Fresh Market Tomato Breeding in the Usa

Scott, JB

doi:10.17660/actahortic.2008.789.1

Cited by 5 publications

(4 citation statements)

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“…Although I and I-2 have been used most often for breeding purposes (Scott 2008), currently I-3 is a preferred resistance gene because race 3 is becoming more common than before and also few tomato cultivars are available with I-3 resistance gene. Thus far, three co-dominant CAPS markers (P7-43B, PTG-190, and CT226) and five co-dominant SCAR markers (P7-43DF1/R1, P7-43DF3/R1, Me-Em-A, Me-Em-B, and Me8-Em5) have been reported to be associated with I-3 (Table 2).…”

Section: Fusarium Wiltmentioning

confidence: 99%

RETRACTED ARTICLE: A reexamination of molecular markers for use in marker-assisted breeding in tomato

Panthee

Foolad

2011

Euphytica

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Molecular markers have been used for identification and mapping of genes and QTLs for numerous agriculturally important traits in tomato, including resistance/tolerance to biotic and abiotic stresses and fruit-and flower-related characteristics. However, the extent to which markers have been utilized in tomato breeding programs has not been clearly determined. A review of the literature indicated that the utility of most markers for use in tomato breeding programs have not been verified. Many markers are not validated across tomato genotypes or are not polymorphic within tomato breeding populations. In this study, we examined the utility of available markers for several major disease resistance traits in tomato by testing them in a number of breeding lines and commercial cultivars with known resistance/susceptibility responses. While several markers were validated, others needed PCR optimization for successful amplifications or were not informative in the genotypes used. Specifically, of the 37 markers examined 19 (*51%) were informative, including markers for resistance to Fusarium wilt, late blight, bacterial wilt, tomato mosaic virus, tomato spotted wilt virus, and root knot nematodes. It appears that many of the available markers may need to be further refined or examined for trait association and presence of polymorphism in breeding lines and populations. However, with recent advances in tomato sequencing, it is becoming increasingly possible to develop more informative markers to accelerate the use of MAS in tomato breeding.

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Section: Fusarium Wiltmentioning

confidence: 99%

RETRACTED ARTICLE: A reexamination of molecular markers for use in marker-assisted breeding in tomato

Panthee

Foolad

2011

Euphytica

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“…El mejoramiento genético en tomate se ha orientado al rendimiento, adaptación a condiciones cálidas y húmedas, resistencia a enfermedades y calidad del fruto (Bai y Lindhout, 2007;Scott, 2008), esta última medida por contenido de sólidos solubles totales (SST), color del fruto, acidez titulable (AT) y pH del jugo (Stevens, 1973).…”

Section: Introductionunclassified

“…Además, las nuevas técnicas de producción, las recientes exigencias agrícolas e industriales, y los continuos problemas derivados de nuevas enfermedades y plagas, han obligado a desarrollar nuevas variedades de manera continua (Escalona et al, 2009). El mejoramiento genético de tomate en el mundo es desarrollado principalmente por universidades extranjeras y empresas transnacionales (Scott, 2008), las cuales venden semillas híbridas que se cotizan en dólares o euros. Debido a esto, los costos de producción son considerablemente altos para muchos productores mexicanos de tomate, pues los precios frecuentemente rebasan los 0.50 centavos de dólar por cada semilla híbrida (Juárez et al, 2000).…”

Section: Introductionunclassified

COMPORTAMIENTO AGRONÓMICO DE POBLACIONES F2 DE HÍBRIDOS DE TOMATE (Solanum lycopersicum L.)

et al. 2013

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Casi toda la semilla de tomate (Solanum lycopersicum L.) que se utiliza para siembras comerciales en México proviene de empresas extranjeras, por lo que el costo de dicha semilla es muy alto. Esta situación provoca que en ocasiones el pequeño productor siembre semilla de generaciones tempranas (F2 y F3) de híbridos, con la posible pérdida de rendimiento y calidad de fruto. En este trabajo se evaluó el rendimiento de fruto por planta (PTF), componentes de rendimiento y algunos caracteres de calidad de siete híbridos de tomate tipo Saladette de crecimiento indeterminado, y sus respectivas generaciones F2, bajo un diseño experimental de bloques completos al azar con cuatro repeticiones, en plantas crecidas en condiciones de invernadero e hidroponía. El análisis de varianza de contrastes de los promedios F1 vs. F2 detectó diferencias significativas para la variable PTF en cinco de los siete genotipos (‘Sun 7705’, ‘Moctezuma’, ‘Cuauhtémoc’, ‘Reserva’ y ‘Cid’). En las variedades ‘Espartaco’ y ‘Loreto’ las diferencias no fueron significativas, es decir, la reducción del rendimiento en las generaciones F2 fue mínima, lo cual sugiere que la depresión endogámica de una generación F2 depende particularmente de la constitución genética de las líneas que hayan dado lugar al híbrido comercial. Para las variables número total de frutos, contenido de sólidos solubles totales, firmeza y longitud de fruto y pH del jugo del fruto, de manera general y para la mayoría de los genotipos se observó que no hubo diferencias estadísticas entre los promedios de las generaciones F1 y F2, lo cual indica que la magnitud de estas características, algunas de ellas de calidad, se mantiene en individuos segregantes F2.

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“…The use of resistance cultivars is effective for controlling FCRR. However, the Frl resistance gene conferring resistance to FCRR is only deployed in a few new cultivars (Scott 2008). Susceptible cultivars with satisfactory horticultural traits are still being used by tomato growers.…”

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confidence: 99%

Silicon Suppresses Fusarium Crown and Root Rot of Tomato

Huang

Roberts

Datnoff

2011

Journal of Phytopathology

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Fusarium oxysporum f.sp. radicis-lycopersici, the causal agent of Fusarium crown and root rot (FCRR), is a serious soilborne disease of tomato. Soil fumigation and host resistance may reduce the impact of this disease, but other alternative management strategies are needed because these options may not always be available or effective. The purpose of this study was to determine the potential of silicon (Si) to reduce the disease severity of FCRR. Seven-day-old seedlings of Bonny Best tomato, susceptible to FCRR, were transplanted in sand culture amended with HoaglandÕs nutrient solution with (+Si) or without ()Si) 100 mg Si ⁄ l. At 3 weeks after transplanting, three inoculum concentrations 0, 10 6 and 10 7 conidia ⁄ plant were used to inoculate the seedlings. Disease severity and silicon concentration were evaluated at 4 weeks after inoculation. Disease progress over time was investigated using the seedlings amended with Si or without Si and inoculated with 0 or 10 6 conidia ⁄ plant. Disease severity was evaluated at 2, 3, 4 and 6 weeks after inoculation. After rating disease, evaluated plants were divided into shoots and roots for silicon concentration analysis. Si significantly reduced the severity of FCRR on the stem of tomato at 4 weeks after inoculation. Results of disease progress suggested that the decrease in the disease severity of FCRR by Si amendment was probably due to a delay in onset in initial infection of roots and the movement of the pathogen from roots to stems. Si contents of roots and shoots were significantly higher in tomato plants supplied with Si than in those without Si. Moreover, the increase in the Si content of roots was significantly correlated with the reduction of disease severity of root, crown and stem, indicating a silicon-mediated resistance. Supplying Si to tomato seedlings can reduce the disease severity of FCRR, providing an alternative disease management strategy.

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Fresh Market Tomato Breeding in the Usa

Cited by 5 publications

References 0 publications

RETRACTED ARTICLE: A reexamination of molecular markers for use in marker-assisted breeding in tomato

RETRACTED ARTICLE: A reexamination of molecular markers for use in marker-assisted breeding in tomato

COMPORTAMIENTO AGRONÓMICO DE POBLACIONES F2 DE HÍBRIDOS DE TOMATE (Solanum lycopersicum L.)

Silicon Suppresses Fusarium Crown and Root Rot of Tomato

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