Genetic control of resistance to soft rot caused by Erwinia carotovora subsp. carotovora in Zantedeschia spp. (Araceae), section Aestivae |
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| Authors: | Ronald C. Snijder Pim Lindhout Jaap M. van Tuyl |
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| Affiliation: | (1) Plant Research International, Business Unit Biodiversity and Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands;(2) Laboratory of Plant Breeding, Graduate School for Experimental Plant Sciences, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands |
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| Abstract: | The pattern of heredity of resistance to Erwinia carotovora subsp. carotovora in Zantedeschia spp. is investigated. Four species with different resistance levels (Z. albomaculata, Z. elliotiana, Z. pentlandii, Z. rehmannii) were compared to their reciprocal offspring. The occurrence of plastome-genome incompatibility (PGI) affected plant resistance in all families. Therefore, plants that suffered from PGI were omitted from genetic analyses. Resistance was quantitative and the correlation between resistance levels of parents and offspring (h2= 0.33;r2= 0.66) indicated a genetic basis of resistance. Z. rehmannii and Z. albomaculata contributed more resistance genes than Z. elliotiana or Z. pentlandii. Transgression among some of the offspring of Z. rehmannii and Z. albomaculata indicated the presence of complementary resistance genes in these two species and good potential for resistance breeding. |
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| Keywords: | breeding leaf disk test Pectobacterium carotovorum subsp. carotovorum |
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