Possibilities of selection for keeping quality in tulip breeding. 2 |
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| Authors: | J P Van Eijk W Eikelboom L D Sparnaaij |
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| Institution: | (1) Institute for Horticultural Plant Breeding (IVT), Wageningen, the Netherlands |
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| Abstract: | 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. |
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| Keywords: | Tulipa tulip keeping quality ornamental value selection |
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