Re: HYB: Umbrata trait and origin -- pinks and yellows

The distribution of pink pigment (Lycopene) is going to be the same as the
carotene yellows.  I haven't looked at yellow amoenas for a while--I will be
next year or two as I have some that move in this direction or are amoenas,
and I think--long term memory--that those of Mel Suiter I saw (LADY APRIL and
kin) had yellow on both sides--top and bottom--of the fall.

I do know that the "Joyce Terry" pattern can be solid on the outsides of
standards and falls, then on the topside of the falls and the inside of the
standards the white area with yellow band are the same.  If this can happen in
yellow, so can it happen in pink.

From the data Carole Taber published on the list here, and in the book from
which it came, recall that Lycopene *preceeds* the primary carotene
yellows--beta-carotene and alpha-carotene in the synthesis chain, depending on
whether one enzyme alone, or the same enzyme plus another are involved in the
last step of synthesis.  These just affect which carotenoid is expressed, not
how it is patterned.

The carotenoid series of pigments come from *variegata,* yes--but the blocker
preventing Lycopene from being converted to carotene-yellows may come from
another source.  If I remember correctly, Keith Keppel has pointed to Kashmir
White, or *kashmiriana,* as the source of that blocker--"t".

The genetics making for yellow amoenas probably comes in from the tetraploids
too.  I would be willing to bet that DOLLY MADISON is one of the varieties
that carry this, and probably W. R. DYKES as well.  If so, the factor may be
scattered through the Hall pinks.  PALOMINO is behind the group of siblings
that were yellow amoenas Gordon Plough introduced (FLAME KISS and its kin),
and also the Hamblen line, as one parent of VALIMAR.  GLITTERING AMBER is only
one of hers that has an intensification of yellow in the hafts, probably a
form of the yellow/pink amoena set.

Neil Mogensen  z 7  western NC mountains

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