Breeding for resistance to yellow disease of hyacinths. I. Investigations on F1's from diallel crosses |
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| Authors: | J M Van Tuyl S J Toxopeus |
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| Institution: | (1) Institute for Horticultural Plant Breeding (IVT), Wageningen, The Netherlands |
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| Abstract: | Summary Analysis of an incomplete diallel design with 14 hyacinth cultivars for resistance to yellow disease showed a significant GCA and a heritability of 0.75. A correlation appeared to exist between flowering date and degree of resistance to yellow disease, early flowering seedlings being generally less resistant. Of 1440 seedlings 69 were selected as resistant on the basis of absence of leaf symptoms. The results of the selection appeared to be in agreement with the breeding value (GCA) of the parent cultivars. The possible influence of chromosome numbers on the degree of resistance to yellow disease is discussed. |
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| Keywords: | Hyacinthus orientalis hyacinth Xanthomonas hyacinthi yellow disease disease resistance general combining ability flowering date flower colour cytology |
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