Re: HYB:Crossing with whites

--- In iris-talk@egroups.com, "Christie Pierson" <kenl12@a...> wrote:
> Patricia,
> I too would like to know more about crossing with whites, maybe Paul 
or Chuck can help. 
> You are interested in breeding a pink with beards of blue, white or 
self. (blue sounds great to me too!) 
> Here are two examples of pink "glaciatas" from plicata lines. 
Answered Prayers, Kepple '95, EM, 36"- Classmate x inv.sdlg."Ruffled 
clear light pink "glaciata" from plic lines". 
> Jenny Lynn, Burseen 2000,37",EM.  " It is a great grower, dependable 
bloomer, and bigger and taller than most pinks not to mention an 
interesting parent. A pure self in pearled light pink tones,it is a 
glaciata from plicata lineage with ruffles, lace, and show stopping 
stalks". (Change of PacexDawn Sky) x Lotta Plicata
> Interesting isn't it that pure colors can come plics???
> We are very interested in hybridizing as it adds a new dimention to 
this addicting hobby.So far we haven't come up with too many goals 
except for vigor and maybe a new PATTERN!!! I dream of going to the 
seedling patch(About 320 seedlings) and seeing our cross of Hello 
Darkness x Warchief result in a pure red over a pure black!! (dream on 
) The more we learn the more we realize it just doesn't work like 
that!I am confused about what supresses what? Does the yellow 
(carotene) pigment suppress the blue (anthocyanin  ,spelling?) or is 
it the other way around? Then I heard it doesn't work that way if both 
are present in the same flower already such as EDITH WOLFORD? AS for 
white .... white is so dominant in most flowers , I really don't have 
a clue! It would be alot more fun to have educated dreams , rather 
than pipe dreams!  
> Christie Pierson
> zone 7/8 , finally expecting rain after none for 2 months!
> Julian Ca, San Diego County USA  
> 
> 
There are several types of white genetically. Whites have the genes 
for suppression of anthocyanin, either as the dominant gene (as often 
seen in whites comming from blue lines) in which case only one of four 
sets of this gene is needed, as a Ressessive Reduced Anthocyanin, four 
sets of genes needed, or as a glaciata (RRA form of plicata) with four 
genes needed. This has nothing to do with the yellows which are 
independent, and usually have no influence on each other. Whites also 
have to have no yellow pigments. This reduction of yellow (or pink) is 
mostly under the control of a recessive gene so requires four sets. 
There has been speculation re a dominant gene to supress carotine 
pigments, but no clear isolation of this as far as I know.

Most pinks seem to have a mix of glaciata genes and almost all have 
the RRC genes. This makes it hard to sort out exactly whats happening 
genetically with pinks. Pinks with blue beards are not glaciatas , but 
a perusal of offspring suggest that Vanity and Beverly Sills either 
carry three glaciata genes or are glaciatas as well as RRC.To get blue 
beards you would need to have at least one parent that has blue in the 
beard. To get white beards on pink is likely a case of carefull line 
breeding and selection. I personnally suspect that the less pink the 
beard is, the less pink the flower will be. A possible approaach could 
be to select for those pinks with a white area below the beard.

"The World of Iris" is recommended reading for a good understanding of 
genetics and pigments. Also review  previous posts and go to aarcives 
at Mallon and do a search. Lots of good information there.
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