Re: HYB: inheritance of LIGHT rims?

Dave,

Unless I am mistaken (as I often am......) *all* yellow pigment and patterning
stem from variegata, in large part due to the work of the Sass family in
Nebraska.

I. variegata has two basic characters we retain in modern tetraploids--the "Y"
factor which is responsible for all yellow, pink, orange coloring except
perhaps some rare varieties that have xanthophyll for their yellow coloring
(if any).

The other characteristic is a *fall overlay* pattern that you rightly note
varies from practically non-existent to solid color.  The reverse of the fall,
and often the upper side rim are the color of the standards.

Variations in the distribution of the "Y" (carotene) pigment are governed by
other genetic factors, some of which appear to be present in variegata, but
others may have come in from other species.

The "Y" factor is converted from carotene to lycopene by a factor Keith Keppel
believes (if I am rightly informed) came into the mix from the white
tetraploid form of I. kashmiriana.  Even if this is not from Keith, the
identification of kashmiriana seems quite probable to me.

I had meant to respond to Linda Mann's query along this line (fall rim
patterns) but didn't get to it in a timely way.  If it has the
variegata/Wabash type of overlay with the back side of the petal the color of
the standards, we are looking at the variegata fall pattern, however
expressed.  If the backside is colored like the top, then the pattern has some
connection with the factors in Progenitor or some co-factor from some other
origen getting mixed into the Progenitor-derived bicolors.  Barry Blyth's
bicolors with fall colors banded with the color of the standards may be of
either type.  I've not had a chance to look at one to see what the OTHER side
of the fall looked like.

Wabash is a tetraploid "variegata" without yellow.  It of course has hybrid
mix involved from pallida as well.

There are other beardeds than variegata that have yellow coloring, such as
whatever I. chamaeiris is called now, reichenbachii and some of the more
extreme dwarfs.  Few if any of those pigments have entered into TB tetraploids
until a few generations ago in iris breeding.

So someone tell me I'm wrong, ok?

Neil Mogensen  z 6b/7a near Asheville until 4:30 tomorrow morning......then
I'm on my way eastward.

---------------------------------------------------------------------
To sign-off this list, send email to majordomo@hort.net with the
message text UNSUBSCRIBE IRIS
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index