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  • 1
    Electronic Resource
    Electronic Resource
    Vascular colonization patterns in susceptible and resistant tomato cultivars inoculated with Fusarium oxysporum f.sp. lycopersici races 0 and 1 (2003)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 52 (2003), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The vascular colonization pattern of Fusarium oxysporum f.sp. lycopersici races 0 and 1 in tomato was studied in five susceptible and five resistant cultivar–fungus combinations during a 26-day period after inoculation by root immersion. Propagules spread discontinuously along the stems in all five cultivars 1 day after inoculation, irrespective of cultivar resistance. Five days later the fungus was limited to the stem bases in all cultivars. Between the fifth and 12th days, stem colonization by the fungus stopped in all cultivar–race combinations. Thereafter, the situation remained stable in resistant combinations, with inoculum distributed discontinuously, and no disease symptoms were apparent. By contrast, in the susceptible combinations a gradual upward colonization of the stems was seen such that fungal distribution was no longer discontinuous and disease symptoms appeared. These results suggest that a fungal ‘incubation’ period in the base of the vascular system is required before a secondary invasion of tissues occurs in susceptible genotypes. The slope of the regression line fitted between the height reached by the fungus up the stem (y) and the time after inoculation (x) provides a measure of the horizontal (polygenic) resistance in tomato cultivars
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.2003.00810.x
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  • 2
    Electronic Resource
    Electronic Resource
    Problems of determining parthenocarpy in tomato plants
    Amsterdam : Elsevier
    Scientia Horticulturae 32 (1987), S. 9-15 
    Details
    ISSN: 0304-4238
    Keywords: Lycopersicon esculentum ; fruit size ; parthenocarpy
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4238(87)90011-2
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  • 3
    Electronic Resource
    Electronic Resource
    Relationship between radial and concentric cracking of tomato fruit
    Amsterdam : Elsevier
    Scientia Horticulturae 21 (1983), S. 323-328 
    Details
    ISSN: 0304-4238
    Keywords: Lycopersicon esculentum Mill ; fruit cracking ; genotypic, phenotypic and environmental correlations ; tomato
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4238(83)90122-X
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  • 4
    Electronic Resource
    Electronic Resource
    Genotype-environment interaction in tomato (1982)
    Springer
    Theoretical and applied genetics 61 (1982), S. 273-277 
    Details
    ISSN: 1432-2242
    Keywords: Lycopersicon esculentum ; Genotype environment interaction by regression analysis ; Polyethylene ; Plastic greenhouse ; Polyethylene mulch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Twelve varieties of tomato of economic importance and their hybrids (including reciprocals) were studied in four environments: inside and outside of greenhouses and with and without plastic mulching. Seven characters were recorded per plant per environment: (1) total yield, (2) fruit weight, (3) locules/fruit, (4) fruits/cluster, (5) earliness in maturity, (6) earliness in harvesting and (7) leaves between clusters. There was an almost general tendency for hybrids to show higher values than the parentals for characters (1), (4) and (7); the opposite was true for (2) and (3), even when the differences were not statistically significant at the 5% level. Environments were always highly significant; the effect of the greenhouse explained most of the variation. Genotype-environment interaction by regression analysis showed that the performance of the hybrids was generally higher than that of the parents for characters (1), (4) and (7). Total yield was higher, in general, in the most protected environments. Locules per fruit was very constant but when interaction did exist, the number of locules was higher in the less protected environments. Hybrids interacted with environments more strongly than parent lines. Earliness was the most environmental dependent characteristic the choice of early harvesting being irrelevant. Some of the hybrids obtained seem promising from a commercial point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273785
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  • 5
    Electronic Resource
    Electronic Resource
    Multivariate analysis applied to tomato hybrid production (1984)
    Springer
    Theoretical and applied genetics 69 (1984), S. 39-45 
    Details
    ISSN: 1432-2242
    Keywords: Lycopersicon esculentum ; Tomato hybrids ; Polycross ; Genetic distance ; Multivariate analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Twenty characters were measured on 60 tomato varieties cultivated in the open-air and in polyethylene plastic-house. Data were analyzed by means of principal components, factorial discriminant methods, Mahalanobis D2 distances and principal coordinate techniques. Factorial discriminant and Mahalanobis D2 distances methods, both of which require collecting data plant by plant, lead to similar conclusions as the principal components method that only requires taking data by plots. Characters that make up the principal components in both environments studied are the same, although the relative importance of each one of them varies within the principal components. By combining information supplied by multivariate analysis with the inheritance mode of characters, crossings among cultivars can be experimented with that will produce heterotic hybrids showing characters within previously established limits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262535
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  • 6
    Electronic Resource
    Electronic Resource
    Variability and correlations in muskmelon in relation to the cultivation method (1989)
    Springer
    Theoretical and applied genetics 78 (1989), S. 411-416 
    Details
    ISSN: 1432-2242
    Keywords: Muskmelon variability ; Selection ; Genetic correlations ; Environmental correlations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Six fruit characters have been measured in 23 cultivars of Cucumis melo, representing a wide geographical range. Plants were grown both in the greenhouse and in the field. When the 23 cultivars were analyzed together, the largest component of variance was found between cultivars under both growth conditions, suggesting the existence of large genetic diversity for all the characters studied. Generally, variance between plants within cultivars was less than or equal to variance between fruits within plant. This indicates that environmental variation is the most important part of the variation within cultivars. Correlations between pairs of characters at cultivar, plant and fruit levels were calculated from the variance-covariance components. In the majority of paired traits, the correlation values indicated that genetic and environmental factors may act in the same direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265305
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  • 7
    Electronic Resource
    Electronic Resource
    Phenotypic, genotypic and environmental correlation in tomato (Lycopersicon esculentum) (1982)
    Springer
    Euphytica 31 (1982), S. 151-159 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato cultivars ; phenotypic ; genotypic and environmental correlations ; indirect selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Twelve inbred lines of tomato and their 132 hybrids (reciprocals were considered separately) were studied in four environments: glasshouse and open air, with and without plastic cover. Nine characters were recorded and the phenotypic and environmental correlations between them were obtained within environments and for the complete set of data. Characters showing the highest phenotypic correlation with yield were fruits per cluster and earliness in harvesting, but neither of them is useful for indirect selection for yield. To the contrary, leaves between racemes can be used when selecting for fruits per cluster. Environmental correlations were generally low, excepting total yield in fruits per cluster. Broad sense heritabilities were obtained, which were rather high for fruit weight, locules per fruit, fruits per cluster and leaves between clusters. Some cases in which phenotypic correlations were rather constant for the different environments in spite of the great differences recorded for the genotypic correlation coefficients, are explained because of the great weight (i.e., considering heritabilities) of environmental correlations on phenotypic correlations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028317
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  • 8
    Electronic Resource
    Electronic Resource
    Genetics of the viability of pollen grain produced at low temperatures inLycopersicon Mill. (1995)
    Springer
    Euphytica 84 (1995), S. 139-144 
    Details
    ISSN: 1573-5060
    Keywords: pollen grain viability ; low temperature ; cold tolerance inheritance ; generation means analysis ; tomato ; Lycopersicon esculentum ; Lycopersicon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The different viabilities of pollen produced at low temperatures in intra- and inter-specific crosses of tomato were studied. Cultivars Red Top, Moneymaker, and Marroqui were crossed with cultivar E-15 and these four cultivars were hybridized with lines of the wild speciesL. pimpinellifolium PE-13,L. parviflorum PE-52,L. pennellii PE-47, andL. hirsutum PE-37 and PE-41. A six-generation family of the Moneymaker x PE-47 cross was obtained to carry out a more detailed genetical study of pollen grain viability at low temperatures. Pollen grain viability was evaluated during the winter via acetocarmine staining. When the parents were compared with their F1, the intra-specific tomato crosses showed dominance to better-quality pollen, theL. esculentum x L. pimpinellifolium inter-specific crosses showed positive heterosis, while the crosses ofL. esculentum with the tolerant speciesL. pennellii andL. hirsutum showed intermediate inheritance. However, in theL. esculentum x L. pennellii family, the dominance and the non-allelic interactions (homozygosis x homozygosis) were the most important factors, so that dominance to better viability at low temperatures appeared to be the general mode of inheritance. Genetical control of pollen grain viability at low temperatures seemed to be polygenetic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01677952
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  • 9
    Electronic Resource
    Electronic Resource
    Salinity tolerance of normal-fruited and cherry tomato cultivars (1991)
    Springer
    Plant and soil 136 (1991), S. 249-255 
    Details
    ISSN: 1573-5036
    Keywords: Lycopersicon esculentum ; Maas-Hoffman model ; non-linear regression ; salt-tolerance ; selection ; tomato
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The salinity tolerances (NaCl) of 8 normal-fruited tomato cultivars (Lycopersicon esculentum Mill.) and 4 cherry tomato cultivars (L. esculentum var.cerasiforme) were determined by yield-substrate EC response curves, according to the Mass-Hoffman model, modified by van Genuchten and Hoffman (1984). The same model was used to determine the response curves of leaf dry-weight, stem dry-weight, and plant height against substrate EC and also between yield and leaf concentrations of Cl- and Na ions. According to the salinity-threshold (maximum EC-value without yield reduction) and slope (yield decrease per unit EC increase) parameters, determined from the yield-EC response curves, the cherry tomato cultivars were more salt-tolerant than the normal-fruited ones. However, on the basis of vegetative growth characters-EC response curves, cherry tomato cultivars and normal-fruited ones were similarly affected by NaCl. The ranking of the cultivars by their salinity tolerance, determined from the plots of yield vs. leaf concentrations of Cl- and Na ions, was the same as that evaluated from the yield vs. substrate EC plots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02150056
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  • 10
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    Characterization of competing distortions in YFe_{2} O_{4} (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-05-26
    Description: Author(s): J. Blasco, S. Lafuerza, J. García, G. Subías, V. Cuartero, J. L. García-Muñoz, C. Popescu, and I. Peral We report the structural changes of three YF e 2 O 4 − δ ( δ 〈 0.1 ) specimens using high resolution synchrotron x-ray powder diffraction between 80 and 300 K. All samples adopt a rhombohedral cell at room temperature (space group R 3 ¯ m ). This cell becomes unstable for the three samples on cooling, and the … [Phys. Rev. B 93, 184110] Published Wed May 25, 2016
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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