Here is a chart of a cross of Eramosa Blushing Bride X Dreamsicle and
their children. all of the seedlings that have so far bloomed from this
cross.
Eramosa Blushing bride is a light pink with a slight anthocyanin wash.
Some of the offspring have heavy anthocyanin as the gene suppressing
anthocyanin is absent in some of the seedlings. The first seedling, the
violet , has no carotene in petals , just anthocyanin, so it is violet.
the others have lycopene plus anthocyanin to give various shades or
red-violet, or rose colour.
The carotene present as lycopene varies in phenotype from pink to
peach, with some apricot. In addition the might be some trace
anthocyanin to add to shading. This results from mixing up of the
modifier genes which are present in each of the parents , but are not
complementary. The modifier genes work to prevent bleed through of
the carotenes, that is partial conversion of lycopene to byproducts of
alpha and beta-carotene. These two conversions are separate and
independent conversions and to produce pure pink, they must both be
blocked.
In pairs of pinks that have compatible modifier genes you can have all
pink offspring from two pink parents..
It would appear that there is no alternative yellow present in these
seedlings, and certainly not present in either parent as a phenotype.
For interest in how these pictures are prepared. I used Adobe Indesign,
and export to a jpg file. Photos preped for compression and suitable
size with Adobe Photoshop.
There is likely more available and cheaper programs that can do the
same thing.
Chuck Chapman
