Re: HYB: Pollen Daubing (Mentor Pollen)
>Sharon McAllister wrote:
>> John I. Jones asked:
>> > What does putting sterilized pollen on the stigma do to enhance the
>> chance of
>> > a wide cross? (or do we know?)
>> I don't know. I was justing
>> passing on some old advice.
>> Sharon McAllister
>I do not know if the process is the same in iris but rhis is a technique
>used by lily breeders. The only difference is that a tiny amount of one or
>two compatible pollens are mixed in with the "target" pollen. In this case
>it is not killed first.
>The theory which seems to be held by most practitioners, is that the few
>grains of compatible pollen will overcome any chemical barriers to
>"strange" pollen and open the floodgates as it were. I believe that it was
>Leslie Woodriff who first used this technique on lilies. His great hybrid
>'BLACK BEAUTY' was produced in this manner. A cross between L. speciosum
>and L. henryi. His methods were ridiculed for years and it finally
>required an examination of the chromosomes to persuade the doubters.
>I do not know whether this would work in iris breeding. If the theory is
>correct, it would seem to me that it would not be superceded by embryo
>culture. If the barrier is a chemical one, you would have to overcome that
>before any seeds were produced.
>I would really be interested in the opinions of those who are more up to
>date in bootany than I am.
>Vernon BC Zone 5
Dear John: This is not my field, but I had a very interesting conversation
witha fellow iris hybridizer, Mr. Ackerman, (Japanese iris), who also made
a difficult cross between Franklinia and a camellia. He said he used
anti-immune materials to prevent the hostess flower from rejecting the
pollen. Lloyd Z in Durham NC