sexual polyploidization and inheritance in triploid citrus populations

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