Summary
The recurrent back-mutation from homozygous recessive chlorina to heterozygous dominant green in leaves of variegated Mirabilis jalapa is explicable on the hypothesis of a controlling element system. The analysis of variance of mutation frequency suggests that there is polygenic control modifying the major regulatory gene, an idea which is supported by a significant parent offspring regression. There is also evidence for a change of state in the regulatory element giving rise to a new mutability pattern.
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Delool, R.A.H., Tilney-Bassett, R.A.E. The inheritance of the mutable variegated leaf in Mirabilis jalapa L.. Euphytica 33, 169–176 (1984). https://doi.org/10.1007/BF00022763
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DOI: https://doi.org/10.1007/BF00022763