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Fernando Nuez - One of the best experts on this subject based on the ideXlab platform.
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Variation Revealed by SNP Genotyping and Morphology Provides Insight into the Origin of the Tomato
PLoS ONE, 2012Co-Authors: José Blanca, Laura Cordero, María José Díez, Joaquín Cañizares, Laura Pascual, Fernando NuezAbstract:Tomato, Solanum lycopersicum, is divided into two widely distributed varieties: the cultivated S. lycopersicum var. lycopersicum, and the weedy S. lycopersicum var. cerasiforme. Solanum pimpinellifolium is the most closely related wild species of tomato. The roles of S. pimpinellifolium and S. l. cerasiforme during the domestication of tomato are still under debate. Some authors consider S. l. cerasiforme to be the ancestor, whereas others think that S. l. cerasiforme is an admixture of S. pimpinellifolium and the cultivated S. l. lycopersicum. It is also not clear whether the domestication occurred in the Andean region or in Mesoamerica. We characterized 272 accessions (63 S. pimpinellifolium, 106 S. l. cerasiforme, 95 S. l. lycopersicum and 8 derived from hybridization processes) were morphologically and genetically using the SolCap platform (7,414 SNPs). The two species were distinguished in a PCA analysis and displayed a rich geographic structure. Solanum lycopersicum var. cerasiforme and S. l. lycopersicum were also differentiated in the PCA and Structure analyses, which supports maintaining them as different varieties. Solanum pimpinellifolium and the Andean S. l. cerasiforme were more diverse than the non-Andean S. lycopersicum. Solanum lycopersicum var. cerasiforme was morphologically and molecularly intermediate between S. pimpinellifolium and tomato. Solanum lycopersicum var. cerasiforme, with the exception of several Ecuadorian and Mexican accessions, is composed of the products of admixture processes according to the Structure analysis. The non-admixtured S. l. cerasiforme might be similar to the ancestral cultivars from which the cultivated tomato originated, and presents remarkable morphological diversity, including fruits of up to 6 cm in diameter. The data obtained would fit a model in which a pre-domestication took place in the Andean region, with the domestication being completed in Mesoamerica. Subsequently, the Spaniards took plants from Mesoamerica to Spain and from there they were exported to the rest of the world.
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exploiting partial resistance to tomato yellow leaf curl virus derived from Solanum pimpinellifolium upv16991
Plant Disease, 2008Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:Tomato yellow leaf curl disease (TYLCD) causes great economic losses in tomato crops worldwide. Despite efforts undertaken by different research groups, there are no immune commercial plant materials available. Recently, our group reported partial resistance to TYLCD in line L102, derived from Solanum pimpinellifolium UPV16991. Resistance in this line is monogenic, with partial recessiveness and incomplete penetrance. Even though the resistance gene in L102 is not dominant, we also proved that levels of resistance were high in hybrids with different tomato lines. The objective of this work was to evaluate the level of resistance in plants which combined UPV16991-derived resistance and the Ty-1 gene, both in heterozygosis. Most of the hybrids between S. pimpinellifolium- and S. chilense-derived resistant lines exhibited milder symptoms than heterozygotes for either S. pimpinellifolium- or S. chilense-derived resistance. In some of the hybrids, viral accumulation was also lower than in respective heterozygotes. Our results support the utility of resistance derived from UPV16991 combined with the Ty-1 gene in increasing levels of resistance to TYLCD in tomato hybrids. This is the most practical approach to exploiting resistance derived from UPV16991, because it allows the development of hybrids without the need of fixing the resistance gene in both parents.
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Genetic and bioclimatic variation in Solanum pimpinellifolium
Genetic Resources and Crop Evolution, 2008Co-Authors: Elena Zuriaga, José M. Blanca, Laura Cordero, Alicia Sifres, William G. Blas-cerdán, Rafael Morales, Fernando NuezAbstract:Solanum pimpinellifolium , due to its close relationship to S. lycopersicum , has been a genetic source for many commercially important tomato traits. It is a wild species found in the coastal areas of Peru and Ecuador. In this study, the genetic variation of S. pimpinellifolium was studied using the diversity found in 10 microsatellites in 248 plants spread throughout its entire distribution area, including Ecuador, which has been underrepresented in previous studies. Peruvian and Ecuadorian accessions are genetically quite differentiated. A possible cause of these differences could be the non-uniform nature of the coastal Ecuadorian and Peruvian climates, seeing as an important correlation between genetic differentiation and climate has been found. In addition, Ecuadorian and south Peruvian accessions have a lower genetic diversity and a higher homozygosity due to their higher autogamy, lower population size, and possible colonization bottlenecks. The Galápagos Islands population is an extreme case, with no diversity, likely caused by a recent colonization from the northern continental Ecuadorian region where genetically identical plants have been found.
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Exploiting Partial Resistance to Tomato yellow leaf curl virus Derived from Solanum pimpinellifolium UPV16991.
Plant Disease, 2008Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:ABSTRACT Tomato yellow leaf curl disease (TYLCD) causes great economic losses in tomato crops worldwide. Despite efforts undertaken by different research groups, there are no immune commercial plant materials available. Recently, our group reported partial resistance to TYLCD in line L102, derived from Solanum pimpinellifolium UPV16991. Resistance in this line is monogenic, with partial recessiveness and incomplete penetrance. Even though the resistance gene in L102 is not dominant, we also proved that levels of resistance were high in hybrids with different tomato lines. The objective of this work was to evaluate the level of resistance in plants which combined UPV16991-derived resistance and the Ty-1 gene, both in heterozygosis. Most of the hybrids between S. pimpinellifolium- and S. chilense-derived resistant lines exhibited milder symptoms than heterozygotes for either S. pimpinellifolium- or S. chilense-derived resistance. In some of the hybrids, viral accumulation was also lower than in respective h...
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Inheritance of Tomato yellow leaf curl virus Resistance Derived from Solanum pimpinellifolium UPV16991.
Plant Disease, 2007Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:ABSTRACT Resistance to tomato yellow leaf curl disease (TYLCD) in accession UPV16991 Solanum pimpinellifolium has been previously reported by our group. A breeding program was developed from an initial S. lycopersicum × S. pimpinellifolium UPV16991 cross. This first cross was followed by several selfing generations. Selection for resistance to Tomato yellow leaf curl virus (TYLCV) and Tomato yellow leaf curl Sardinia virus (TYLCSV) was carried out for plants of each generation. One partially resistant F6 plant (L102) was chosen to form the family to study the genetic control of resistance to TYLCV. Crosses between four breeding lines susceptible to TYLCD and L102 were also performed to study the dominance of the resistance in S. lycopersicum genetic backgrounds. Response to TYLCV infection of P1, P2, F1, F2, BC1, and BC2 generations fitted, for this line, a monogenic control with partial recessiveness and incomplete penetrance. The percentage of homozygotic plants with partial resistance was 72.75. Among ...
Enrique Moriones - One of the best experts on this subject based on the ideXlab platform.
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An Acylsucrose-Producing Tomato Line Derived from the Wild Species Solanum pimpinellifolium Decreases Fitness of the Whitefly Trialeurodes vaporariorum.
Insects, 2020Co-Authors: Maria Jose Rodríguez-lópez, Enrique Moriones, Rafael Fernández-muñozAbstract:A combination of biological control and host plant resistance would be desirable for optimally controlling the greenhouse whitefly, Trialeurodes vaporariorum in tomato crops. Whitefly settlement preference, oviposition, and survivorship were evaluated on ABL 10-4 and ‘Moneymaker’, two nearly-isogenic tomato lines with, and without, whitefly-resistance traits based on type IV leaf glandular trichomes derived from the tomato wild species Solanum pimpinellifolium, respectively. Significantly reduced preference of T. vaporariorum adult whiteflies for ABL 10-4 leaves was observed. Moreover, T. vaporariorum altered its abaxial–adaxial settling performance on leaves of ABL 10-4 plants. A significantly lower tendency to settle on abaxial leaf surface was observed in ABL 10-4 compared to Moneymaker plants. Furthermore, T. vaporariorum deposited fewer eggs and exhibited a significantly reduced egg to adult survivorship in ABL 10-4 than in Moneymaker plants. Therefore, reduced fitness and distorted performance were observed for T. vaporariorum on ABL 10-4 tomato plants supporting that type IV leaf glandular trichomes might protect them from this pest and, indirectly, from the viruses it transmits.
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whitefly resistance traits derived from the wild tomato Solanum pimpinellifolium affect the preference and feeding behavior of bemisia tabaci and reduce the spread of tomato yellow leaf curl virus
Phytopathology, 2011Co-Authors: Maria Jose Rodriguezlopez, Elisa Garzo, Jean Patrick Bonani, Alberto Fereres, Rafael Fernandezmunoz, Enrique MorionesAbstract:ABSTRACT Breeding of tomato genotypes that limit whitefly (Bemisia tabaci) access and feeding might reduce the spread of Tomato yellow leaf curl virus (TYLCV), a begomovirus (genus Begomovirus, family Geminiviridae) that is the causal agent of tomato yellow leaf curl disease. TYLCV is restricted to the phloem and is transmitted in a persistent manner by B. tabaci. The tomato breeding line ABL 14-8 was developed by introgressing type IV leaf glandular trichomes and secretion of acylsucroses from the wild tomato Solanum pimpinellifolium accession TO-937 into the genetic background of the whitefly- and virus-susceptible tomato cultivar Moneymaker. Results of preference bioassays with ABL 14-8 versus Moneymaker indicated that presence of type IV glandular trichomes and the production of acylsucrose deterred the landing and settling of B. tabaci on ABL 14-8. Moreover, electrical penetration graph studies indicated that B. tabaci adults spent more time in nonprobing activities and showed a reduced ability to st...
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Whitefly resistance traits derived from the wild tomato Solanum pimpinellifolium affect the preference and feeding behavior of Bemisia tabaci and reduce the spread of Tomato yellow leaf curl virus.
Phytopathology®, 2011Co-Authors: Maria Jose Rodríguez-lópez, Rafael Fernández-muñoz, Elisa Garzo, Jean Patrick Bonani, Alberto Fereres, Enrique MorionesAbstract:Rodriguez-Lopez, M. J., Garzo, E., Bonani, J. P., Fereres, A., FernandezMunoz, R., and Moriones, E. 2011. Whitefly resistance traits derived from the wild tomato Solanum pimpinellifolium affect the preference and feeding behavior of Bemisia tabaci and reduce the spread of Tomato yellow leaf curl virus. Phytopathology 101:1191-1201. Breeding of tomato genotypes that limit whitefly (Bemisia tabaci) access and feeding might reduce the spread of Tomato yellow leaf curl virus (TYLCV), a begomovirus (genus Begomovirus, family Geminiviridae) that is the causal agent of tomato yellow leaf curl disease. TYLCV is restricted to the phloem and is transmitted in a persistent manner by B. tabaci. The tomato breeding line ABL 14-8 was developed by introgressing type IV leaf glandular trichomes and secretion of acylsucroses from the wild tomato Solanum pimpinellifolium accession TO937 into the genetic background of the whitefly- and virus-susceptible tomato cultivar Moneymaker. Results of preference bioassays with ABL 14-8 versus Moneymaker indicated that presence of type IV glandular trichomes and the production of acylsucrose deterred the landing and settling of B. tabaci on ABL 14-8. Moreover, electrical penetration graph studies indicated that B. tabaci adults spent more time in nonprobing activities and showed a reduced ability to start probing. Such behavior resulted in a reduced ability to reach the phloem. The superficial type of resistance observed in ABL 14-8 against B. tabaci probing significantly reduced primary and secondary spread of TYLCV. Additional keywords: acylsugars, disease control.
Ana Pérez De Castro - One of the best experts on this subject based on the ideXlab platform.
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exploiting partial resistance to tomato yellow leaf curl virus derived from Solanum pimpinellifolium upv16991
Plant Disease, 2008Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:Tomato yellow leaf curl disease (TYLCD) causes great economic losses in tomato crops worldwide. Despite efforts undertaken by different research groups, there are no immune commercial plant materials available. Recently, our group reported partial resistance to TYLCD in line L102, derived from Solanum pimpinellifolium UPV16991. Resistance in this line is monogenic, with partial recessiveness and incomplete penetrance. Even though the resistance gene in L102 is not dominant, we also proved that levels of resistance were high in hybrids with different tomato lines. The objective of this work was to evaluate the level of resistance in plants which combined UPV16991-derived resistance and the Ty-1 gene, both in heterozygosis. Most of the hybrids between S. pimpinellifolium- and S. chilense-derived resistant lines exhibited milder symptoms than heterozygotes for either S. pimpinellifolium- or S. chilense-derived resistance. In some of the hybrids, viral accumulation was also lower than in respective heterozygotes. Our results support the utility of resistance derived from UPV16991 combined with the Ty-1 gene in increasing levels of resistance to TYLCD in tomato hybrids. This is the most practical approach to exploiting resistance derived from UPV16991, because it allows the development of hybrids without the need of fixing the resistance gene in both parents.
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Exploiting Partial Resistance to Tomato yellow leaf curl virus Derived from Solanum pimpinellifolium UPV16991.
Plant Disease, 2008Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:ABSTRACT Tomato yellow leaf curl disease (TYLCD) causes great economic losses in tomato crops worldwide. Despite efforts undertaken by different research groups, there are no immune commercial plant materials available. Recently, our group reported partial resistance to TYLCD in line L102, derived from Solanum pimpinellifolium UPV16991. Resistance in this line is monogenic, with partial recessiveness and incomplete penetrance. Even though the resistance gene in L102 is not dominant, we also proved that levels of resistance were high in hybrids with different tomato lines. The objective of this work was to evaluate the level of resistance in plants which combined UPV16991-derived resistance and the Ty-1 gene, both in heterozygosis. Most of the hybrids between S. pimpinellifolium- and S. chilense-derived resistant lines exhibited milder symptoms than heterozygotes for either S. pimpinellifolium- or S. chilense-derived resistance. In some of the hybrids, viral accumulation was also lower than in respective h...
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Inheritance of Tomato yellow leaf curl virus Resistance Derived from Solanum pimpinellifolium UPV16991.
Plant Disease, 2007Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:ABSTRACT Resistance to tomato yellow leaf curl disease (TYLCD) in accession UPV16991 Solanum pimpinellifolium has been previously reported by our group. A breeding program was developed from an initial S. lycopersicum × S. pimpinellifolium UPV16991 cross. This first cross was followed by several selfing generations. Selection for resistance to Tomato yellow leaf curl virus (TYLCV) and Tomato yellow leaf curl Sardinia virus (TYLCSV) was carried out for plants of each generation. One partially resistant F6 plant (L102) was chosen to form the family to study the genetic control of resistance to TYLCV. Crosses between four breeding lines susceptible to TYLCD and L102 were also performed to study the dominance of the resistance in S. lycopersicum genetic backgrounds. Response to TYLCV infection of P1, P2, F1, F2, BC1, and BC2 generations fitted, for this line, a monogenic control with partial recessiveness and incomplete penetrance. The percentage of homozygotic plants with partial resistance was 72.75. Among ...
María José Díez - One of the best experts on this subject based on the ideXlab platform.
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Adaptation to Water and Salt Stresses of Solanum pimpinellifolium and Solanum lycopersicum var. cerasiforme
Agronomy, 2020Co-Authors: Mary-rus Martínez-cuenca, Leandro Pereira-dias, Salvador Soler, Lidia López-serrano, David Alonso, Angeles Calatayud, María José DíezAbstract:Solanum pimpinellifolium and Solanum lycopersicum var. cerasiforme represent a valuable tool for tomato breeding, particularly for tolerance to abiotic stresses. Water stress and salinity are major constraints to tomato’s cultivation, and for which limited genetic variability has been reported within the cultivated species. We evaluated four accessions of S. pimpinellifolium and four of S. l. var. cerasiforme for their adaptation to water deficit and salinity. The CO2 assimilation rate, stomatal conductance, substomatal CO2 concentration, transpiration rate, and leaf chlorophyll concentration were evaluated, as well as morphological and agronomic traits. The accessions showed a remarkable inter- and intra-species response variability to both stresses. Two S. pimpinellifolium accessions and one S. l. var. cerasiforme showed unaltered physiological parameters, thus indicating a good adaptation to water deficit. Two S. l. var. cerasiforme accessions showed an interesting performance under salt stress, one of which showing also good adaptation to water stress. In general, both stresses showed a negative impact on leaf size and fruit fresh weight, especially in the big-sized fruits. However, flowering, fruit setting and earliness remained unaltered or even improved when compared to control conditions. Stressed plants yielded fruits with higher ° Brix. Response to stresses seemed to be linked to origin environmental conditions, notwithstanding, variability was observed among accessions of the same region.
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Variation Revealed by SNP Genotyping and Morphology Provides Insight into the Origin of the Tomato
PLoS ONE, 2012Co-Authors: José Blanca, Laura Cordero, María José Díez, Joaquín Cañizares, Laura Pascual, Fernando NuezAbstract:Tomato, Solanum lycopersicum, is divided into two widely distributed varieties: the cultivated S. lycopersicum var. lycopersicum, and the weedy S. lycopersicum var. cerasiforme. Solanum pimpinellifolium is the most closely related wild species of tomato. The roles of S. pimpinellifolium and S. l. cerasiforme during the domestication of tomato are still under debate. Some authors consider S. l. cerasiforme to be the ancestor, whereas others think that S. l. cerasiforme is an admixture of S. pimpinellifolium and the cultivated S. l. lycopersicum. It is also not clear whether the domestication occurred in the Andean region or in Mesoamerica. We characterized 272 accessions (63 S. pimpinellifolium, 106 S. l. cerasiforme, 95 S. l. lycopersicum and 8 derived from hybridization processes) were morphologically and genetically using the SolCap platform (7,414 SNPs). The two species were distinguished in a PCA analysis and displayed a rich geographic structure. Solanum lycopersicum var. cerasiforme and S. l. lycopersicum were also differentiated in the PCA and Structure analyses, which supports maintaining them as different varieties. Solanum pimpinellifolium and the Andean S. l. cerasiforme were more diverse than the non-Andean S. lycopersicum. Solanum lycopersicum var. cerasiforme was morphologically and molecularly intermediate between S. pimpinellifolium and tomato. Solanum lycopersicum var. cerasiforme, with the exception of several Ecuadorian and Mexican accessions, is composed of the products of admixture processes according to the Structure analysis. The non-admixtured S. l. cerasiforme might be similar to the ancestral cultivars from which the cultivated tomato originated, and presents remarkable morphological diversity, including fruits of up to 6 cm in diameter. The data obtained would fit a model in which a pre-domestication took place in the Andean region, with the domestication being completed in Mesoamerica. Subsequently, the Spaniards took plants from Mesoamerica to Spain and from there they were exported to the rest of the world.
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exploiting partial resistance to tomato yellow leaf curl virus derived from Solanum pimpinellifolium upv16991
Plant Disease, 2008Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:Tomato yellow leaf curl disease (TYLCD) causes great economic losses in tomato crops worldwide. Despite efforts undertaken by different research groups, there are no immune commercial plant materials available. Recently, our group reported partial resistance to TYLCD in line L102, derived from Solanum pimpinellifolium UPV16991. Resistance in this line is monogenic, with partial recessiveness and incomplete penetrance. Even though the resistance gene in L102 is not dominant, we also proved that levels of resistance were high in hybrids with different tomato lines. The objective of this work was to evaluate the level of resistance in plants which combined UPV16991-derived resistance and the Ty-1 gene, both in heterozygosis. Most of the hybrids between S. pimpinellifolium- and S. chilense-derived resistant lines exhibited milder symptoms than heterozygotes for either S. pimpinellifolium- or S. chilense-derived resistance. In some of the hybrids, viral accumulation was also lower than in respective heterozygotes. Our results support the utility of resistance derived from UPV16991 combined with the Ty-1 gene in increasing levels of resistance to TYLCD in tomato hybrids. This is the most practical approach to exploiting resistance derived from UPV16991, because it allows the development of hybrids without the need of fixing the resistance gene in both parents.
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Exploiting Partial Resistance to Tomato yellow leaf curl virus Derived from Solanum pimpinellifolium UPV16991.
Plant Disease, 2008Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:ABSTRACT Tomato yellow leaf curl disease (TYLCD) causes great economic losses in tomato crops worldwide. Despite efforts undertaken by different research groups, there are no immune commercial plant materials available. Recently, our group reported partial resistance to TYLCD in line L102, derived from Solanum pimpinellifolium UPV16991. Resistance in this line is monogenic, with partial recessiveness and incomplete penetrance. Even though the resistance gene in L102 is not dominant, we also proved that levels of resistance were high in hybrids with different tomato lines. The objective of this work was to evaluate the level of resistance in plants which combined UPV16991-derived resistance and the Ty-1 gene, both in heterozygosis. Most of the hybrids between S. pimpinellifolium- and S. chilense-derived resistant lines exhibited milder symptoms than heterozygotes for either S. pimpinellifolium- or S. chilense-derived resistance. In some of the hybrids, viral accumulation was also lower than in respective h...
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Inheritance of Tomato yellow leaf curl virus Resistance Derived from Solanum pimpinellifolium UPV16991.
Plant Disease, 2007Co-Authors: Ana Pérez De Castro, María José Díez, Fernando NuezAbstract:ABSTRACT Resistance to tomato yellow leaf curl disease (TYLCD) in accession UPV16991 Solanum pimpinellifolium has been previously reported by our group. A breeding program was developed from an initial S. lycopersicum × S. pimpinellifolium UPV16991 cross. This first cross was followed by several selfing generations. Selection for resistance to Tomato yellow leaf curl virus (TYLCV) and Tomato yellow leaf curl Sardinia virus (TYLCSV) was carried out for plants of each generation. One partially resistant F6 plant (L102) was chosen to form the family to study the genetic control of resistance to TYLCV. Crosses between four breeding lines susceptible to TYLCD and L102 were also performed to study the dominance of the resistance in S. lycopersicum genetic backgrounds. Response to TYLCV infection of P1, P2, F1, F2, BC1, and BC2 generations fitted, for this line, a monogenic control with partial recessiveness and incomplete penetrance. The percentage of homozygotic plants with partial resistance was 72.75. Among ...
Rafael Fernandezmunoz - One of the best experts on this subject based on the ideXlab platform.
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highly efficient genomics assisted development of a library of introgression lines of Solanum pimpinellifolium
Molecular Breeding, 2014Co-Authors: Walter Barrantes, Antonio Granell, Asuncion Fernandezdelcarmen, Gloria Lopezcasado, Maria Angeles Gonzalezsanchez, Rafael Fernandezmunoz, Antonio J. MonforteAbstract:The Solanum pimpinellifolium L. accession TO-937 is resistant to pests due to the presence of type IV glandular trichomes and also has the potential to increase fruit quality traits in tomato cultivars. This accession was selected to develop a genomic library of introgression lines (IL) in the genetic background of tomato cultivar “Moneymaker.” In order to increase the accuracy and speed of the IL development process, high-throughput single-nucleotide polymorphism (SNP) genotyping steps were performed in early backcross generations. Five to seven generations were needed to complete the final set of 53 ILs that were characterized with the 8K SNP SOLCAP Infinium array, which demonstrated that the introgressions present in the IL set covered 94 % of the donor genome and that each IL contained an average of 4.25 % (25 Mb) of the donor genome, defining 71 bins of about 10 Mb on average. Additionally, 37 previously undetected, unwanted introgressions were also detected, and most of them very small (<2 Mb), probably due to double recombination events among the markers used during IL development. Compared to other IL collections recently characterized with high-throughput SNP technologies, the current IL collection contains a significantly lower number of smaller-sized, non-selected introgressions. The combination of several steps of high-throughput genotyping at early generations and the relatively large population size allowed us to construct a collection of ILs with an extraordinary genetic background isogenicity in a relatively short period of time.
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whitefly resistance traits derived from the wild tomato Solanum pimpinellifolium affect the preference and feeding behavior of bemisia tabaci and reduce the spread of tomato yellow leaf curl virus
Phytopathology, 2011Co-Authors: Maria Jose Rodriguezlopez, Elisa Garzo, Jean Patrick Bonani, Alberto Fereres, Rafael Fernandezmunoz, Enrique MorionesAbstract:ABSTRACT Breeding of tomato genotypes that limit whitefly (Bemisia tabaci) access and feeding might reduce the spread of Tomato yellow leaf curl virus (TYLCV), a begomovirus (genus Begomovirus, family Geminiviridae) that is the causal agent of tomato yellow leaf curl disease. TYLCV is restricted to the phloem and is transmitted in a persistent manner by B. tabaci. The tomato breeding line ABL 14-8 was developed by introgressing type IV leaf glandular trichomes and secretion of acylsucroses from the wild tomato Solanum pimpinellifolium accession TO-937 into the genetic background of the whitefly- and virus-susceptible tomato cultivar Moneymaker. Results of preference bioassays with ABL 14-8 versus Moneymaker indicated that presence of type IV glandular trichomes and the production of acylsucrose deterred the landing and settling of B. tabaci on ABL 14-8. Moreover, electrical penetration graph studies indicated that B. tabaci adults spent more time in nonprobing activities and showed a reduced ability to st...
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resistencia a tuta absoluta en una entrada de la especie silvestre de tomate Solanum pimpinellifolium
Phytoma España: La revista profesional de sanidad vegetal, 2010Co-Authors: R Escobar, Rafael Fernandezmunoz, M Rodriguez J Lopez, Juan Manuel Alba Cano, M E N FonsecaAbstract:Una entrada de la especie silvestre de tomate S. pimpinellifolium del banco de germoplasma de la Estacion Experimental La Mayora � CSIC presenta resistencia a plagas (arana roja y mosca blanca) merced a sus tricomas glandulares de tipo IV y produccion de acilsacarosas. Con el fin de estudiar si esta entrada y otros genotipos de tomate de ella derivados eran tambien resistentes a T. absoluta, se realizaron experimentos en condiciones de invernadero en CNPH (Brasilia, Brasil) y, una vez que Tuta se introdujo en Espana, en la E.E. La Mayora (Algarrobo, Malaga). Los genotipos con tricomas de tipo IV sufrieron menores danos por la plaga, especialmente en las hojas apicales, mas jovenes. La posibilidad del control de Tuta mediante la utilizacion de variedades resistentes queda abierta a futuros programas de mejora genetica del caracter.