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The hypersensitive reaction to bacterial canker in Mirabilis jalapa is simply inherited

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Hibberd, A.M., Piperidis, G. and Godwin, L.D. (1996) The hypersensitive reaction to bacterial canker in Mirabilis jalapa is simply inherited. Australasian Plant Pathology, 25 . pp. 64-67. ISSN 1448-6032

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Article Link: https://doi.org/10.1071/AP96011


The four o’clock plant (Mirabilis jalapa) displays a hypersensitive reaction to the causal agent of bacterial canker, Clavibacter michiganensis subsp. michiganensis. Two lines of M jalapa were crossed with one another and a local weed accession not showing the same reaction. All F1 progeny displayed the hypersensitive reaction within 48 h of inoculation with suspensions of Clavibacter michiganensis subsp. michiganensis. Selfed F2 progenies of the two hypersensitive parents were shown to be hypersensitive. F2 populations derived from crosses between either hypersensitive parent and the local non-hypersensitive line displayed Mendelian segregation ratios, 3 hypersensitive: 1 non-hypersensitive. There were no maternal effects. This demonstrates that the trait is under the control of a single dominant gene. Morphological traits including flower colour and cotyledon colour were under more complex genetic control.

Item Type:Article
Subjects:Science > Botany > Genetics
Plant pests and diseases > Plant pathology
Live Archive:04 Apr 2024 23:51
Last Modified:04 Apr 2024 23:51

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