Transition Studies in Flowering Plants  

by Rolf Baumberger

04 - epi-Mendelian Inheritance

What is epi - Mendelian inheritance?

The Mendelian inheritance is known and can be applied to the two morphs. Crossing a yellow-flowering and a red-flowering Morph from Diplacus gives the F1 generation uniform orange flowers. Inbred lines of F1, segregates in the F2 generation. One can cross F1 plants either with the yellow or then the red morph. Both parental morphs are self-compatible and cross-fertile. So far, so good. The different resulting morphs (F1, F2, F1xY, F1xR) are all stable in time. 

In nature, however, within a broad transition zone, morphs can be observed that are temporally unstable and change their (epi-) genetic information in a time-dependent manner. Starting from the yellow morph (green arrow), they slowly turn into an orange morph and then into a red one. When inbred lines are performed from transitive stages every fifth year, one gets descendants that vary more or less depending on the duration of the transition. The distribution of the variation is very similar to the Mendelian distribution(grey boxplots). We call this process epi-Mendelian inheritance. At the end stage (after15-20 years), a final form with homozygous red morphs is reached. 

To apply Mendel's laws, however, one always starts from two closely related parent forms (red arrows). 

The time-based epi-Mendelian process leads to evolution solely by acquiring genetic information (gain of genetic information).


1) In the long run, every single yellow plant of Diplacus australis within an active transition zone reaches the  ⋀2-color tone that is finally a darker red (a=53; b=33; L=43).

2) The acquired new state is stored genetically somehow in the plant tissue cells.

3) Charles Darwin's concept of speciation by natural selection is 160 years old and will soon be obsolete and should be replaced by a physical model. Explaining evolution by variation and selection alone is a nuisance today in which every smallest molecule can be studied. Of course, only the analytic approach is wrong - the survival of the fittest, if one means the optimized form - is correct, but the underlying mechanisms are a nineteenth-century fantasy emanating from embarrassment. Otherwise one would have to recognize God as the Creator. One did not want that anymore. With a little effort, however, one can find a better physical theory that is good enough.

In addition, the selection theory or hypothesis can be elegantly falsified with the above findings because a generation change is not required. It works without it! But that was an elementary condition for Darwin's theory.