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  • 1
    Electronic Resource
    Electronic Resource
    In ovulo embryo culture of tulip (Tulipa L.); effects of culture conditions on seedling and bulblet formation
    Amsterdam : Elsevier
    Scientia Horticulturae 51 (1992), S. 111-122 
    Details
    ISSN: 0304-4238
    Keywords: Tulipa gesneriana L ; bulblet formation ; germination ; in ovulo embryo culture ; tulip
    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(92)90109-P
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  • 2
    Electronic Resource
    Electronic Resource
    Interspecific crosses between Tulipa gesneriana cultivars and wild Tulipa species: a survey (1991)
    Springer
    Sexual plant reproduction 4 (1991), S. 1-5 
    Details
    ISSN: 1432-2145
    Keywords: Tulipa ; Tulip ; Interspecific hybridization ; Incongruity ; Breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Interspecific crosses were made between 76 Tulipa gesneriana cultivars and 28 botanical Tulipa species. Tulipa gesneriana proved fully congruent (all cross-combinations giving hybrid progeny) with members of the subsection Gesnerianae, was moderately affiliated (50% of all cross-combinations giving hybrid progeny) with representatives of the subsection Eichleres, and was found to be incongruent with most other Tulipa species (except T. stapfii of the subsection Oculussolis). Relationships between T. gesneriana and some representatives of the subsection Eichleres were addressed in more detail. Seeds were harvested in all cross-combinations, but the number of seeds depended on the T. gesneriana cultivar used as the female partner. Apparently, the maternal genotype did affect pre- or post-fertilization processes. T. gesneriana was not crossable with T. kaufmanniana of the subsection Spiranthera. In this specific case, however, a bridge cross was used to overcome incongruity. For this, T. kaufmanniana was first combined with T. greigii, and the hybrid was subsequently crossed with T. gesneriana. These results demonstrate possibilities for interspecific cross-combinations in tulips and have offered opportunities for the introduction of desired new traits in the cultivated tulip.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194563
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  • 3
    Electronic Resource
    Electronic Resource
    The initiation of callus and regeneration from callus culture ofTulipa gesneriana (1996)
    Springer
    Plant cell, tissue and organ culture 47 (1996), S. 51-58 
    Details
    ISSN: 1573-5044
    Keywords: cold treatment ; embryogenesis ; flower-stalk segments ; histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cold treatment of seeds, obtained from crosses between cultivars ofT. gesneriana L., affects the developmental stage of embryos, which in turn influences the frequency of callus induction and the development of different callus types. Cold-treated, mature embryos and basal segments ofin vitro-derived bulblets, were suitable explants for the initiation of regenerative callus on medium with 2,4-dichlorophenoxyacetic acid. The bulblets were initiated on flower-stalk segments from cold-stored bulbs ofT. gesneriana ‘Christmas Marvel.’ Histological analyses of regenerative callus revealed the regeneration of bulb-like structures. The influences of culture medium, culture conditions, growth regulators and acetylsalicylic acid, an inhibitor of ethylene, on the initiation and establishment of regenerative callus cultures are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02318965
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  • 4
    Electronic Resource
    Electronic Resource
    Possibilities of selection for keeping quality in tulip breeding (1976)
    Springer
    Euphytica 25 (1976), S. 353-359 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; keeping quality ; breeding ; selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The vase-life in tulip (Tulipa L.) is an important character. Research was done on the possibilities of selecting for keeping quality. It was found that the keeping quality of undetached flowers was strongly correlated with the keeping quality of cut flowers at 17°C in a glasshouse. The period from flowering date till 50% discoloration appeared to be highly correlated with days to perianth drop. For practical reasons the latter trait has preference in selection work. The number of days to discoloration is also an effective selection criterion. Flower longevity in the field in April/May and in the glasshouse were significantly correlated; thus, already in the field a first selection on keeping quality can be carried out. The increase in height for flowering (adult) and non-flowering (juvenile) plants during forcing did not appear to be significantly correlated with flower longevity, so preselection on this character is not promising. Flower longevity was positively correlated with forcing period. This poses some problems in selection, as a long forcing period is considered an undesirable character. The daily water uptake of cut flowers was significantly correlated with flower longevity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041567
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  • 5
    Electronic Resource
    Electronic Resource
    Breeding for resistance to fusarium oxysporumF. SP. tulipae in tulip (tulipaL.).2. phenotypic and genotypic evaluation of cultivars (1979)
    Springer
    Euphytica 28 (1979), S. 67-71 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; Fusarium oxysporum ; Fusarium bulb rot ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Fusarium bulb rot is a serious tulip disease. Breeding for resistance may contribute considerably to a solution of the problem. It has been demonstrated that juvenile and adult bulbs of the same cultivars in Fusarium contaminated soil showed good agreement in degree of resistance. From an incomplete diallel cross of these cultivars second-year bulblets of 62 progenies were planted in both contaminated and non-contaminated soil. The percentages of non-diseased bulbs harvested provided a criterion for resistance. The analysis of combining ability for the degree of resistance revealed that both the mean square of GCA and that of SCA were significant. The relative magnitudes of the GCA and SCA mean squares suggest that resistance is governed primarily by additive gene action. The GCA of individual parents could be estimated and tested. In general it corresponded with their phenotypic behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00029174
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  • 6
    Electronic Resource
    Electronic Resource
    Breeding for resistance to Fusarium oxysporum F. SP. Tulipae in tulip (Tulipa L.). 3. genotypic evaluation of cultivars and effectiveness of pre-selection (1983)
    Springer
    Euphytica 32 (1983), S. 505-510 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; Fusarium oxysporum ; Fusarium bulbrot ; resistance ; pre-selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In this third paper results are given regarding the resistance in adult bulbs of progenies from the incomplete diallel cross of cultivars described in paper 2. It appeared that the resistance in adult bulbs corresponded with the resistance found earlier in juvenile bulbs. Both for juvenile and adult progenies, resistance proved to be mainly determined by additive gene action; GCA's of individual parents of the adult progenies showed good agreement with those found for juvenile ones, indicating that early selection for Fusarium resistance is very effective.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021462
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  • 7
    Electronic Resource
    Electronic Resource
    Inheritance of flower pigments in tulip (Tulipa L.) (1988)
    Springer
    Euphytica 38 (1988), S. 49-55 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; flower colour ; anthocyanidins ; carotenoids ; flavonols ; combining ability ; inheritance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In order to investigate the inheritance of flower colour in tulips, seven cultivars were crossed and selfed in a diallel. Of these parents and their F1's the relative amounts of carotenoids, delphinidin, cyanidin, pelargonidin, quercetin and kaempferol were determined. For delphinidin, quercetin and daempferol only additive gene action was determined, and for carotenoids, cyanidin and pelargonidin also non-additive gene action and plasmic differences. Biosynthesis of delphinidin and pelargonidin was only found when cyanidin was present, while synthesis of delphinidin and pelargonidin was antagonistic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024810
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  • 8
    Electronic Resource
    Electronic Resource
    Determining levels of resistance to Tulip Breaking Virus (TBV) in tulip (Tulipa L.) cultivars (1990)
    Springer
    Euphytica 51 (1990), S. 273-280 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; resistance breeding ; tulip breaking virus ; ELISA ; screening ; inoculation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The resistance of seven tulip cultivars to tulip breaking virus (TBV) was studied after mechanical inoculation by determining the number of infected plants and the level of virus in these plants over a period of one and a half years. Three cultivars (‘Apeldoorn’, ‘Kees Nelis’ and ‘Lustige Witwe’) appeared to be susceptible. Four cultivars (‘Cantata’, ‘Juan’, ‘Madame Lefeber’ and ‘Princeps’) showed a high degree of resistance. The number of infected plants of the latter cultivars was low and virus could not always be detected in the plants at the different sampling dates. Virus could not be detected in these plants after storage. These results indicate that the virus may disappear from or was not detectable in these plants. The levels of infection found are discussed with respect of its significance in studies of TBV in tulips.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039729
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  • 9
    Electronic Resource
    Electronic Resource
    Possibilities of selection for keeping quality in tulip breeding. 2 (1977)
    Springer
    Euphytica 26 (1977), S. 825-828 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; keeping quality ; ornamental value ; selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Criteria of selection for keeping quality in tulip breeding are reviewed on the basis of a wide range of cultivars and species. The conclusion from an earlier, more limited study that there are large differences in keeping quality between cultivars in several characteristics is confirmed. The choice of the number of days between the onset of flowering and perianth drop as the best criterion is reconsidered because in some cases perianths may remain on the plant long after they have lost their attractiveness. It was found that the sequence in which the various stages (50% discoloration. perianth curving, perianth drop, leaves and stem no longer upright) are reached is not the same for all cultivars and species. None of these phenomena can therefore be used exclusively as criterion of keeping quality. A more comprehensive criterion as the number of days the flower maintains its ornamental value, is useful when commercial cultivars are compared, but for breeding and physiological research attention should be given to all individual aspects of the keeping quality of flower. stem and leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021713
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  • 10
    Electronic Resource
    Electronic Resource
    Breeding for resistance to Fusarium oxysporum f. sp. Tulipae in tulip (Tulipa L.). I. Development of a screening test for selection (1978)
    Springer
    Euphytica 27 (1978), S. 441-446 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; Fusarium oxysporum ; resistance ; breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Fusarium oxysporum causes the most serious fungus disease in tulip. Breeding for resistant cultivars may considerably contribute to a solution of the problem. Bulbs of various cultivars planted in contaminated soil showed important and significant differences in resistance. Inoculation trials in the field and in the glasshouse have led to recommendations for the screening of juvenile and adult bulbs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00043170
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